Materiały źródłowe

• #1 Zollinger-Ellison Syndrome: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/183555-overview

  Zollinger-Ellison syndrome (ZES) is caused by a nonbeta islet cell, gastrin-secreting tumor of the pancreas that stimulates the acid-secreting cells of the stomach to maximal activity, with consequent gastrointestinal mucosal ulceration. […] The symptoms of Zollinger-Ellison syndrome (ZES) are secondary to hypergastrinemia, which causes hypertrophy of the gastric mucosa, leading to increased numbers of parietal cells and increased maximal acid output. Gastrin by itself also stimulates acid secretion, resulting in increased basal acid secretion. The large quantity of acid produced leads to gastrointestinal mucosal ulceration. It also leads to diarrhea and malabsorption. […] Malabsorption in ZES usually is multifactorial, being caused by direct mucosal damage by acid, inactivation of pancreatic enzymes, and precipitation of bile salts.

• #2 Zollinger-Ellison syndrome: pathogenesis, diagnosis, and management – PubMed

  https://pubmed.ncbi.nlm.nih.gov/9127626/

  Zollinger-Ellison syndrome (ZES) involves hypergastrinemia produced by gastrin-secreting tumor(s) of the pancreas or duodenum. […] Complete surgical tumorectomy for cure is impossible in as many as 70-90% of patients with ZES, who then require long-term medical therapy to reduce acid exposure. […] Proton pump inhibitors (omeprazole, lansoprazole) with careful clinical monitoring provide safe and effective acid control in patients with ZES.

• #3 Zollinger-Ellison Syndrome: A Clinical Overview – Page 2

  https://www.medscape.com/viewarticle/407944_2

  A syndrome characterized by severe peptic ulcer disease, gastric acid hypersecretion, and non-beta islet cell tumors of the pancreas was first described by Zollinger and Ellison in 1955. […] We now know that the potent 'gastric acid secretagogue’ proposed originally by Zollinger and Ellison is the heptadecapeptide gastrin. In this disease, large amounts of gastrin are produced by gastrinoma cells. In patients with Zollinger-Ellison syndrome (ZES), the gastric parietal cell mass is expanded largely because of the trophic effects of hypergastrinemia. This causes increased basal and stimulated acid output, which then produces the symptoms associated with ZES. […] Although up to two thirds of gastrinomas are malignant, it is difficult to determine on histologic appearance alone. Even when malignant, these tumors are slow growing. However, a small number of patients with gastrinomas have tumors that grow and metastasize rapidly.

• #4 ZOLLINGER-ELLISON SYNDROME. CASE REPORT

  http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S2462-85222019000100028

  The pathogenesis of gastrinomas remains unknown. Mutations in tumor suppressor genes (p53, retinoblastoma) and oncogenes are rare, and alterations in the m-TOR pathway and abnormal receptor tyrosine kinase activity in tumor growth have also been reported. […] The exact cell of origin of gastrinomas remains a controversial issue. Ito et al. suggest that pancreatic gastrinomas may originate from islets or duct cells. In the case of duodenal gastrinomas in patients with MEN1, these researchers suggest a higher level of proliferation of duodenal G cells, along with the loss of heterozygosity at the MEN1 locus (11q13) in the G cell. […] The importance of establishing a correct diagnosis of ZES lies in the fact that it requires special treatment. Despite the wide availability of diagnostic tests, there is still a 6-9 year delay in diagnosis. ZES should be suspected in patients with peptic ulcers, ulcers distal to the duodenum, and peptic ulcer disease.

• #5 Zollinger-Ellison Syndrome (Gastrinoma) | Abdominal Key

  https://abdominalkey.com/zollinger-ellison-syndrome-gastrinoma/

  Patients with ZES most often present with symptoms arising from excessive gastric acid secretion. […] The unregulated gastrin production from the gastrinoma binds to CCK-2 receptors located on enterochromaffin-like (ECL) cells causing the release of histamine. Histamine then binds to H2 receptors on parietal cells to stimulate the release of acid. In addition, gastrin also has trophic effects on gastric epithelial and ECL cells. Chronic hypergastrinemia increases parietal cell mass, which further augments acid hypersecretion. […] The enteroendocrine cells that make up the gastrinoma are well differentiated and round, with small nuclei and prominent nucleolus. They often contain neuroendocrine tumor markers, including chromogranin A, neurospecific enolase, and synaptophysin.

• #6 Zollinger-Ellison syndrome pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Zollinger-Ellison_syndrome_pathophysiology

  Zollinger-Ellison syndrome results from increased levels of gastrin due to an existing gastrinoma in the duodenum or pancreas. […] Embryologic endoderm produces enteroendocrine cells and these cells are considered as the origin of gastrinomas. […] Symptoms of Zollinger-Ellison syndrome are related to hypergastrinemia. […] Hypertrophy of gastrin mucosa results in hypergastrinemia. […] Gastric acid secretion increases four to six-fold. […] Hypergastrinemia results from increase activity of parietal cells and histamine-secreting enterochromaffin-like cells. […] Gastric acid secretion overrides the mucosal defense of the gastric and duodenal wall which may cause ulceration and inactivation of pancreatic enzymes. […] The majority of patients have large and multiple peptic ulcers located in distal duodenum and proximal jejunum.

