Materiały źródłowe

• #1 Diagnostics of Amyotrophic Lateral Sclerosis: Up to Date

  https://pmc.ncbi.nlm.nih.gov/articles/PMC7913557/

  Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease characterized by gradual loss of upper and lower motor neurons and their pathways, usually without affecting the extraocular and sphincter muscles. […] The diagnosis of ALS is determined by excluding other conditions and utilizing clinical examinations, laboratory and genetic tests and nerve conduction/needle electromyography studies (EMG). […] Electromyography (EMG) and conduction studies are the basic aids in diagnosis and serve both to identify diseases that mimic ALS and to demonstrate the loss of motor units, which is the basic defining characteristic of the pathogenesis of ALS. […] The structure of the diagnostics of ALS is based on the revised El Escorial criteria. […] The diagnosis of ALS is consequential and must therefore be properly substantiated electrophysiologically, which requires the examination of a significant number of muscles.

• #2 Amyotrophic Lateral Sclerosis Clinical Presentation: History, Physical Examination, Diagnostic Criteria

  https://emedicine.medscape.com/article/1170097-clinical

  The diagnosis of amyotrophic lateral sclerosis (ALS) is primarily clinical. When the disease has progressed far in its course and involves many parts of the body, the patients appearance and the findings on the neurologic examination may provide sufficient evidence for the diagnosis. When a patient presents with the first symptoms, however, making the diagnosis is not straightforward. […] ALS may be suspected whenever an individual develops insidious loss of function or gradual, slowly progressive, painless weakness in 1 or more regions of the body, without changes in the ability to feel, and no other cause is immediately evident. […] In 7580% of patients, symptoms begin with limb involvement, while 2025% of patients present with bulbar symptoms. […] The diagnosis of ALS requires the presence of the following: Signs of lower motor neuron (LMN) degeneration by clinical, electrophysiological or neuropathologic examination, Signs of upper motor neuron (UMN) degeneration by clinical examination, and Progressive spread of signs within a region or to other regions, together with the absence of: Electrophysiological evidence of other disease processes that might explain the signs of LMN and/or UMN degenerations; and Neuroimaging evidence of other disease processes that might explain the observed clinical and electrophysiological signs. […] The Awaji criteria consider equally the clinical and neurophysiological evidence of LMN involvement. […] In summary, earlier diagnosis of ALS is possible today in individual cases, relative to years past, if alternative causes for early, limited, progressive disease are excluded.

• #3 Amyotrophic Lateral Sclerosis (ALS) Diagnosis | ALS News TodayEnvelope icon

  https://alsnewstoday.com/als-diagnosis/

  Confirming a diagnosis of amyotrophic lateral sclerosis (ALS) is typically a complex process that involves testing for signs indicative of the progressive neurodegenerative disease, and ruling out other potential disorders that could cause similar symptoms. […] Because it shares common symptoms and signs with other neurological diseases, there is no definitive test for ALS, which usually begins in patients between ages 55 and 75. […] Instead, the diagnosis is based on a period of observation to track the progression of symptoms, combined with a series of clinical tests to exclude other conditions. It generally takes about 10-16 months from the onset of symptoms before a diagnosis of ALS is confirmed. […] The main parameters used to diagnose ALS are called the El Escorial criteria, named after a conference center in Spain where the diagnostic guidelines were first developed by the World Federation of Neurology. These guidelines were initially published in 1994, but have since been updated to account for advances in the scientific understanding of ALS.

• #4 Early Diagnosis of ALS Benefits Patients

  https://www.contemporaryclinic.com/view/early-diagnosis-of-als-benefits-patients

  Amyotrophic lateral sclerosis is difficult to diagnose early because it can mimic other neurological diseases. […] On average, individuals with the neurodegenerative condition amyotrophic lateral sclerosis (ALS) are diagnosed approximately 12 months after their first symptom and survive for approximately 3 to 5 years following diagnosis. […] There is also no test that can provide a rapid or definitive diagnosis for ALS. […] As a result, ALS can be difficult to identify, and the diagnostic journey of an individual with the disease may involve many health care professionals and testing before the correct diagnosis is established. […] Delayed diagnosis is a problem, because it prevents individuals with ALS from seeking multidisciplinary care that may improve their quality of life and defers the initiation of disease-modifying treatment.

• #5

  https://link.springer.com/article/10.1007/s10072-023-06997-1

  Diagnosing a rare disease, such as amyotrophic lateral sclerosis, is a major challenge for physicians and patients. […] Despite detailed diagnostic criteria, this process often does not proceed as it should, exacerbating the problems of patients. […] The median time from 1st symptoms to diagnosis was almost 12 months and mean almost 20 months (min. 3, max 106). Only 5 patients waited less than 6 months for being diagnosed. Over 80% of patients received an alternative diagnosis on the first attempt. […] However, in many cases, the disease is diagnosed too late. It also happens that a wrong diagnosis causes inaccurate treatment, which accelerates the development of ALS. […] The study aimed to find out how the diagnosis of amyotrophic lateral sclerosis was carried out, including how long patients waited for the final diagnosis from the first symptoms they observed and what diseases were diagnosed and even treated before the final diagnosis of ALS.

• #6 Diagnostics of Amyotrophic Lateral Sclerosis: Up to Date

  https://pmc.ncbi.nlm.nih.gov/articles/PMC7913557/

  Revised El Escorial criteria are used for the diagnosis, which divide the ALS forms into clinically definitive, clinically probable, clinically probable ALS laboratory supported (EMG) and possible ALS. […] The Awaji criteria allow the diagnosis of ALS to be made earlier and in more patients due to the evaluation of fasciculations. […] Motor evoked potentials (MEP) after transcranial magnetic stimulation (TMS) confirm the lesion of the UMN or corticospinal pathway. […] These days, determination of suitable biomarkers in ALS is an important issue for practical management of ALS, providing significant potential for diagnostics, prediction of disease course and optimisation of the therapeutic responses. […] Neurophysiological biomarkers of LMN dysfunction, including motor unit number estimation, the neurophysiological index, electrical impedance EMG and axonal excitability techniques, can be easily used to monitor the progression of ALS.

• #7 Diagnosis – Amyotrophic Lateral Sclerosis (ALS) – Diseases | Muscular Dystrophy Association

  https://www.mda.org/disease/amyotrophic-lateral-sclerosis/diagnosis

  Recommended guidelines have been published for the diagnosis of ALS. The revised El Escorial criteria and Awaji criteria are the most commonly used diagnostic criteria for ALS, and consensus diagnostic classifications based on these two criteria are also available. These criteria may include: Signs of degeneration of lower motor neurons, which are in the spinal cord and brainstem, by clinical examination or specialized testing […] If ALS is suspected, the next step is usually an electromyography, or EMG. This test measures the signals that run between nerves and muscles and the electrical activity inside muscles to see if there is a pattern consistent with ALS. If there is, more tests likely will be ordered. EMG patterns in ALS are due to the acute and chronic denervation and reinnervation of the affected muscles.

• #8 Amyotrophic Lateral Sclerosis Clinical Presentation: History, Physical Examination, Diagnostic Criteria

  https://emedicine.medscape.com/article/1170097-clinical

  The diagnosis of amyotrophic lateral sclerosis (ALS) is primarily clinical. When the disease has progressed far in its course and involves many parts of the body, the patients appearance and the findings on the neurologic examination may provide sufficient evidence for the diagnosis. When a patient presents with the first symptoms, however, making the diagnosis is not straightforward. […] ALS may be suspected whenever an individual develops insidious loss of function or gradual, slowly progressive, painless weakness in 1 or more regions of the body, without changes in the ability to feel, and no other cause is immediately evident. […] In 7580% of patients, symptoms begin with limb involvement, while 2025% of patients present with bulbar symptoms. […] The diagnosis of ALS requires the presence of the following: Signs of lower motor neuron (LMN) degeneration by clinical, electrophysiological or neuropathologic examination, Signs of upper motor neuron (UMN) degeneration by clinical examination, and Progressive spread of signs within a region or to other regions, together with the absence of: Electrophysiological evidence of other disease processes that might explain the signs of LMN and/or UMN degenerations; and Neuroimaging evidence of other disease processes that might explain the observed clinical and electrophysiological signs. […] The Awaji criteria consider equally the clinical and neurophysiological evidence of LMN involvement. […] In summary, earlier diagnosis of ALS is possible today in individual cases, relative to years past, if alternative causes for early, limited, progressive disease are excluded.

• #9 Amyotrophic lateral sclerosis | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/amyotrophic-lateral-sclerosis-3?lang=us

  Amyotrophic lateral sclerosis typically is diagnosed in middle age. […] El Escorial criteria for the diagnosis of amyotrophic lateral sclerosis requires the presence of signs of lower motor neuron (LMN) degeneration by clinical, electrophysiological or neuropathologic examination, signs of upper motor neuron (UMN) degeneration by clinical examination, and progressive spread of signs within a region or to other regions. […] Together with the absence of electrophysiological evidence of other disease processes that might explain the signs of LMN and/or UMN degenerations, and neuroimaging evidence of other disease processes that might explain the observed clinical and electrophysiological signs. […] Amyotrophic lateral sclerosis typically progresses to death in 2-6 years, usually from respiratory complications.