• #7 ZOLLINGER-ELLISON SYNDROME. CASE REPORT

  http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S2462-85222019000100028

  The pathogenesis of gastrinomas remains unknown. Mutations in tumor suppressor genes (p53, retinoblastoma) and oncogenes are rare, and alterations in the m-TOR pathway and abnormal receptor tyrosine kinase activity in tumor growth have also been reported. […] The exact cell of origin of gastrinomas remains a controversial issue. Ito et al. suggest that pancreatic gastrinomas may originate from islets or duct cells. In the case of duodenal gastrinomas in patients with MEN1, these researchers suggest a higher level of proliferation of duodenal G cells, along with the loss of heterozygosity at the MEN1 locus (11q13) in the G cell. […] The importance of establishing a correct diagnosis of ZES lies in the fact that it requires special treatment. Despite the wide availability of diagnostic tests, there is still a 6-9 year delay in diagnosis. ZES should be suspected in patients with peptic ulcers, ulcers distal to the duodenum, and peptic ulcer disease.

• #8 Orphanet: Zollinger-Ellison syndrome

  https://www.orpha.net/en/disease/detail/913

  A rare neuroendocrine neoplasm (NEN) characterized by severe peptic disease (ulcers/esophageal disease) caused by hypergastrinemia secondary to a gastrin-secreting NEN (gastrinoma) resulting in increased gastric acid secretion. […] ZES is caused by a gastrin-secreting tumor (gastrinoma), usually located in the duodenum (50-85%), pancreas, abdominal lymph nodes or, in rare cases, ectopic locations (heart, ovary, liver, mesentery, etc.). […] Gastric acid hypersecretion must be controlled short- and long-term. Oral H(+)-K(+)-ATPase inhibitors (PPIs) are the drugs of choice because of their long duration of action and potency (administered in 1-2 doses/day).

• #9 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  The Zollinger-Ellison Syndrome (ZES) represents a clinical, diagnostic and therapeutic challenge. […] The ZES, as described in 1955, is characterized by peptic ulcers of the upper gastrointestinal tract refractory to medical therapy, diarrhea and severe gastric acid hypersecretion associated with non-beta islet cell tumors of the pancreas. […] It was later demonstrated that this pancreatic tumor, named gastrinoma, ectopically releases gastrin, which is responsible for the gastric hypersecretion. […] More than 80% of gastrinomas are localized in the anatomic area called the triangle of the gastrinomas. […] Most gastrinomas arise from the duodenum (about 75%), whereas they are localized in the pancreas in 25% of cases. […] Gastrinomas may behave in a benign or malignant manner, but usually, even when malignant, they can be slow growing.

• #10 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  The Zollinger-Ellison Syndrome (ZES) represents a clinical, diagnostic and therapeutic challenge. […] The ZES, as described in 1955, is characterized by peptic ulcers of the upper gastrointestinal tract refractory to medical therapy, diarrhea and severe gastric acid hypersecretion associated with non-beta islet cell tumors of the pancreas. […] It was later demonstrated that this pancreatic tumor, named gastrinoma, ectopically releases gastrin, which is responsible for the gastric hypersecretion. […] More than 80% of gastrinomas are localized in the anatomic area called the triangle of the gastrinomas. […] Most gastrinomas arise from the duodenum (about 75%), whereas they are localized in the pancreas in 25% of cases. […] Gastrinomas may behave in a benign or malignant manner, but usually, even when malignant, they can be slow growing.

• #11 ZOLLINGER-ELLISON SYNDROME. CASE REPORT

  http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S2462-85222019000100028

  The pathogenesis of gastrinomas remains unknown. Mutations in tumor suppressor genes (p53, retinoblastoma) and oncogenes are rare, and alterations in the m-TOR pathway and abnormal receptor tyrosine kinase activity in tumor growth have also been reported. […] The exact cell of origin of gastrinomas remains a controversial issue. Ito et al. suggest that pancreatic gastrinomas may originate from islets or duct cells. In the case of duodenal gastrinomas in patients with MEN1, these researchers suggest a higher level of proliferation of duodenal G cells, along with the loss of heterozygosity at the MEN1 locus (11q13) in the G cell. […] The importance of establishing a correct diagnosis of ZES lies in the fact that it requires special treatment. Despite the wide availability of diagnostic tests, there is still a 6-9 year delay in diagnosis. ZES should be suspected in patients with peptic ulcers, ulcers distal to the duodenum, and peptic ulcer disease.

• #12 Management and prognosis of gastrinoma (Zollinger-Ellison syndrome) – UpToDate

  https://www.uptodate.com/contents/management-and-prognosis-of-gastrinoma-zollinger-ellison-syndrome

  Gastrinomas are duodenal or pancreatic neuroendocrine tumors (NETs) that hypersecrete gastrin and lead to Zollinger-Ellison syndrome (ZES). ZES is the clinical syndrome of gastric acid hypersecretion caused by the gastrinoma that results in severe peptic ulcer disease, abdominal pain, and diarrhea. […] Gastrinomas either occur sporadically or are associated with an inherited disorder called multiple endocrine neoplasia type 1 (MEN1), which accounts for approximately 25 percent of cases. […] For patients with gastrinoma and ZES, the goals of therapy are control of the clinical symptoms and complications resulting from the tumor’s autonomous secretion of the hormone gastrin (ie, ZES) and control of the tumor burden itself (ie, the gastrinoma). […] Pharmacologic acid-suppressive therapy is the standard of care for most patients with gastrinoma and ZES as part of the multiple endocrine neoplasia type 1 (MEN1) syndrome. By contrast, many patients with localized sporadic gastrinoma are candidates for surgical therapy in addition to pharmacologic therapy. Successful resection of sporadic gastrinomas both reduces the risk of eventual morbidity and death from metastatic spread of the tumor and either decreases or eliminates the need for pharmacologic acid-suppressive therapy for the associated ZES.

• #13 Study investigates Nexium® benefits patients with Zollinger-Ellison syndrome | EurekAlert!

  https://www.eurekalert.org/news-releases/531358

  Zollinger-Ellison syndrome (ZES), a rare but serious chronic condition, is characterized by the development of a tumor or tumors that secrete excessive levels of gastrin, a hormone that stimulates acid production by the stomach. […] „Zollinger-Ellison syndrome places individuals under constant attack from higher than normal amounts of acid that their stomachs produce. Therefore, people with the condition require treatment that can continuously interfere with this faulty mechanism,” said lead investigator David Metz, MD, Professor of Medicine, and the Director of the Acid-Peptic Program, Division of Gastroenterology, University of Pennsylvania Health System. […] About 25 percent of cases are linked to a genetic syndrome known as multiple endocrine neoplasia type 1 (MEN-1). Nearly half to two-thirds of people with ZES develop cancerous gastrinomas. These tumors generally arise within the pancreas and/or the duodenum, and may spread to the lymph nodes or liver.

• #14 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  Numerous studies support the conclusion that gastrinomas pursue an aggressive growth pattern in 20-30% of cases and an indolent growth pattern in the rest; this seems to be independent of the presence or the absence of positive lymph nodes. […] The gastrin secreting tumor responsible for ZES is the most common tumor in patients affected by Multiple Endocrine Neoplasia type 1 (MEN 1). […] In MEN 1, gastrinomas are mainly localized in the duodenum, they are small and frequently multifocal and may therefore be difficult to detect either by traditional imaging methods or at surgery. […] ZES-MEN 1 is associated with gastric carcinoids, also called ECL-omas (type 2 carcinoids), due to chronic effect of hypergastrinemia on ECL cells. […] The signs and symptoms of ZES are primarily due to gastric acid hypersecretion.

• #15 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  Numerous studies support the conclusion that gastrinomas pursue an aggressive growth pattern in 20-30% of cases and an indolent growth pattern in the rest; this seems to be independent of the presence or the absence of positive lymph nodes. […] The gastrin secreting tumor responsible for ZES is the most common tumor in patients affected by Multiple Endocrine Neoplasia type 1 (MEN 1). […] In MEN 1, gastrinomas are mainly localized in the duodenum, they are small and frequently multifocal and may therefore be difficult to detect either by traditional imaging methods or at surgery. […] ZES-MEN 1 is associated with gastric carcinoids, also called ECL-omas (type 2 carcinoids), due to chronic effect of hypergastrinemia on ECL cells. […] The signs and symptoms of ZES are primarily due to gastric acid hypersecretion.

• #16 Zollinger-Ellison Syndrome: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/183555-overview

  Zollinger-Ellison syndrome (ZES) is caused by a nonbeta islet cell, gastrin-secreting tumor of the pancreas that stimulates the acid-secreting cells of the stomach to maximal activity, with consequent gastrointestinal mucosal ulceration. […] The symptoms of Zollinger-Ellison syndrome (ZES) are secondary to hypergastrinemia, which causes hypertrophy of the gastric mucosa, leading to increased numbers of parietal cells and increased maximal acid output. Gastrin by itself also stimulates acid secretion, resulting in increased basal acid secretion. The large quantity of acid produced leads to gastrointestinal mucosal ulceration. It also leads to diarrhea and malabsorption. […] Malabsorption in ZES usually is multifactorial, being caused by direct mucosal damage by acid, inactivation of pancreatic enzymes, and precipitation of bile salts.

• #17 Zollinger–Ellison syndrome – Wikipedia

  https://en.wikipedia.org/wiki/Zollinger%E2%80%93Ellison_syndrome

  ZollingerEllison syndrome (Z-E syndrome) is a rare disease in which tumors cause the stomach to produce too much acid, resulting in peptic ulcers. […] The syndrome is caused by the formation of a gastrinoma, a neuroendocrine tumor that secretes a hormone called gastrin. High levels of gastrin in the blood (hypergastrinemia) trigger the parietal cells of the stomach to release excess gastric acid. […] Gastrin works on the parietal cells of the gastric glands, causing them to secrete more hydrogen ions into the stomach lumen. In addition, gastrin acts as a trophic factor for parietal cells, causing parietal cell hyperplasia. Normally, hydrogen ion secretion is controlled by a negative feedback loop by gastric cells to maintain a suitable pH, however, the neuroendocrine tumor that is present in individuals with ZollingerEllison Syndrome has no regulation, resulting in excessively large amounts of secretion. Thus, there is an increase in the number of acid-secreting cells, and each of these cells produces acid at a higher rate. The increase in acidity contributes to the development of peptic ulcers in the stomach, duodenum (first portion of the small bowel) and occasionally the jejunum (second portion of the small bowel), the last of which is an 'atypical’ ulcer.