• #10 Amyotrophic Lateral Sclerosis Clinical Presentation: History, Physical Examination, Diagnostic Criteria

  https://emedicine.medscape.com/article/1170097-clinical

  The diagnosis of amyotrophic lateral sclerosis (ALS) is primarily clinical. When the disease has progressed far in its course and involves many parts of the body, the patients appearance and the findings on the neurologic examination may provide sufficient evidence for the diagnosis. When a patient presents with the first symptoms, however, making the diagnosis is not straightforward. […] ALS may be suspected whenever an individual develops insidious loss of function or gradual, slowly progressive, painless weakness in 1 or more regions of the body, without changes in the ability to feel, and no other cause is immediately evident. […] In 7580% of patients, symptoms begin with limb involvement, while 2025% of patients present with bulbar symptoms. […] The diagnosis of ALS requires the presence of the following: Signs of lower motor neuron (LMN) degeneration by clinical, electrophysiological or neuropathologic examination, Signs of upper motor neuron (UMN) degeneration by clinical examination, and Progressive spread of signs within a region or to other regions, together with the absence of: Electrophysiological evidence of other disease processes that might explain the signs of LMN and/or UMN degenerations; and Neuroimaging evidence of other disease processes that might explain the observed clinical and electrophysiological signs. […] The Awaji criteria consider equally the clinical and neurophysiological evidence of LMN involvement. […] In summary, earlier diagnosis of ALS is possible today in individual cases, relative to years past, if alternative causes for early, limited, progressive disease are excluded.

• #11 Diagnostics of Amyotrophic Lateral Sclerosis: Up to Date

  https://pmc.ncbi.nlm.nih.gov/articles/PMC7913557/

  Revised El Escorial criteria are used for the diagnosis, which divide the ALS forms into clinically definitive, clinically probable, clinically probable ALS laboratory supported (EMG) and possible ALS. […] The Awaji criteria allow the diagnosis of ALS to be made earlier and in more patients due to the evaluation of fasciculations. […] Motor evoked potentials (MEP) after transcranial magnetic stimulation (TMS) confirm the lesion of the UMN or corticospinal pathway. […] These days, determination of suitable biomarkers in ALS is an important issue for practical management of ALS, providing significant potential for diagnostics, prediction of disease course and optimisation of the therapeutic responses. […] Neurophysiological biomarkers of LMN dysfunction, including motor unit number estimation, the neurophysiological index, electrical impedance EMG and axonal excitability techniques, can be easily used to monitor the progression of ALS.

• #12 Advances in molecular pathology, diagnosis, and treatment of amyotrophic lateral sclerosis | The BMJ

  https://www.bmj.com/content/383/bmj-2023-075037

  Although El Escorial and Awaji criteria are useful in clinical research, they are hampered by the heterogeneity of ALS and do not capture the full disease spectrum. […] The ALS-frontotemporal spectrum diagnostic (ALS-FTSD) criteria proposed by Strong and colleagues use three diagnostic axes to define MND, cognitive and behavioral dysfunction, and other non-motor features. […] The recently proposed Gold Coast criteria have attempted to simplify the diagnosis and recognize the potential utility of the development of biomarkers; however, further validation in different populations will be needed before routine use in clinical care or research. […] Variability in rate of symptom progression and survival in ALS represents a major obstacle in clinical trials. […] Disease progression, most often measured by the decline in the revised ALS functional rating scale (ALSFRS-R) over time, differs considerably between patients, and survival ranges from less than one year to more than 10 years.

• #13 Breaking the amyotrophic lateral sclerosis early diagnostic barrier: the promise of general markers

  https://www.explorationpub.com/Journals/ent/Article/100465

  A series of criteria have been designed over the years in consensus meetings, regarding the patterns of UMN and LMN signs required for diagnostic certainty, together with the absence of features suggestive of other neurological disorders. These clinical criteria were revised to define more precisely the neurophysiological criteria for LMN signs. […] To facilitate the early diagnosis of ALS, an international consensus group proposed the Gold Coast criteria, which established an increased diagnostic sensitivity when compared with the previous criteria. However, effective markers can further facilitate the diagnosis, monitor the disease progression, and evaluate the therapeutic effects. In particular, the disease-specific features for early diagnosis assist ALS patients in receiving early intervention and prolonging their survival.

• #14 Advances in molecular pathology, diagnosis, and treatment of amyotrophic lateral sclerosis | The BMJ

  https://www.bmj.com/content/383/bmj-2023-075037

  Although El Escorial and Awaji criteria are useful in clinical research, they are hampered by the heterogeneity of ALS and do not capture the full disease spectrum. […] The ALS-frontotemporal spectrum diagnostic (ALS-FTSD) criteria proposed by Strong and colleagues use three diagnostic axes to define MND, cognitive and behavioral dysfunction, and other non-motor features. […] The recently proposed Gold Coast criteria have attempted to simplify the diagnosis and recognize the potential utility of the development of biomarkers; however, further validation in different populations will be needed before routine use in clinical care or research. […] Variability in rate of symptom progression and survival in ALS represents a major obstacle in clinical trials. […] Disease progression, most often measured by the decline in the revised ALS functional rating scale (ALSFRS-R) over time, differs considerably between patients, and survival ranges from less than one year to more than 10 years.

• #15 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Amyotrophic lateral sclerosis, known as ALS, can be hard to diagnose early because it can have symptoms similar to other diseases. Tests to rule out other conditions or help diagnose ALS might include: […] Electromyogram (EMG). A needle is inserted through the skin into various muscles. The test records the electrical activity of the muscles when they contract and when they’re at rest. This can determine if there is a problem with the muscles or nerves. […] Nerve conduction study. This study measures your nerves’ ability to send impulses to muscles in different areas of the body. This test can determine if you have nerve damage. EMG and nerve conduction studies are almost always done together. […] MRI. Using radio waves and a powerful magnetic field, an MRI produces detailed images of the brain and spinal cord. An MRI can reveal spinal cord tumors, herniated disks in the neck or other conditions that might be causing your symptoms. The highest resolution cameras may sometimes see ALS changes themselves.

• #16 Amyotrophic lateral sclerosis (ALS) – Diagnosis and Treatment

  https://www.uofmhealth.org/brain-neurological-conditions/als-diagnosis-treatment

  Diagnosing Amyotrophic Lateral Sclerosis (ALS) can be difficult because there is no single test or procedure to confirm the disease. Moreover, since many neurologic diseases cause similar symptoms, appropriate tests must be conducted to exclude the possibility of other conditions first. […] Diagnosing ALS may involve: […] Electrodiagnostic tests (EMG/NCS): Electomyography (EMG) and nerve conduction study (NCS) evaluates muscle and nerve functions. Specific abnormalities in the NCS and EMG may suggest, for example, that the individual has a form of peripheral neuropathy (damage to peripheral nerves) or myopathy (muscle disease) rather than ALS. […] Magnetic resonance imaging (MRI): A noninvasive procedure that uses a magnetic field and radio waves to take detailed images of the brain and spinal cord. […] Blood and urine studies […] Muscle biopsy.

• #17 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Amyotrophic lateral sclerosis, known as ALS, can be hard to diagnose early because it can have symptoms similar to other diseases. Tests to rule out other conditions or help diagnose ALS might include: […] Electromyogram (EMG). A needle is inserted through the skin into various muscles. The test records the electrical activity of the muscles when they contract and when they’re at rest. This can determine if there is a problem with the muscles or nerves. […] Nerve conduction study. This study measures your nerves’ ability to send impulses to muscles in different areas of the body. This test can determine if you have nerve damage. EMG and nerve conduction studies are almost always done together. […] MRI. Using radio waves and a powerful magnetic field, an MRI produces detailed images of the brain and spinal cord. An MRI can reveal spinal cord tumors, herniated disks in the neck or other conditions that might be causing your symptoms. The highest resolution cameras may sometimes see ALS changes themselves.

• #18 Amyotrophic Lateral Sclerosis (ALS) | National Institute of Neurological Disorders and Stroke

  https://www.ninds.nih.gov/health-information/disorders/amyotrophic-lateral-sclerosis-als

  It is important to get an accurate ALS diagnosis as soon as possible. ALS treatments may be most effective early in the course of the disease. A neurologist familiar with ALS can help a person get diagnosed early after symptom onset. […] There is no single test that can definitely diagnose ALS. A healthcare provider will conduct a physical exam and review the persons full medical history. A neurologic examination will test reflexes, muscle strength, and other responses. These tests should be performed at regular intervals to assess whether symptoms are getting worse over time. […] A healthcare provider may conduct muscle and imaging tests to rule out other diseases. This can help support an ALS diagnosis. These tests include: Electromyography (EMG) evaluates how well nerves and muscles are functioning. This test can include: A nerve conduction study (NCS) measures the electrical activity of nerves and muscles by assessing the nerve’s ability to send a signal along the nerve or to the muscle. A needle exam a recording technique that detects electrical activity in muscle fibers using a needle electrode.