• #18 Zollinger-Ellison Syndrome, gastrinoma

  https://labpedia.net/zollinger-ellison-syndrome-gastrinoma/

  Zollinger-Ellison syndrome is due to gastrin-secreting tumors called Gastrinomas, which may be duodenal or pancreatic endocrine tumors. […] Gastrin-producing islet cell tumors cause gastric-acid hypersecretion with the formation of peptic ulcers and diarrhea. […] Non-beta cells of the pancreatic tumor produce a large amount of gastrin, and patients suffer from ulcers. […] Gastrin leads to increased production of acid, and there is a high level of HCL, which leads to multiple ulcers in the stomach and small bowel. […] Gastrin is a potent hormone secreted from gastric G cells, Proximal duodenal G cells, and pancreatic delta cells. […] Gastrin has three molecular forms: Big gastrin consists of 34 amino acids, G -34. Little gastrin consists of 17 amino acids, G -17. Minigastrin consists of 14 amino acids, G -14.

• #19 Zollinger-Ellison Syndrome, gastrinoma

  https://labpedia.net/zollinger-ellison-syndrome-gastrinoma/

  These are the sources of Gastrin secretion: Endocrine cells (G cells) of the antral mucosa of the stomach. The lesser amount of the G cells of proximal duodenum. A small amount from delta cells in the pancreas. […] Gastrin is a very strong gastric acid secretion stimulant. […] Gastrinomas arise in the pancreas and or the wall of the duodenum. […] More than 50% of tumors are invasive and have already metastasized. […] Zollinger-Ellison syndrome is divided into two types: Type 1 is called G-cell hyperplasia without the presence of Gastrinoma. Type II is due to the gastrinoma of the pancreas or duodenum. […] Raised level of Gastrin (Hypergastrinemia). […] A gastrin level of 1000 ng/L is diagnostic. […] The fasting gastrin level is raised in 95% of the cases. […] Surgical removal of the tumor. […] Medical management: Proton pump inhibitors to reduce acid secretion.

• #20 Zollinger-Ellison Syndrome, gastrinoma

  https://labpedia.net/zollinger-ellison-syndrome-gastrinoma/

  Zollinger-Ellison syndrome is due to gastrin-secreting tumors called Gastrinomas, which may be duodenal or pancreatic endocrine tumors. […] Gastrin-producing islet cell tumors cause gastric-acid hypersecretion with the formation of peptic ulcers and diarrhea. […] Non-beta cells of the pancreatic tumor produce a large amount of gastrin, and patients suffer from ulcers. […] Gastrin leads to increased production of acid, and there is a high level of HCL, which leads to multiple ulcers in the stomach and small bowel. […] Gastrin is a potent hormone secreted from gastric G cells, Proximal duodenal G cells, and pancreatic delta cells. […] Gastrin has three molecular forms: Big gastrin consists of 34 amino acids, G -34. Little gastrin consists of 17 amino acids, G -17. Minigastrin consists of 14 amino acids, G -14.

• #21 Zollinger-Ellison Syndrome, gastrinoma

  https://labpedia.net/zollinger-ellison-syndrome-gastrinoma/

  Zollinger-Ellison syndrome is due to gastrin-secreting tumors called Gastrinomas, which may be duodenal or pancreatic endocrine tumors. […] Gastrin-producing islet cell tumors cause gastric-acid hypersecretion with the formation of peptic ulcers and diarrhea. […] Non-beta cells of the pancreatic tumor produce a large amount of gastrin, and patients suffer from ulcers. […] Gastrin leads to increased production of acid, and there is a high level of HCL, which leads to multiple ulcers in the stomach and small bowel. […] Gastrin is a potent hormone secreted from gastric G cells, Proximal duodenal G cells, and pancreatic delta cells. […] Gastrin has three molecular forms: Big gastrin consists of 34 amino acids, G -34. Little gastrin consists of 17 amino acids, G -17. Minigastrin consists of 14 amino acids, G -14.

• #22 Zollinger-Ellison Syndrome (Gastrinoma) | Abdominal Key

  https://abdominalkey.com/zollinger-ellison-syndrome-gastrinoma/

  Patients with ZES most often present with symptoms arising from excessive gastric acid secretion. […] The unregulated gastrin production from the gastrinoma binds to CCK-2 receptors located on enterochromaffin-like (ECL) cells causing the release of histamine. Histamine then binds to H2 receptors on parietal cells to stimulate the release of acid. In addition, gastrin also has trophic effects on gastric epithelial and ECL cells. Chronic hypergastrinemia increases parietal cell mass, which further augments acid hypersecretion. […] The enteroendocrine cells that make up the gastrinoma are well differentiated and round, with small nuclei and prominent nucleolus. They often contain neuroendocrine tumor markers, including chromogranin A, neurospecific enolase, and synaptophysin.

• #23 Zollinger-Ellison Syndrome (Gastrinoma) | Abdominal Key

  https://abdominalkey.com/zollinger-ellison-syndrome-gastrinoma/

  Patients with ZES most often present with symptoms arising from excessive gastric acid secretion. […] The unregulated gastrin production from the gastrinoma binds to CCK-2 receptors located on enterochromaffin-like (ECL) cells causing the release of histamine. Histamine then binds to H2 receptors on parietal cells to stimulate the release of acid. In addition, gastrin also has trophic effects on gastric epithelial and ECL cells. Chronic hypergastrinemia increases parietal cell mass, which further augments acid hypersecretion. […] The enteroendocrine cells that make up the gastrinoma are well differentiated and round, with small nuclei and prominent nucleolus. They often contain neuroendocrine tumor markers, including chromogranin A, neurospecific enolase, and synaptophysin.