• #19 Diagnostics of Amyotrophic Lateral Sclerosis: Up to Date

  https://pmc.ncbi.nlm.nih.gov/articles/PMC7913557/

  Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease characterized by gradual loss of upper and lower motor neurons and their pathways, usually without affecting the extraocular and sphincter muscles. […] The diagnosis of ALS is determined by excluding other conditions and utilizing clinical examinations, laboratory and genetic tests and nerve conduction/needle electromyography studies (EMG). […] Electromyography (EMG) and conduction studies are the basic aids in diagnosis and serve both to identify diseases that mimic ALS and to demonstrate the loss of motor units, which is the basic defining characteristic of the pathogenesis of ALS. […] The structure of the diagnostics of ALS is based on the revised El Escorial criteria. […] The diagnosis of ALS is consequential and must therefore be properly substantiated electrophysiologically, which requires the examination of a significant number of muscles.

• #20 Amyotrophic lateral sclerosis – Knowledge @ AMBOSS

  https://www.amboss.com/us/knowledge/amyotrophic-lateral-sclerosis/

  Perform a complete neurological examination, focusing on motor function. […] Obtain electrodiagnostic studies; to support the diagnosis in patients with suggestive clinical features. […] Obtain additional studies (e.g., neuroimaging; , vitamin B12) to exclude alternative causes of neuromuscular weakness. […] Consider a validated clinical tool to support the diagnosis (e.g., the Gold Coast diagnostic criteria). […] Progressive UMN signs and LMN signs without sensory function compromise strongly suggests ALS, but alternative diagnoses should be excluded. […] Electromyography: Findings must be confirmed in at least two muscular regions. […] Signs of denervation (e.g., fibrillations, positive sharp waves, fasciculations) […] Signs of reinnervation (e.g., large-amplitude complex motor unit action potentials).

• #21 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Amyotrophic lateral sclerosis, known as ALS, can be hard to diagnose early because it can have symptoms similar to other diseases. Tests to rule out other conditions or help diagnose ALS might include: […] Electromyogram (EMG). A needle is inserted through the skin into various muscles. The test records the electrical activity of the muscles when they contract and when they’re at rest. This can determine if there is a problem with the muscles or nerves. […] Nerve conduction study. This study measures your nerves’ ability to send impulses to muscles in different areas of the body. This test can determine if you have nerve damage. EMG and nerve conduction studies are almost always done together. […] MRI. Using radio waves and a powerful magnetic field, an MRI produces detailed images of the brain and spinal cord. An MRI can reveal spinal cord tumors, herniated disks in the neck or other conditions that might be causing your symptoms. The highest resolution cameras may sometimes see ALS changes themselves.

• #22 Diagnosing Amyotrophic Lateral Sclerosis | NYU Langone Health

  https://nyulangone.org/conditions/amyotrophic-lateral-sclerosis/diagnosis

  NYU Langone physicians take a compassionate and thorough approach to diagnosing amyotrophic lateral sclerosis (ALS), a rare condition that causes nerve cells in the brain and spinal cord to progressively deteriorate until the muscles no longer function. […] To diagnose ALS, an NYU Langone specialist first asks about your medical history and performs a physical exam to obtain a complete picture of your health. The doctor looks for weakness in the muscles of the face, arms, or legs, as well as visible twitching of muscles. […] Your doctor may also order additional tests to confirm a diagnosis, including one or more of the following: […] Your doctor may perform electrical testing of the body’s nerve functions to aid in the diagnosis of ALS. Electromyography tests how the nerves and muscles work together by measuring electrical impulses along nerves, nerve roots, and muscle tissue.

• #23 Amyotrophic Lateral Sclerosis: Disease State Overview

  https://www.ajmc.com/view/amyotrophic-lateral-sclerosis-disease-state-overview

  Amyotrophic lateral sclerosis (ALS) is a disease that results in the progressive deterioration and loss of function of the motor neurons in the brain and spinal cord, leading to paralysis. […] Diagnosis is determined by excluding other conditions and utilizing clinical examinations, laboratory tests, and nerve conduction/electromyography studies. […] Diagnosis is primarily determined by clinical examination coupled with nerve conduction studies (NCSs), electromyography (EMG), and laboratory testing. […] NCSs tend to be normal or slightly abnormal with an absence of motor conduction block in patients with ALS. […] The presence of motor conduction block excludes an ALS diagnosis. […] Moreover, sensory nerve action potentials (SNAPs) tend to be normal in patients with ALS. […] The use of needle EMG tests for acute and chronic denervation may lead to a diagnosis even before evident clinical onset.

• #24 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Amyotrophic lateral sclerosis, known as ALS, can be hard to diagnose early because it can have symptoms similar to other diseases. Tests to rule out other conditions or help diagnose ALS might include: […] Electromyogram (EMG). A needle is inserted through the skin into various muscles. The test records the electrical activity of the muscles when they contract and when they’re at rest. This can determine if there is a problem with the muscles or nerves. […] Nerve conduction study. This study measures your nerves’ ability to send impulses to muscles in different areas of the body. This test can determine if you have nerve damage. EMG and nerve conduction studies are almost always done together. […] MRI. Using radio waves and a powerful magnetic field, an MRI produces detailed images of the brain and spinal cord. An MRI can reveal spinal cord tumors, herniated disks in the neck or other conditions that might be causing your symptoms. The highest resolution cameras may sometimes see ALS changes themselves.

• #25 Amyotrophic Lateral Sclerosis (ALS) | Lou Gehrig’s Disease | Mercy Health

  https://www.mercy.com/health-care-services/neurology/conditions/amyotrophic-lateral-sclerosis

  If your primary care doctor suspects you have ALS, he or she will refer you to a neurologist for diagnosis and treatment. […] Because there are no specific tests to diagnose ALS, diagnosis can take months or years as your doctor evaluates the progression of your symptoms. During the diagnosis period, your doctor will monitor the state of your neuromuscular function. […] Because ALS symptoms can mimic other conditions, your doctor may order diagnostic testing such as: […] Electromyogram (EMG) – an EMG can evaluate the electrical activity in your brain to determine if you have ALS or another nerve issue that is causing your symptoms. […] Nerve conduction study (NCV) – a nerve conduction study may be done if your doctor suspects nerve damage. […] MRI (magnetic resonance imaging) – an MRI can take images of your brain and spinal cord to determine if you have tumors or other conditions that may be causing your symptoms.

• #26 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Amyotrophic lateral sclerosis, known as ALS, can be hard to diagnose early because it can have symptoms similar to other diseases. Tests to rule out other conditions or help diagnose ALS might include: […] Electromyogram (EMG). A needle is inserted through the skin into various muscles. The test records the electrical activity of the muscles when they contract and when they’re at rest. This can determine if there is a problem with the muscles or nerves. […] Nerve conduction study. This study measures your nerves’ ability to send impulses to muscles in different areas of the body. This test can determine if you have nerve damage. EMG and nerve conduction studies are almost always done together. […] MRI. Using radio waves and a powerful magnetic field, an MRI produces detailed images of the brain and spinal cord. An MRI can reveal spinal cord tumors, herniated disks in the neck or other conditions that might be causing your symptoms. The highest resolution cameras may sometimes see ALS changes themselves.

• #27 Amyotrophic lateral sclerosis (ALS) – Diagnosis and Treatment

  https://www.uofmhealth.org/brain-neurological-conditions/als-diagnosis-treatment

  Diagnosing Amyotrophic Lateral Sclerosis (ALS) can be difficult because there is no single test or procedure to confirm the disease. Moreover, since many neurologic diseases cause similar symptoms, appropriate tests must be conducted to exclude the possibility of other conditions first. […] Diagnosing ALS may involve: […] Electrodiagnostic tests (EMG/NCS): Electomyography (EMG) and nerve conduction study (NCS) evaluates muscle and nerve functions. Specific abnormalities in the NCS and EMG may suggest, for example, that the individual has a form of peripheral neuropathy (damage to peripheral nerves) or myopathy (muscle disease) rather than ALS. […] Magnetic resonance imaging (MRI): A noninvasive procedure that uses a magnetic field and radio waves to take detailed images of the brain and spinal cord. […] Blood and urine studies […] Muscle biopsy.

• #28 Amyotrophic Lateral Sclerosis Workup: Approach Considerations, Needle Electromyography and Nerve Conduction Studies, Laboratory Studies

  https://emedicine.medscape.com/article/1170097-workup

  Genetic testing may be performed to identify genetic defects in some familial types of ALS, as well as other inherited motor neuron diseases. […] The role of genetic testing in patients with sporadic disease has been debated among ALS experts. […] Patients with sporadic disease who are considering genetic testing should take the time, through genetic counseling, to study the implications for themselves and for their first-degree relatives. […] In some centers, genetic testing is routine for all patients with ALS. […] Muscle biopsy is needed only rarely but may be considered if the presentation of ALS is atypical. […] Brain or spinal MRI may be done to rule out structural lesions and neurologic conditions that sometimes account for early clinical features seen in patients suspected of having ALS (eg, multiple sclerosis, brainstem strokes, tumors, spinal radiculopathy). Results of these studies generally are normal in patients with ALS.

• #29 Amyotrophic Lateral Sclerosis (ALS) > Fact Sheets > Yale Medicine

  https://www.yalemedicine.org/conditions/amyotrophic-lateral-sclerosis

  How is ALS diagnosed? […] There is no single test for ALS. Diagnosis involves assessing the patient’s medical history, conducting a physical examination, and performing various tests to exclude other possible causes of the symptoms. A number of diagnostic tests are helpful in supporting an ALS diagnosis, including electromyography (EMG), magnetic resonance imaging (MRI), blood tests, and genetic tests. […] A number of diagnostic tests are helpful in supporting an ALS diagnosis and ruling out other possible causes of symptoms such as myasthenia gravis, primary lateral sclerosis, infections such as HIV or Lyme disease, hyperthyroidism, and compression of the cervical (neck region) spinal cord, among many others. Diagnostic tests may include: […] Electromyography (EMG) to measure the electrical activity of a muscle. For this test, a needle electrode is inserted through the skin into various muscles. The needle records the electrical activity of the muscles when they contract and when they’re at rest. People may feel some pain or discomfort during the test.

• #30 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Amyotrophic lateral sclerosis, known as ALS, can be hard to diagnose early because it can have symptoms similar to other diseases. Tests to rule out other conditions or help diagnose ALS might include: […] Electromyogram (EMG). A needle is inserted through the skin into various muscles. The test records the electrical activity of the muscles when they contract and when they’re at rest. This can determine if there is a problem with the muscles or nerves. […] Nerve conduction study. This study measures your nerves’ ability to send impulses to muscles in different areas of the body. This test can determine if you have nerve damage. EMG and nerve conduction studies are almost always done together. […] MRI. Using radio waves and a powerful magnetic field, an MRI produces detailed images of the brain and spinal cord. An MRI can reveal spinal cord tumors, herniated disks in the neck or other conditions that might be causing your symptoms. The highest resolution cameras may sometimes see ALS changes themselves.

• #31 Amyotrophic Lateral Sclerosis (ALS) | National Institute of Neurological Disorders and Stroke

  https://www.ninds.nih.gov/health-information/disorders/amyotrophic-lateral-sclerosis-als

  Blood and urine tests may be performed based on the persons symptoms, test results, and findings from a neurological exam. In some cases, a spinal tap (lumbar puncture) may be performed to obtain the fluid that surrounds the brain and spinal cord called cerebrospinal fluid (CSF) for additional testing. A physician may order these tests to eliminate the possibility of other diseases. A muscle biopsy may be performed to help determine whether the person may have a muscle disease other than ALS. […] There is no treatment to reverse damage to motor neurons or cure ALS at this time. However, some treatments may slow progression of the disease, improve quality of life, and extend survival. New treatments have become available in the past several years, and researchers continue to explore diverse avenues to slow or stop progression of ALS.

• #32 ALS diagnosis: Tests and treatment plan

  https://www.medicalnewstoday.com/articles/als-diagnosis

  Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease affecting the nerve cells in the brain. An ALS diagnosis usually involves various tests, including testing the nerves, blood tests, spinal tap, X-rays, and neurological exams. […] There is no single test for an ALS diagnosis, so usually, the doctor begins by requesting a medical history and performing a physical exam to look for signs of nerve damage and muscular weakness. […] To reach an ALS diagnosis, medical professionals typically need to conduct a comprehensive clinical examination and order a series of tests to definitively rule out any other conditions that they may mistake for ALS. […] Electromyography (EMG) and nerve conduction velocity (NCV) tests are important in diagnosing ALS. […] Blood tests help doctors rule out other possible causes of symptoms, such as hyperparathyroidism, infections, or toxicities.

• #33 Amyotrophic Lateral Sclerosis (ALS) > Fact Sheets > Yale Medicine

  https://www.yalemedicine.org/conditions/amyotrophic-lateral-sclerosis

  Magnetic resonance imaging (MRI) of the brain or spinal cord can help rule out other conditions such as structural problems or inflammatory disorders of the neck that can cause symptoms similar to those of ALS. […] Blood and urine tests help rule out thyroid problems, Lyme disease, HIV, and other conditions and detect any issues related to ALS. […] Genetic testing may be recommended for patients with a family history of ALS to determine if they carry a gene that causes ALS.

• #34 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Amyotrophic lateral sclerosis, known as ALS, can be hard to diagnose early because it can have symptoms similar to other diseases. Tests to rule out other conditions or help diagnose ALS might include: […] Electromyogram (EMG). A needle is inserted through the skin into various muscles. The test records the electrical activity of the muscles when they contract and when they’re at rest. This can determine if there is a problem with the muscles or nerves. […] Nerve conduction study. This study measures your nerves’ ability to send impulses to muscles in different areas of the body. This test can determine if you have nerve damage. EMG and nerve conduction studies are almost always done together. […] MRI. Using radio waves and a powerful magnetic field, an MRI produces detailed images of the brain and spinal cord. An MRI can reveal spinal cord tumors, herniated disks in the neck or other conditions that might be causing your symptoms. The highest resolution cameras may sometimes see ALS changes themselves.

• #35 ALS: Improving diagnosis and management with new blood test • healthcare-in-europe.com

  https://healthcare-in-europe.com/en/news/als-diagnosis-management-nfl-blood-test.html

  Amyotrophic lateral sclerosis (ALS) can sometimes be difficult to diagnose or to predict how quickly the disease is likely to progress. A new study helps determine which blood tests are best at identifying and monitoring ALS. […] Having an effective biomarker can be highly valuable in addition to helping in making the diagnosis, it can help in predicting prognosis, evaluating what stage of the disease people are in, and tracking their progress or their response to treatments, said study author Sylvain Lehmann, MD, PhD, of the Inserm Hospital and University of Montpellier in France. […] The study found that the neurofilament light chain tests correctly identified the people with ALS more than 80% of the time. The accuracy of diagnosis for the glial acidic protein and phosphorylated tau 181 tests was poor, with accurate results around 50% of the time. […] The researchers also identified a level of neurofilament light chain protein that can help predict survival for people with ALS. Within a year, more than 40% of people with protein levels below that point were still alive, while none of the people with levels above that point were still alive.

• #36 Azthena logo with the word Azthena

  https://www.news-medical.net/news/20250226/New-study-identifies-effective-blood-tests-for-ALS-diagnosis-and-monitoring.aspx

  ALS, or amyotrophic lateral sclerosis, can sometimes be difficult to diagnose or to predict how quickly the disease is likely to progress. A new study helps determine which blood tests are best at identifying and monitoring ALS. […] The study found that the neurofilament light chain tests correctly identified the people with ALS more than 80% of the time. The accuracy of diagnosis for the glial acidic protein and phosphorylated tau 181 tests was poor, with accurate results around 50% of the time. […] The researchers also identified a level of neurofilament light chain protein that can help predict survival for people with ALS. Within a year, more than 40% of people with protein levels below that point were still alive, while none of the people with levels above that point were still alive.

• #37 Fluid biomarkers for amyotrophic lateral sclerosis: a review | Molecular Neurodegeneration | Full Text

  https://molecularneurodegeneration.biomedcentral.com/articles/10.1186/s13024-023-00685-6

  Neurofilament concentrations may additionally show differential diagnostic potential in clinically relevant situations such as distinguishing ALS from ALS mimic syndromes, a heterogeneous group of conditions with clinical features that initially resemble ALS. […] These data suggest that fluid neurofilament concentrations may facilitate a more rapid and accurate ALS diagnosis. […] The prognostic utility of neurofilaments, however, would be greatest when their levels are measured early in established disease. […] The rise in neurofilaments prior to ALS symptom onset is not unique to individuals with fALS. […] Findings from the prospective longitudinal studies above provide insight as to when, in the natural history of fALS, neurofilament concentrations rise. […] Neurofilaments may also serve as pharmacodynamic biomarkers in that decreases in CSF or blood neurofilaments in response to potential therapeutics could indicate biological activity of the drug being tested. […] While TDP-43 seems a likely biomarker candidate due to the centrality of TDP-43 pathology in ALS, these efforts have faced several limitations.

• #38 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Blood and urine tests. Analyzing samples of your blood and urine in the laboratory might help eliminate other possible causes of your symptoms. Serum neurofilament light levels, which are measured from blood samples, are generally high in people with ALS. The test can help make a diagnosis early in the disease. […] Spinal tap, known as a lumbar puncture. This involves removing a sample of spinal fluid for laboratory testing. Spinal fluid is removed using a small needle inserted between two bones in the lower back. The spinal fluid appears typical in people with ALS but may uncover another cause of symptoms. […] Muscle biopsy. If your health care provider believes you may have a muscle disease rather than ALS, you might undergo a muscle biopsy. While you’re under local anesthesia, a small piece of muscle is removed and sent to a lab for analysis.

• #39 Amyotrophic Lateral Sclerosis (ALS) | National Institute of Neurological Disorders and Stroke

  https://www.ninds.nih.gov/health-information/disorders/amyotrophic-lateral-sclerosis-als

  Blood and urine tests may be performed based on the persons symptoms, test results, and findings from a neurological exam. In some cases, a spinal tap (lumbar puncture) may be performed to obtain the fluid that surrounds the brain and spinal cord called cerebrospinal fluid (CSF) for additional testing. A physician may order these tests to eliminate the possibility of other diseases. A muscle biopsy may be performed to help determine whether the person may have a muscle disease other than ALS. […] There is no treatment to reverse damage to motor neurons or cure ALS at this time. However, some treatments may slow progression of the disease, improve quality of life, and extend survival. New treatments have become available in the past several years, and researchers continue to explore diverse avenues to slow or stop progression of ALS.