• #24 Zollinger-Ellison Syndrome (Gastrinoma) | Abdominal Key

  https://abdominalkey.com/zollinger-ellison-syndrome-gastrinoma/

  Patients with ZES most often present with symptoms arising from excessive gastric acid secretion. […] The unregulated gastrin production from the gastrinoma binds to CCK-2 receptors located on enterochromaffin-like (ECL) cells causing the release of histamine. Histamine then binds to H2 receptors on parietal cells to stimulate the release of acid. In addition, gastrin also has trophic effects on gastric epithelial and ECL cells. Chronic hypergastrinemia increases parietal cell mass, which further augments acid hypersecretion. […] The enteroendocrine cells that make up the gastrinoma are well differentiated and round, with small nuclei and prominent nucleolus. They often contain neuroendocrine tumor markers, including chromogranin A, neurospecific enolase, and synaptophysin.

• #25 Zollinger–Ellison syndrome – Wikipedia

  https://en.wikipedia.org/wiki/Zollinger%E2%80%93Ellison_syndrome

  ZollingerEllison syndrome (Z-E syndrome) is a rare disease in which tumors cause the stomach to produce too much acid, resulting in peptic ulcers. […] The syndrome is caused by the formation of a gastrinoma, a neuroendocrine tumor that secretes a hormone called gastrin. High levels of gastrin in the blood (hypergastrinemia) trigger the parietal cells of the stomach to release excess gastric acid. […] Gastrin works on the parietal cells of the gastric glands, causing them to secrete more hydrogen ions into the stomach lumen. In addition, gastrin acts as a trophic factor for parietal cells, causing parietal cell hyperplasia. Normally, hydrogen ion secretion is controlled by a negative feedback loop by gastric cells to maintain a suitable pH, however, the neuroendocrine tumor that is present in individuals with ZollingerEllison Syndrome has no regulation, resulting in excessively large amounts of secretion. Thus, there is an increase in the number of acid-secreting cells, and each of these cells produces acid at a higher rate. The increase in acidity contributes to the development of peptic ulcers in the stomach, duodenum (first portion of the small bowel) and occasionally the jejunum (second portion of the small bowel), the last of which is an 'atypical’ ulcer.

• #26 Zollinger-Ellison Syndrome (Gastrinoma) | Abdominal Key

  https://abdominalkey.com/zollinger-ellison-syndrome-gastrinoma/

  Patients with ZES most often present with symptoms arising from excessive gastric acid secretion. […] The unregulated gastrin production from the gastrinoma binds to CCK-2 receptors located on enterochromaffin-like (ECL) cells causing the release of histamine. Histamine then binds to H2 receptors on parietal cells to stimulate the release of acid. In addition, gastrin also has trophic effects on gastric epithelial and ECL cells. Chronic hypergastrinemia increases parietal cell mass, which further augments acid hypersecretion. […] The enteroendocrine cells that make up the gastrinoma are well differentiated and round, with small nuclei and prominent nucleolus. They often contain neuroendocrine tumor markers, including chromogranin A, neurospecific enolase, and synaptophysin.

• #27 Zollinger-Ellison Syndrome (Gastrinoma) | Abdominal Key

  https://abdominalkey.com/zollinger-ellison-syndrome-gastrinoma/

  Patients with ZES most often present with symptoms arising from excessive gastric acid secretion. […] The unregulated gastrin production from the gastrinoma binds to CCK-2 receptors located on enterochromaffin-like (ECL) cells causing the release of histamine. Histamine then binds to H2 receptors on parietal cells to stimulate the release of acid. In addition, gastrin also has trophic effects on gastric epithelial and ECL cells. Chronic hypergastrinemia increases parietal cell mass, which further augments acid hypersecretion. […] The enteroendocrine cells that make up the gastrinoma are well differentiated and round, with small nuclei and prominent nucleolus. They often contain neuroendocrine tumor markers, including chromogranin A, neurospecific enolase, and synaptophysin.

• #28 Zollinger–Ellison syndrome – Wikipedia

  https://en.wikipedia.org/wiki/Zollinger%E2%80%93Ellison_syndrome

  ZollingerEllison syndrome (Z-E syndrome) is a rare disease in which tumors cause the stomach to produce too much acid, resulting in peptic ulcers. […] The syndrome is caused by the formation of a gastrinoma, a neuroendocrine tumor that secretes a hormone called gastrin. High levels of gastrin in the blood (hypergastrinemia) trigger the parietal cells of the stomach to release excess gastric acid. […] Gastrin works on the parietal cells of the gastric glands, causing them to secrete more hydrogen ions into the stomach lumen. In addition, gastrin acts as a trophic factor for parietal cells, causing parietal cell hyperplasia. Normally, hydrogen ion secretion is controlled by a negative feedback loop by gastric cells to maintain a suitable pH, however, the neuroendocrine tumor that is present in individuals with ZollingerEllison Syndrome has no regulation, resulting in excessively large amounts of secretion. Thus, there is an increase in the number of acid-secreting cells, and each of these cells produces acid at a higher rate. The increase in acidity contributes to the development of peptic ulcers in the stomach, duodenum (first portion of the small bowel) and occasionally the jejunum (second portion of the small bowel), the last of which is an 'atypical’ ulcer.