• #40 Amyotrophic Lateral Sclerosis (ALS) | Cedars-Sinai

  https://www.cedars-sinai.org/health-library/diseases-and-conditions/a/amyotrophic-lateral-sclerosis-als.html

  There is no specific test to diagnose ALS. Your healthcare provider will consider your health history and symptoms. You will also have tests to rule out other conditions, such as: […] Electrodiagnostic tests, such as electromyography and nerve conduction study. These studies evaluate and diagnose disorders of the nerves, muscles, and motor neurons. Your healthcare provider inserts electrodes into the muscle or places them on the skin overlying a muscle, a nerve, or muscle group to record electrical activity and muscle responses. […] In some cases, other tests may be needed due to atypical features of ALS, such as: […] Muscle or nerve biopsy. In this procedure, your healthcare provider removes a sample of tissue or cells from the body and examines it under a microscope. […] Spinal tap (lumbar puncture). In this test, your healthcare provider places a special needle into the lower back, into the area around the spinal cord. There they can measure the pressure in the spinal canal and brain. Your healthcare provider will remove a small amount of cerebrospinal fluid (CSF) and test it for an infection or other problems. CSF is the fluid that bathes the brain and spinal cord.

• #41 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Blood and urine tests. Analyzing samples of your blood and urine in the laboratory might help eliminate other possible causes of your symptoms. Serum neurofilament light levels, which are measured from blood samples, are generally high in people with ALS. The test can help make a diagnosis early in the disease. […] Spinal tap, known as a lumbar puncture. This involves removing a sample of spinal fluid for laboratory testing. Spinal fluid is removed using a small needle inserted between two bones in the lower back. The spinal fluid appears typical in people with ALS but may uncover another cause of symptoms. […] Muscle biopsy. If your health care provider believes you may have a muscle disease rather than ALS, you might undergo a muscle biopsy. While you’re under local anesthesia, a small piece of muscle is removed and sent to a lab for analysis.

• #42 Amyotrophic Lateral Sclerosis (ALS) | National Institute of Neurological Disorders and Stroke

  https://www.ninds.nih.gov/health-information/disorders/amyotrophic-lateral-sclerosis-als

  Blood and urine tests may be performed based on the persons symptoms, test results, and findings from a neurological exam. In some cases, a spinal tap (lumbar puncture) may be performed to obtain the fluid that surrounds the brain and spinal cord called cerebrospinal fluid (CSF) for additional testing. A physician may order these tests to eliminate the possibility of other diseases. A muscle biopsy may be performed to help determine whether the person may have a muscle disease other than ALS. […] There is no treatment to reverse damage to motor neurons or cure ALS at this time. However, some treatments may slow progression of the disease, improve quality of life, and extend survival. New treatments have become available in the past several years, and researchers continue to explore diverse avenues to slow or stop progression of ALS.

• #43 Amyotrophic Lateral Sclerosis (ALS) | Cedars-Sinai

  https://www.cedars-sinai.org/health-library/diseases-and-conditions/a/amyotrophic-lateral-sclerosis-als.html

  There is no specific test to diagnose ALS. Your healthcare provider will consider your health history and symptoms. You will also have tests to rule out other conditions, such as: […] Electrodiagnostic tests, such as electromyography and nerve conduction study. These studies evaluate and diagnose disorders of the nerves, muscles, and motor neurons. Your healthcare provider inserts electrodes into the muscle or places them on the skin overlying a muscle, a nerve, or muscle group to record electrical activity and muscle responses. […] In some cases, other tests may be needed due to atypical features of ALS, such as: […] Muscle or nerve biopsy. In this procedure, your healthcare provider removes a sample of tissue or cells from the body and examines it under a microscope. […] Spinal tap (lumbar puncture). In this test, your healthcare provider places a special needle into the lower back, into the area around the spinal cord. There they can measure the pressure in the spinal canal and brain. Your healthcare provider will remove a small amount of cerebrospinal fluid (CSF) and test it for an infection or other problems. CSF is the fluid that bathes the brain and spinal cord.

• #44 Amyotrophic Lateral Sclerosis Workup: Approach Considerations, Needle Electromyography and Nerve Conduction Studies, Laboratory Studies

  https://emedicine.medscape.com/article/1170097-workup

  Genetic testing may be performed to identify genetic defects in some familial types of ALS, as well as other inherited motor neuron diseases. […] The role of genetic testing in patients with sporadic disease has been debated among ALS experts. […] Patients with sporadic disease who are considering genetic testing should take the time, through genetic counseling, to study the implications for themselves and for their first-degree relatives. […] In some centers, genetic testing is routine for all patients with ALS. […] Muscle biopsy is needed only rarely but may be considered if the presentation of ALS is atypical. […] Brain or spinal MRI may be done to rule out structural lesions and neurologic conditions that sometimes account for early clinical features seen in patients suspected of having ALS (eg, multiple sclerosis, brainstem strokes, tumors, spinal radiculopathy). Results of these studies generally are normal in patients with ALS.

• #45 Amyotrophic Lateral Sclerosis (ALS) > Fact Sheets > Yale Medicine

  https://www.yalemedicine.org/conditions/amyotrophic-lateral-sclerosis

  Magnetic resonance imaging (MRI) of the brain or spinal cord can help rule out other conditions such as structural problems or inflammatory disorders of the neck that can cause symptoms similar to those of ALS. […] Blood and urine tests help rule out thyroid problems, Lyme disease, HIV, and other conditions and detect any issues related to ALS. […] Genetic testing may be recommended for patients with a family history of ALS to determine if they carry a gene that causes ALS.

• #46 ALS: Symptoms & Causes | University of Utah Health

  https://healthcare.utah.edu/neurosciences/neurology/motor-neuron-disorders/als

  Mutations (changes) in more than 40 genes can cause ALS or increase your risk of developing the disease. Genetic testing looks for mutations linked to ALS. Genetic testing is an option for anyone who has received an ALS diagnosis. […] If you have ALS, genetic testing could answer questions to help you better understand your condition: Why you got the disease, If your family members are at higher risk of developing ALS. […] If you have a genetic mutation linked to ALS, you may be able to start a medication or participate in ongoing clinical trials. These medications and trials evaluate treatments that target specific genes. […] Researchers are still seeking treatment options for ALS. Current treatments cannot cure ALS but may help in other ways: Slow down the disease, Prevent complications, Make people with ALS more comfortable and independent.

• #47 Amyotrophic lateral sclerosis (ALS) – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/amyotrophic-lateral-sclerosis/diagnosis-treatment/drc-20354027

  Nerve biopsy. If your health care provider believes you may have a nerve disease rather than ALS, you might undergo a nerve biopsy. While you’re under local anesthesia, a small piece of nerve is removed and sent to a lab for analysis. […] Your primary care provider may be the first to recognize the symptoms of ALS. Your provider will likely refer you to a doctor trained in nervous system conditions, known as a neurologist, to establish a diagnosis. […] Your primary care provider will likely review your family’s medical history and your symptoms. Your neurologist and your primary care provider might conduct a physical and neurological exam. This might include testing your: […] Reflexes. […] Muscle strength. […] Muscle tone. […] Senses of touch and sight. […] Coordination. […] Balance.

• #48 Amyotrophic Lateral Sclerosis Clinical Presentation: History, Physical Examination, Diagnostic Criteria

  https://emedicine.medscape.com/article/1170097-clinical

  The diagnosis of amyotrophic lateral sclerosis (ALS) is primarily clinical. When the disease has progressed far in its course and involves many parts of the body, the patients appearance and the findings on the neurologic examination may provide sufficient evidence for the diagnosis. When a patient presents with the first symptoms, however, making the diagnosis is not straightforward. […] ALS may be suspected whenever an individual develops insidious loss of function or gradual, slowly progressive, painless weakness in 1 or more regions of the body, without changes in the ability to feel, and no other cause is immediately evident. […] In 7580% of patients, symptoms begin with limb involvement, while 2025% of patients present with bulbar symptoms. […] The diagnosis of ALS requires the presence of the following: Signs of lower motor neuron (LMN) degeneration by clinical, electrophysiological or neuropathologic examination, Signs of upper motor neuron (UMN) degeneration by clinical examination, and Progressive spread of signs within a region or to other regions, together with the absence of: Electrophysiological evidence of other disease processes that might explain the signs of LMN and/or UMN degenerations; and Neuroimaging evidence of other disease processes that might explain the observed clinical and electrophysiological signs. […] The Awaji criteria consider equally the clinical and neurophysiological evidence of LMN involvement. […] In summary, earlier diagnosis of ALS is possible today in individual cases, relative to years past, if alternative causes for early, limited, progressive disease are excluded.

• #49 How ALS Is Diagnosed I Massachusetts General Hospital

  https://www.massgeneral.org/neurology/als/patient-education/diagnosing-als

  A patient undergoing a comprehensive ALS examination at Mass General. […] ALS, or amyotrophic lateral sclerosis, also known as Lou Gehrigs disease, is a neuromuscular disorder affecting motor neurons. […] An appointment with a primary care physician (PCP) is often the best first step to understanding changes in health and the resulting symptoms. […] If ALS is suspected, a PCP will typically refer their patient to a neurologist for further evaluation. […] A neurologist will perform a detailed physical examination that focuses on muscle strength, reflexes, coordination, and sensation. […] Even if other disorders are ruled out, it may still be difficult to definitely determine a diagnosis of ALS. […] To do so, they will review the results from the previously performed tests. […] The diagnosing ALS process begins with an examination by a neurologist.

• #50 Amyotrophic lateral sclerosis – Symptoms, diagnosis and treatment | BMJ Best Practice

  https://bestpractice.bmj.com/topics/en-gb/330

  Amyotrophic lateral sclerosis (ALS) is a progressive disease characterised by degeneration of motor neurons with cortical, brainstem, and ventral cord locations. […] ALS usually presents as a combination of upper motor neuron and lower motor neuron symptoms and signs, involving initially one segment of the neuroaxis (i.e., cranial, cervical, thoracic, or lumbosacral), and then progressively spreading, typically to contiguous areas. […] There is no cure for ALS. The focus of medical care is to provide supportive and palliative interventions, aiming to optimise the patient’s quality of life. Riluzole prolongs survival and should be offered to patients at the time of diagnosis. […] Key diagnostic factors include presence of risk factors, upper extremity weakness, stiffness, with poor co-ordination and balance, spastic, unsteady gait, painful muscle spasms, difficulties in arising from chairs and climbing stairs, foot drop, stiffness and decreased balance with impact on gait, head drop, progressive difficulties in maintaining erect posture, with stooping, muscle atrophy, increased lumbar lordosis and tendency for abdominal protuberance, hyper-reflexia, dyspnoea, coughing and choking on liquids (including secretions) and eventually on food, strained, slow speech, slurred, nasal, and, at times, dysphonic speech, hypophonic speech.

• #51 Amyotrophic Lateral Sclerosis (ALS) | National Institute of Neurological Disorders and Stroke

  https://www.ninds.nih.gov/health-information/disorders/amyotrophic-lateral-sclerosis-als

  It is important to get an accurate ALS diagnosis as soon as possible. ALS treatments may be most effective early in the course of the disease. A neurologist familiar with ALS can help a person get diagnosed early after symptom onset. […] There is no single test that can definitely diagnose ALS. A healthcare provider will conduct a physical exam and review the persons full medical history. A neurologic examination will test reflexes, muscle strength, and other responses. These tests should be performed at regular intervals to assess whether symptoms are getting worse over time. […] A healthcare provider may conduct muscle and imaging tests to rule out other diseases. This can help support an ALS diagnosis. These tests include: Electromyography (EMG) evaluates how well nerves and muscles are functioning. This test can include: A nerve conduction study (NCS) measures the electrical activity of nerves and muscles by assessing the nerve’s ability to send a signal along the nerve or to the muscle. A needle exam a recording technique that detects electrical activity in muscle fibers using a needle electrode.

• #52 Understanding the Symptoms of ALS, or Lou Gehrig’s Disease

  https://www.webmd.com/brain/understanding-als-symptoms

  Nerve conduction study. This measures how well your nerves send signals. […] Muscle biopsy. It involves taking a small sample of your muscle tissue You will be given something to numb the area before biopsy. You may have to take this test if your doctor thinks you have a muscle disease other than ALS. […] Second opinions […] Theres no single test that can give you and your doctor a certain diagnosis of ALS. […] Because of this, many patients like to look for a second opinion after getting an ALS diagnosis. A second neurologist may do a different round of tests that can show something new. […] Proof of progression […] Part of the definition of ALS is that its a progressive disease that means it gets worse over time. […] So, once you have your first diagnosis of ALS, your doctor will likely recommend repeating all the tests in 6 or more months to see whether your disease has changed at all. […] If the tests show a worsening of the symptoms and muscle and nerve function, your diagnosis probably will be confirmed.

• #53 Diagnostic dilemma of amyotrophic lateral sclerosis (ALS): insights from the first ALS specialized clinic in Egypt | The Egyptian Journal of Neurology, Psychiatry and Neurosurgery | Full Text

  https://ejnpn.springeropen.com/articles/10.1186/s41983-020-00203-1

  Amyotrophic lateral sclerosis (ALS) diagnosis could be challenging in some cases and a thorough workup should be done to rule out ALS mimics. Thus, diagnosis should be made by an experienced neurologist and should be regularly reviewed. […] The aim of the current study is to screen the ALS patient cohort by a retrospective analysis if there were any ALS mimics that were misdiagnosed. […] Diagnosis of ALS was made based on El Escorial revised criteria. […] After ruling out ALS mimics, ALS diagnosis was coined to 24 patients only (80%). […] Six patients (20%) were confirmed to have other disorders (ALS mimic disorders); the percentage of ALS mimics in our study is higher than that reported in previous studies. […] MMN was the most common ALS mimic syndrome in accordance with the study of.

• #54 Diagnostic dilemma of amyotrophic lateral sclerosis (ALS): insights from the first ALS specialized clinic in Egypt | The Egyptian Journal of Neurology, Psychiatry and Neurosurgery | Full Text

  https://ejnpn.springeropen.com/articles/10.1186/s41983-020-00203-1

  Differentiation between ALS and its mimics is important in the early stages because some ALS-mimicking disorders have a better prognosis and are curable. Of the ALS-mimicking disorders, MMN is the most common diagnosis mistaken for ALS. Other mimicking disorders are cervical myelopathy, mesothelioma, and celiac disease. Therefore, diagnosing ALS should not be made unless other disorders are ruled out by clinical, radiological, laboratory, and electrophysiological tests.

• #55 Pathogenesis and Presentation of ALS: Examining Reasons for Delayed Diagnosis and Identifying Opportunities for Improvement

  https://www.ajmc.com/view/pathogenesis-and-presentation-of-als-examining-reasons-for-delayed-diagnosis-and-identifying-opportunities-for-improvement

  Variability in the ALS disease course and lack of diagnostic biomarkers makes absolute diagnosis challenging for non-ALS specialists. […] Lack of reliable, accessible biomarkers contributes to diagnostic delays. […] Misdiagnosing a patient with ALS can also have devastating consequences. […] The ALS Association recommends that a person diagnosed with ALS seek a second opinion from a neurologist specializing in ALS.

• #56 Amyotrophic Lateral Sclerosis (ALS) > Fact Sheets > Yale Medicine

  https://www.yalemedicine.org/conditions/amyotrophic-lateral-sclerosis

  How is ALS diagnosed? […] There is no single test for ALS. Diagnosis involves assessing the patient’s medical history, conducting a physical examination, and performing various tests to exclude other possible causes of the symptoms. A number of diagnostic tests are helpful in supporting an ALS diagnosis, including electromyography (EMG), magnetic resonance imaging (MRI), blood tests, and genetic tests. […] A number of diagnostic tests are helpful in supporting an ALS diagnosis and ruling out other possible causes of symptoms such as myasthenia gravis, primary lateral sclerosis, infections such as HIV or Lyme disease, hyperthyroidism, and compression of the cervical (neck region) spinal cord, among many others. Diagnostic tests may include: […] Electromyography (EMG) to measure the electrical activity of a muscle. For this test, a needle electrode is inserted through the skin into various muscles. The needle records the electrical activity of the muscles when they contract and when they’re at rest. People may feel some pain or discomfort during the test.

• #57 How ALS Is Diagnosed I Massachusetts General Hospital

  https://www.massgeneral.org/neurology/als/patient-education/diagnosing-als

  A patient undergoing a comprehensive ALS examination at Mass General. […] ALS, or amyotrophic lateral sclerosis, also known as Lou Gehrigs disease, is a neuromuscular disorder affecting motor neurons. […] An appointment with a primary care physician (PCP) is often the best first step to understanding changes in health and the resulting symptoms. […] If ALS is suspected, a PCP will typically refer their patient to a neurologist for further evaluation. […] A neurologist will perform a detailed physical examination that focuses on muscle strength, reflexes, coordination, and sensation. […] Even if other disorders are ruled out, it may still be difficult to definitely determine a diagnosis of ALS. […] To do so, they will review the results from the previously performed tests. […] The diagnosing ALS process begins with an examination by a neurologist.

• #58 Diagnosis – Amyotrophic Lateral Sclerosis (ALS) – Diseases | Muscular Dystrophy Association

  https://www.mda.org/disease/amyotrophic-lateral-sclerosis/diagnosis

  Additional tests may include imaging of the spinal cord and brain, usually by MRI (magnetic resonance imaging), and sometimes a test of the fluid surrounding the spinal cord (spinal tap or lumbar puncture), which involves inserting a needle into the back between two lower vertebrae. […] Some evidence suggest that ultrasound of the muscles can detect fasciculations that can aid in the diagnosis of ALS. […] Blood tests to exclude disorders that mimic ALS are also performed. In some instances, a muscle biopsy, which involves taking a small sample of muscle under local anesthesia, is performed. […] In some cases, genetic tests (performed on a blood sample) can confirm the diagnosis. […] However, the diagnosis of ALS is often a rule-out procedure. This means ALS is diagnosed after all other possibilities have been ruled out by specific tests. […] If your condition has been diagnosed as ALS outside a major medical center or without extensive testing, it may be worth getting a second opinion. […] MDA Care Centers are staffed by professionals who are highly skilled at diagnosing ALS and the conditions that resemble it.