• #29 Zollinger-Ellison Syndrome: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/183555-overview

  Zollinger-Ellison syndrome (ZES) is caused by a nonbeta islet cell, gastrin-secreting tumor of the pancreas that stimulates the acid-secreting cells of the stomach to maximal activity, with consequent gastrointestinal mucosal ulceration. […] The symptoms of Zollinger-Ellison syndrome (ZES) are secondary to hypergastrinemia, which causes hypertrophy of the gastric mucosa, leading to increased numbers of parietal cells and increased maximal acid output. Gastrin by itself also stimulates acid secretion, resulting in increased basal acid secretion. The large quantity of acid produced leads to gastrointestinal mucosal ulceration. It also leads to diarrhea and malabsorption. […] Malabsorption in ZES usually is multifactorial, being caused by direct mucosal damage by acid, inactivation of pancreatic enzymes, and precipitation of bile salts.

• #30 Zollinger-Ellison Syndrome: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/183555-overview

  Zollinger-Ellison syndrome (ZES) is caused by a nonbeta islet cell, gastrin-secreting tumor of the pancreas that stimulates the acid-secreting cells of the stomach to maximal activity, with consequent gastrointestinal mucosal ulceration. […] The symptoms of Zollinger-Ellison syndrome (ZES) are secondary to hypergastrinemia, which causes hypertrophy of the gastric mucosa, leading to increased numbers of parietal cells and increased maximal acid output. Gastrin by itself also stimulates acid secretion, resulting in increased basal acid secretion. The large quantity of acid produced leads to gastrointestinal mucosal ulceration. It also leads to diarrhea and malabsorption. […] Malabsorption in ZES usually is multifactorial, being caused by direct mucosal damage by acid, inactivation of pancreatic enzymes, and precipitation of bile salts.

• #31 Successful Lifetime/Long-Term Medical Treatment of Acid Hypersecretion in Zollinger-Ellison Syndrome (ZES): Myth or Fact? Insights from an Analysis of Results of NIH Long-Term Prospective Studies of ZES

  https://www.mdpi.com/2072-6694/15/5/1377

  Zollinger-Ellison syndrome (ZES) has, since its original description, been characterized by extreme acid hypersecretion due to a neuroendocrine tumor ectopically secreting gastrin, resulting in severe, recalcitrant peptic ulcer disease/gastroesophageal reflux disease (GERD) that is refractory to standard anti-acid treatments. […] From the very beginning, it became apparent that the major cause of the acute- and long-term morbidity and mortality in these patients was not the gastrinomas, which were malignant in a majority of cases and generally slow-growing, but instead the presence of uncontrolled gastric acid hypersecretion. […] Acid secretory studies showed that the untreated basal gastric acid hypersecretory rate averaged 4-fold higher than the upper limit of normal in these patients and could reach almost 10-fold higher than the normal upper limit of basal acid secretion in some patients.

• #32 Zollinger-Ellison Syndrome: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/183555-overview

  Zollinger-Ellison syndrome (ZES) is caused by a nonbeta islet cell, gastrin-secreting tumor of the pancreas that stimulates the acid-secreting cells of the stomach to maximal activity, with consequent gastrointestinal mucosal ulceration. […] The symptoms of Zollinger-Ellison syndrome (ZES) are secondary to hypergastrinemia, which causes hypertrophy of the gastric mucosa, leading to increased numbers of parietal cells and increased maximal acid output. Gastrin by itself also stimulates acid secretion, resulting in increased basal acid secretion. The large quantity of acid produced leads to gastrointestinal mucosal ulceration. It also leads to diarrhea and malabsorption. […] Malabsorption in ZES usually is multifactorial, being caused by direct mucosal damage by acid, inactivation of pancreatic enzymes, and precipitation of bile salts.

• #33 Zollinger-Ellison Syndrome: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/183555-overview

  Zollinger-Ellison syndrome (ZES) is caused by a nonbeta islet cell, gastrin-secreting tumor of the pancreas that stimulates the acid-secreting cells of the stomach to maximal activity, with consequent gastrointestinal mucosal ulceration. […] The symptoms of Zollinger-Ellison syndrome (ZES) are secondary to hypergastrinemia, which causes hypertrophy of the gastric mucosa, leading to increased numbers of parietal cells and increased maximal acid output. Gastrin by itself also stimulates acid secretion, resulting in increased basal acid secretion. The large quantity of acid produced leads to gastrointestinal mucosal ulceration. It also leads to diarrhea and malabsorption. […] Malabsorption in ZES usually is multifactorial, being caused by direct mucosal damage by acid, inactivation of pancreatic enzymes, and precipitation of bile salts.

• #34 Zollinger-Ellison syndrome pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Zollinger-Ellison_syndrome_pathophysiology

  Zollinger-Ellison syndrome results from increased levels of gastrin due to an existing gastrinoma in the duodenum or pancreas. […] Embryologic endoderm produces enteroendocrine cells and these cells are considered as the origin of gastrinomas. […] Symptoms of Zollinger-Ellison syndrome are related to hypergastrinemia. […] Hypertrophy of gastrin mucosa results in hypergastrinemia. […] Gastric acid secretion increases four to six-fold. […] Hypergastrinemia results from increase activity of parietal cells and histamine-secreting enterochromaffin-like cells. […] Gastric acid secretion overrides the mucosal defense of the gastric and duodenal wall which may cause ulceration and inactivation of pancreatic enzymes. […] The majority of patients have large and multiple peptic ulcers located in distal duodenum and proximal jejunum.