• #59 Medical Management – Amyotrophic Lateral Sclerosis (ALS) – Diseases | Muscular Dystrophy Association

  https://www.mda.org/disease/amyotrophic-lateral-sclerosis/medical-management

  In October 2009, the American Academy of Neurology (AAN) released revised physician guidelines for medical management of ALS. The guidelines include information about drug, nutritional, and respiratory therapies; multidisciplinary care; symptom management; and cognitive/behavioral impairment. […] Shortly after an ALS diagnosis is made, many specialists recommend a breathing test called a forced vital capacity (FVC) and other pulmonary function tests (PFTs). […] The AAN guidelines found that visiting a multidisciplinary ALS clinic (one with many types of health professionals, such as an MDA/ALS Care Center) can help people with ALS get the best possible care. The evidence showed that people with ALS who get care at a multidisciplinary clinic live longer and may have a better quality of life than those who do not.

• #60 Pathogenesis and Presentation of ALS: Examining Reasons for Delayed Diagnosis and Identifying Opportunities for Improvement

  https://www.ajmc.com/view/pathogenesis-and-presentation-of-als-examining-reasons-for-delayed-diagnosis-and-identifying-opportunities-for-improvement

  The initial onset of focal weakness in ALS is subtle, but it spreads relentlessly to affect most muscles. […] The diseases heterogeneity complicates and often delays diagnosis, with devastating burden and quality of life (QOL) impact. […] ALS diagnosis is based primarily on clinical signs and symptoms and exclusion of other causes for LMN and UMN dysfunction. […] The disease course must also be progressive with no reasonable differential diagnosis. […] Standard diagnostic criteria for ALS are lacking, which may amplify diagnostic delays, misdiagnosis, and potentially worsen prognosis. […] Early ALS diagnosis and referral to a multidisciplinary specialized center are vital to improve outcomes, but diagnostic delays are common. […] Identified reasons for this delay included patient awareness, referrals to specialists, misdiagnosis, site of disease onset, age of onset, and neurological comorbidities.

• #61 Medical Management – Amyotrophic Lateral Sclerosis (ALS) – Diseases | Muscular Dystrophy Association

  https://www.mda.org/disease/amyotrophic-lateral-sclerosis/medical-management

  In October 2009, the American Academy of Neurology (AAN) released revised physician guidelines for medical management of ALS. The guidelines include information about drug, nutritional, and respiratory therapies; multidisciplinary care; symptom management; and cognitive/behavioral impairment. […] Shortly after an ALS diagnosis is made, many specialists recommend a breathing test called a forced vital capacity (FVC) and other pulmonary function tests (PFTs). […] The AAN guidelines found that visiting a multidisciplinary ALS clinic (one with many types of health professionals, such as an MDA/ALS Care Center) can help people with ALS get the best possible care. The evidence showed that people with ALS who get care at a multidisciplinary clinic live longer and may have a better quality of life than those who do not.

• #62 What doctors wish patients knew about amyotrophic lateral sclerosis | American Medical Association

  https://www.ama-assn.org/delivering-care/population-care/what-doctors-wish-patients-knew-about-amyotrophic-lateral-sclerosis

  There is a very well-structured system in the U.S. and many parts of the world known as multidisciplinary ALS clinics, effectively a one-stop-shop, Dr. Sabouri said. […] While there is no cure for ALS, the main management is lifestyle modification, so things like exercise, Dr. Hakimi said. […] Consult with your neurologist or multidisciplinary clinic team before making any significant health-related decisions. […] Its obviously extremely emotionally taxing recognizing that somebody is going to get worse as time goes on regardless of what you do for them, Dr. Hakimi said.

• #63 Medical Management – Amyotrophic Lateral Sclerosis (ALS) – Diseases | Muscular Dystrophy Association

  https://www.mda.org/disease/amyotrophic-lateral-sclerosis/medical-management

  In October 2009, the American Academy of Neurology (AAN) released revised physician guidelines for medical management of ALS. The guidelines include information about drug, nutritional, and respiratory therapies; multidisciplinary care; symptom management; and cognitive/behavioral impairment. […] Shortly after an ALS diagnosis is made, many specialists recommend a breathing test called a forced vital capacity (FVC) and other pulmonary function tests (PFTs). […] The AAN guidelines found that visiting a multidisciplinary ALS clinic (one with many types of health professionals, such as an MDA/ALS Care Center) can help people with ALS get the best possible care. The evidence showed that people with ALS who get care at a multidisciplinary clinic live longer and may have a better quality of life than those who do not.

• #64 Current State and Future Directions in the Diagnosis of Amyotrophic Lateral Sclerosis

  https://www.mdpi.com/2073-4409/12/5/736

  The El Escorial criteria were proposed as the first consensus diagnostic criteria for ALS in 1994 and were primarily designed for clinical trials and scientific research purposes. […] According to the criteria, clinical evidence of UMN and LMN impairment in four anatomically segmented body regions (bulbar, cervical, thoracic, lumbar) is surveyed for the diagnosis. […] The Awaji criteria, published in 2008, elaborated on the electrophysiological findings in the diagnosis of ALS. […] Although achieving improvement in diagnostic accuracy, both the revised El Escorial and the Awaji criteria are associated with various difficult aspects. […] To evaluate the functional status of patients, the ALS functional rating scale (ALSFRS) and its revised form (ALSFRS-R) were established. […] The concept of pre-symptomatic ALS with mild motor impairment (MMI) has been discussed.

• #65 Amyotrophic Lateral Sclerosis: Disease State Overview

  https://www.ajmc.com/view/amyotrophic-lateral-sclerosis-disease-state-overview

  Needle EMG is not specific for ALS and must be coupled with extensive denervation in multiple muscle segments of distal and proximal muscles. […] Furthermore, EMG is used to determine the presence of muscle denervation to differentiate ALS from other conditions. […] The primary initial symptom of ALS is progressive, unilateral weakness in the distal legs and arms without remission or relapse. […] The ALSFRS was developed in 1996 to assess activities of daily living (ADLs) in patients with ALS in an easily administered format. […] Laboratory tests are done in patients with ALS to exclude other conditions. […] Other tests are available, some for research purposes, to aid in the diagnosis of ALS. […] The El Escorial criteria were developed to create a consistent diagnostic process for ALS, guarantee its certainty, and clarify that the varying clinical qualities are complex.

• #66 Advances in molecular pathology, diagnosis, and treatment of amyotrophic lateral sclerosis | The BMJ

  https://www.bmj.com/content/383/bmj-2023-075037

  Although El Escorial and Awaji criteria are useful in clinical research, they are hampered by the heterogeneity of ALS and do not capture the full disease spectrum. […] The ALS-frontotemporal spectrum diagnostic (ALS-FTSD) criteria proposed by Strong and colleagues use three diagnostic axes to define MND, cognitive and behavioral dysfunction, and other non-motor features. […] The recently proposed Gold Coast criteria have attempted to simplify the diagnosis and recognize the potential utility of the development of biomarkers; however, further validation in different populations will be needed before routine use in clinical care or research. […] Variability in rate of symptom progression and survival in ALS represents a major obstacle in clinical trials. […] Disease progression, most often measured by the decline in the revised ALS functional rating scale (ALSFRS-R) over time, differs considerably between patients, and survival ranges from less than one year to more than 10 years.

• #67 Advances in molecular pathology, diagnosis, and treatment of amyotrophic lateral sclerosis | The BMJ

  https://www.bmj.com/content/383/bmj-2023-075037

  Neurofilament, a biomarker for neurodegeneration, is a predictor of the progression and prognosis of ALS. […] A recently proposed survival prediction model for ALS identified eight prognostic predictors and generated five different survival groups applicable to European patients at the individual level. […] This model is an important step toward more effective stratification of patients in clinical studies, but validation in non-European groups is needed, and the model will likely evolve as other predictors are identified. […] The two proposed staging systems are the Kings staging system and the Milano-Torino staging systems. […] The Kings staging system is defined by the number of body regions affected and bulbar and respiratory failure, whereas the Milano-Torino system uses the number of impaired domains as delineated by the ALSFRS-R to define successive stages.

• #68 Advances in molecular pathology, diagnosis, and treatment of amyotrophic lateral sclerosis | The BMJ

  https://www.bmj.com/content/383/bmj-2023-075037

  These systems provide parallel clinical information, using different measures to establish escalating stages, and both have been used to analyze patient population data and are promising endpoints for clinical trials. […] A limitation of both systems is the lack of cognitive and behavioral change captured by staging, although higher disease stage portends more severe cognitive impairment.

• #69 Advances in molecular pathology, diagnosis, and treatment of amyotrophic lateral sclerosis | The BMJ

  https://www.bmj.com/content/383/bmj-2023-075037

  Neurofilament, a biomarker for neurodegeneration, is a predictor of the progression and prognosis of ALS. […] A recently proposed survival prediction model for ALS identified eight prognostic predictors and generated five different survival groups applicable to European patients at the individual level. […] This model is an important step toward more effective stratification of patients in clinical studies, but validation in non-European groups is needed, and the model will likely evolve as other predictors are identified. […] The two proposed staging systems are the Kings staging system and the Milano-Torino staging systems. […] The Kings staging system is defined by the number of body regions affected and bulbar and respiratory failure, whereas the Milano-Torino system uses the number of impaired domains as delineated by the ALSFRS-R to define successive stages.

• #70 Advances in molecular pathology, diagnosis, and treatment of amyotrophic lateral sclerosis | The BMJ

  https://www.bmj.com/content/383/bmj-2023-075037

  These systems provide parallel clinical information, using different measures to establish escalating stages, and both have been used to analyze patient population data and are promising endpoints for clinical trials. […] A limitation of both systems is the lack of cognitive and behavioral change captured by staging, although higher disease stage portends more severe cognitive impairment.

• #71 Current State and Future Directions in the Diagnosis of Amyotrophic Lateral Sclerosis

  https://www.mdpi.com/2073-4409/12/5/736

  Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by loss of upper and lower motor neurons, resulting in progressive weakness of all voluntary muscles and eventual respiratory failure. […] Considering its poor prognosis with a median survival time of 2 to 4 years and limited causal treatment options, an early diagnosis of ALS plays an essential role. […] In recent decades, the diagnosis of ALS was mainly based on clinical findings with support of electrophysiological, imaging and laboratory techniques to exclude other diseases. […] Recent efforts have focused on establishing simplified, more practice-oriented diagnostic guidelines, as well as investigating the potential of specific fluid biomarkers, functional brain imaging and additional measures, such as predictive models, to hasten diagnosis, improve diagnostic accuracy and help outline the disease trajectory for the individual patient.

• #72 Diagnostics | Special Issue : Diagnosis and Treatment of Amyotrophic Lateral Sclerosis: Where We Are and What We Can Expect in the Near Future

  https://www.mdpi.com/journal/diagnostics/special_issues/diagntreat_ALS

  Amyotrophic lateral sclerosis (ALS), the most important disease among the group of motor neuron diseases (MNDs), is characterized by the progressive loss of upper and lower motor neurons, muscle weakness, and pyramidal tract involvement, and is both irreversible and fatal. […] Current diagnostic approaches for ALS patients: state-of-the-art; […] Although new information has recently been published about the molecular pathogenesis, advances in neuroimaging are emerging, new treatment options have been proposed, and new information about cognitive decline as an important symptom is currently involved in the diagnostic procedure, we are far from a detailed understanding of this disease.

• #73 AMP Amyotrophic Lateral Sclerosis | FNIH

  https://fnih.org/our-programs/accelerating-medicines-partnership-amp/amyotrophic-lateral-sclerosis/

  Our mission is to accelerate therapeutic and biomarker development for ALS. […] The AMP ALS program brings together the resources and expertise of the NIH and other stakeholders from academia, life science companies, foundations, patient-focused groups, and research nonprofits to tackle the tremendous challenges of diagnosing, understanding, and treating ALS, a progressive and ultimately fatal neurological disease. […] AMP ALS will build the largest data source for ALS research and expedite the identification of biomarkers and clinical outcome assessments that would allow earlier diagnosis and accelerated drug development. […] The goals are to: 2) Develop validated biomarkers for early diagnosis and treatment assessment. […] Biomarkers are crucial for earlier diagnosis of ALS, potentially before symptoms appear, allowing for possible interventions and improved quality of life.

• #74 Breaking the amyotrophic lateral sclerosis early diagnostic barrier: the promise of general markers

  https://www.explorationpub.com/Journals/ent/Article/100465

  Nevertheless, there are no widely accepted characteristic changes in ALS diagnosis. With the advancement of diagnostic techniques, novel approaches demonstrate the potential for early ALS diagnosis. The purpose of this review is to summarize the current status of features discovery and development for the early diagnosis of ALS, including genes, proteins, neuroimaging, neurophysiology, neuroultrasound, and machine learning models. […] The promising markers for early diagnosis of ALS. […] The main genetic markers evaluated for ALS diagnosis are SOD1, chromosome 9 open reading frame 72 (C9orf72), TARDBP, and fused in sarcoma (FUS) genes. Although neurofilament is the most established disease-specific protein, other proteins, such as chitinases, glial fibrillary acidic protein (GFAP), and inflammation cytokines, can play crucial roles in early diagnosis.

• #75 Early Diagnosis of ALS Benefits Patients

  https://www.contemporaryclinic.com/view/early-diagnosis-of-als-benefits-patients

  Delayed diagnosis prevents individuals with ALS from gaining access to investigational therapies that may improve their disease and simultaneously hinders the research and development process for new, potentially effective treatments. […] Although it may not yet be feasible to diagnose individuals before they experience symptoms, it may be possible to close the gap between the start of symptoms and a formal diagnosis. […] The revised Awaji and El Escorial criteria are the most commonly used diagnostic criteria for ALS, and consensus diagnostic classifications based on these 2 criteria are also available. […] Although use of these scales is commonplace, their diagnostic sensitivity is relatively low, often leading to a diagnosis of probable ALS. […] The study demonstrated that the type of hospital center, departmental vs referral ALS centers, can significantly affect the time to diagnosis.

• #76 Early Diagnosis of ALS Benefits Patients

  https://www.contemporaryclinic.com/view/early-diagnosis-of-als-benefits-patients

  This finding emphasizes the importance of connecting with experienced clinicians, who may better recognize the early signs and symptoms of disease, when an ALS diagnosis is suspected. […] Investigators are working to identify non-genetic risk factors and biomarkers for use in predicting emergence of clinical ALS. […] This study represents a major effort to identify early changes associated with ALS in the months or years preceding the appearance of obvious symptoms. […] One of the goals of detecting ALS earlier is to prevent the emergence of disease symptoms with early interventions. […] Although efforts are still focusing on the search for effective targets for ALS therapies, meaningful improvements in care can be achieved by earlier diagnosis.

• #77

  https://www.orlandohealth.com/services-and-specialties/amyotrophic-lateral-sclerosis-als-lou-gehrigs-disease/diagnosis

  Its important to have ALS diagnosed sooner rather than later to help prevent its progression. […] There is no one test or procedure that is used to diagnose ALS. Rather, it is diagnosed through a clinical examination and series of diagnostic tests, often ruling out other diseases that mimic ALS. […] The diagnosis is made on the basis of history and physical examination. Depending on the clinical findings and test results, the diagnosis of possible, probable and definite ALS would be made. […] Avoiding the delay of ALS diagnosis would reduce patient frustration and uncertainty of the cause of symptoms and would enable earlier use of a disease-modifying therapy. […] As the disease progresses, patients will experience significant weight loss and muscle deterioration, and require respiratory support as the condition affects the breathing muscles, so early diagnosis is crucial.

• #78 Pathogenesis and Presentation of ALS: Examining Reasons for Delayed Diagnosis and Identifying Opportunities for Improvement

  https://www.ajmc.com/view/pathogenesis-and-presentation-of-als-examining-reasons-for-delayed-diagnosis-and-identifying-opportunities-for-improvement

  The initial onset of focal weakness in ALS is subtle, but it spreads relentlessly to affect most muscles. […] The diseases heterogeneity complicates and often delays diagnosis, with devastating burden and quality of life (QOL) impact. […] ALS diagnosis is based primarily on clinical signs and symptoms and exclusion of other causes for LMN and UMN dysfunction. […] The disease course must also be progressive with no reasonable differential diagnosis. […] Standard diagnostic criteria for ALS are lacking, which may amplify diagnostic delays, misdiagnosis, and potentially worsen prognosis. […] Early ALS diagnosis and referral to a multidisciplinary specialized center are vital to improve outcomes, but diagnostic delays are common. […] Identified reasons for this delay included patient awareness, referrals to specialists, misdiagnosis, site of disease onset, age of onset, and neurological comorbidities.

• #79 AMP Amyotrophic Lateral Sclerosis | FNIH

  https://fnih.org/our-programs/accelerating-medicines-partnership-amp/amyotrophic-lateral-sclerosis/

  In addition, validated biomarkers will help monitor disease progression and patients response to treatment, improve clinical trial design, and potentially lead to more effective, personalized drug treatments. […] Through the work of AMP ALS, I am confident we will identify new targets and tools to support diagnosis, prognostication, and assessment of treatment response more efficiently expediting ALS drug development as a whole.

• #80 Breaking the amyotrophic lateral sclerosis early diagnostic barrier: the promise of general markers

  https://www.explorationpub.com/Journals/ent/Article/100465

  Thus, the algorithm or models including multiple diagnostic factors may be a favorable choice due to the high heterogeneity of ALS. To expedite the early diagnosis of ALS, the simpler diagnostic criteria, genetic testing, and NfL measurement could be applied in the future. In addition, the novel techniques should be validated in a larger ALS population. The research efforts will improve the clinical outcomes of ALS patients.

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