• #35 Gastrinoma – Wikipedia

  https://en.wikipedia.org/wiki/Gastrinoma

  Gastrinomas are neuroendocrine tumors (NETs), usually located in the duodenum or pancreas, that secrete gastrin and cause a clinical syndrome known as Zollinger-Ellison syndrome (ZES). […] Gastrinomas overproduce gastrin, resulting in increased gastric acid production, which in turn leads to the Zollinger-Ellison syndrome, characterized by (severe) peptic ulcers, gastroesophageal reflux and diarrhea. […] The excessive gastric acid output breaches the mucosal defenses of the gastric as well as the duodenal wall, causes ulceration, and inactivates pancreatic digestive enzymes with resultant fat malabsorption and diarrhea. […] In gastrinoma, GRP protein causes larger than normal amounts of gastrin secretion, which leads to hyperplasia of the parietal cells. Hyperplasia of parietal cells causes an abnormal release of HCl into the duodenum, which causes the ulcers of the duodenum. Excessive HCl production also causes hyperperistalsis, a condition marked by excessive rapidity of the passage of food through the stomach and intestine and inhibits the activity of lipase, causing severe fatty diarrhea known as steatorrhea. Evenly the long-standing hyper-secretion of gastrin stimulate proliferation of the enterochromaffin like cells (ECL). These cells are found along the side the gastric lumen of the digestive tract. They play a main role in regulation of gastric secretion and motility when stimulated by nervous system. These cells in return will undergo progressive dysplastic changes starting with hyperplasia to neoplasia throughout the gastrointestinal tract.

• #36 ZOLLINGER ELLISON SYNDROME. | PPT

  https://www.slideshare.net/slideshow/zollinger-ellison-syndrome-250738598/250738598

  Drugs called proton pump inhibitors (omeprazole, lansoprazole, and others) are now the first choice for treating this condition. These drugs reduce acid production by the stomach, and help the ulcers in the stomach and small intestine to heal. […] Complications of ulceration include gastrointestinal bleeding and perforation. Acid reflux can cause esophagitis and esophageal stricture. The very high acid levels can inactivate pancreatic enzymes and precipitate bile salts so that malabsorption occurs. Control of acid secretion limits complications. Metastases: approximately 30-40% of gastrinoma are associated with liver metastases. At diagnosis, 5-10% of duodenal gastrinoma and 20-25% of pancreatic gastrinoma are associated with liver metastases.

• #37 Zollinger-Ellison Syndrome: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/183555-overview

  Zollinger-Ellison syndrome (ZES) is caused by a nonbeta islet cell, gastrin-secreting tumor of the pancreas that stimulates the acid-secreting cells of the stomach to maximal activity, with consequent gastrointestinal mucosal ulceration. […] The symptoms of Zollinger-Ellison syndrome (ZES) are secondary to hypergastrinemia, which causes hypertrophy of the gastric mucosa, leading to increased numbers of parietal cells and increased maximal acid output. Gastrin by itself also stimulates acid secretion, resulting in increased basal acid secretion. The large quantity of acid produced leads to gastrointestinal mucosal ulceration. It also leads to diarrhea and malabsorption. […] Malabsorption in ZES usually is multifactorial, being caused by direct mucosal damage by acid, inactivation of pancreatic enzymes, and precipitation of bile salts.

• #38 Zollinger-Ellison syndrome pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Zollinger-Ellison_syndrome_pathophysiology

  Inactivation of pancreatic enzymes leads to fat malabsorption and diarrhea. […] High gastric acid secretion does not reabsorb in small intestine and colon; therefore, it results in chronic diarrhea. […] Sodium and water do not reabsorb in presence of high volume of gastric acids which results in secretory diarrhea. […] The major factors related to fat malabsorption are as following: Gastric mucosal damage, Inactivation of Pancreatic enzymes, Bile salts precipitation.

• #39 Zollinger-Ellison Syndrome: Background, Pathophysiology, Etiology

  https://emedicine.medscape.com/article/183555-overview

  Zollinger-Ellison syndrome (ZES) is caused by a nonbeta islet cell, gastrin-secreting tumor of the pancreas that stimulates the acid-secreting cells of the stomach to maximal activity, with consequent gastrointestinal mucosal ulceration. […] The symptoms of Zollinger-Ellison syndrome (ZES) are secondary to hypergastrinemia, which causes hypertrophy of the gastric mucosa, leading to increased numbers of parietal cells and increased maximal acid output. Gastrin by itself also stimulates acid secretion, resulting in increased basal acid secretion. The large quantity of acid produced leads to gastrointestinal mucosal ulceration. It also leads to diarrhea and malabsorption. […] Malabsorption in ZES usually is multifactorial, being caused by direct mucosal damage by acid, inactivation of pancreatic enzymes, and precipitation of bile salts.

• #40 Zollinger-Ellison syndrome pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Zollinger-Ellison_syndrome_pathophysiology

  Inactivation of pancreatic enzymes leads to fat malabsorption and diarrhea. […] High gastric acid secretion does not reabsorb in small intestine and colon; therefore, it results in chronic diarrhea. […] Sodium and water do not reabsorb in presence of high volume of gastric acids which results in secretory diarrhea. […] The major factors related to fat malabsorption are as following: Gastric mucosal damage, Inactivation of Pancreatic enzymes, Bile salts precipitation.

• #41 Zollinger-Ellison syndrome pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Zollinger-Ellison_syndrome_pathophysiology

  Inactivation of pancreatic enzymes leads to fat malabsorption and diarrhea. […] High gastric acid secretion does not reabsorb in small intestine and colon; therefore, it results in chronic diarrhea. […] Sodium and water do not reabsorb in presence of high volume of gastric acids which results in secretory diarrhea. […] The major factors related to fat malabsorption are as following: Gastric mucosal damage, Inactivation of Pancreatic enzymes, Bile salts precipitation.

• #42 Zollinger-Ellison syndrome pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Zollinger-Ellison_syndrome_pathophysiology

  Inactivation of pancreatic enzymes leads to fat malabsorption and diarrhea. […] High gastric acid secretion does not reabsorb in small intestine and colon; therefore, it results in chronic diarrhea. […] Sodium and water do not reabsorb in presence of high volume of gastric acids which results in secretory diarrhea. […] The major factors related to fat malabsorption are as following: Gastric mucosal damage, Inactivation of Pancreatic enzymes, Bile salts precipitation.

• #43

  https://step1.medbullets.com/gastrointestinal/111051/zollinger-ellison-ze-syndrome

  syndrome characterized by the secretion of gastrin by duodenal or pancreatic neuroendocrine tumors (gastrinomas) […] excessive gastrin secretion from gastrinoma leads to high gastric acid output […] gastrin has trophic action on gastric parietal cells and histamine-secreting enterochromaffin-like cells […] high gastric acid secreting overwhelms the neutralizing capacity of pancreatic bicarbonate secretion, resulting in low pH of intestinal contents […] the low pH inactivates pancreatic digestive enzymes and thus interferes with the emulsification of fat by bile acids […] results in maldigestion and malabsorption […] high serum gastrin concentrations inhibit the absorption of sodium and water by the small intestine.

• #44

  https://step1.medbullets.com/gastrointestinal/111051/zollinger-ellison-ze-syndrome

  syndrome characterized by the secretion of gastrin by duodenal or pancreatic neuroendocrine tumors (gastrinomas) […] excessive gastrin secretion from gastrinoma leads to high gastric acid output […] gastrin has trophic action on gastric parietal cells and histamine-secreting enterochromaffin-like cells […] high gastric acid secreting overwhelms the neutralizing capacity of pancreatic bicarbonate secretion, resulting in low pH of intestinal contents […] the low pH inactivates pancreatic digestive enzymes and thus interferes with the emulsification of fat by bile acids […] results in maldigestion and malabsorption […] high serum gastrin concentrations inhibit the absorption of sodium and water by the small intestine.

• #45

  https://step1.medbullets.com/gastrointestinal/111051/zollinger-ellison-ze-syndrome

  syndrome characterized by the secretion of gastrin by duodenal or pancreatic neuroendocrine tumors (gastrinomas) […] excessive gastrin secretion from gastrinoma leads to high gastric acid output […] gastrin has trophic action on gastric parietal cells and histamine-secreting enterochromaffin-like cells […] high gastric acid secreting overwhelms the neutralizing capacity of pancreatic bicarbonate secretion, resulting in low pH of intestinal contents […] the low pH inactivates pancreatic digestive enzymes and thus interferes with the emulsification of fat by bile acids […] results in maldigestion and malabsorption […] high serum gastrin concentrations inhibit the absorption of sodium and water by the small intestine.

• #46 Zollinger-Ellison syndrome pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Zollinger-Ellison_syndrome_pathophysiology

  Inactivation of pancreatic enzymes leads to fat malabsorption and diarrhea. […] High gastric acid secretion does not reabsorb in small intestine and colon; therefore, it results in chronic diarrhea. […] Sodium and water do not reabsorb in presence of high volume of gastric acids which results in secretory diarrhea. […] The major factors related to fat malabsorption are as following: Gastric mucosal damage, Inactivation of Pancreatic enzymes, Bile salts precipitation.

• #47 Zollinger-Ellison syndrome pathophysiology – wikidoc

  https://www.wikidoc.org/index.php/Zollinger-Ellison_syndrome_pathophysiology

  Inactivation of pancreatic enzymes leads to fat malabsorption and diarrhea. […] High gastric acid secretion does not reabsorb in small intestine and colon; therefore, it results in chronic diarrhea. […] Sodium and water do not reabsorb in presence of high volume of gastric acids which results in secretory diarrhea. […] The major factors related to fat malabsorption are as following: Gastric mucosal damage, Inactivation of Pancreatic enzymes, Bile salts precipitation.

• #48 Gastrinoma – Wikipedia

  https://en.wikipedia.org/wiki/Gastrinoma

  Gastrinomas are neuroendocrine tumors (NETs), usually located in the duodenum or pancreas, that secrete gastrin and cause a clinical syndrome known as Zollinger-Ellison syndrome (ZES). […] Gastrinomas overproduce gastrin, resulting in increased gastric acid production, which in turn leads to the Zollinger-Ellison syndrome, characterized by (severe) peptic ulcers, gastroesophageal reflux and diarrhea. […] The excessive gastric acid output breaches the mucosal defenses of the gastric as well as the duodenal wall, causes ulceration, and inactivates pancreatic digestive enzymes with resultant fat malabsorption and diarrhea. […] In gastrinoma, GRP protein causes larger than normal amounts of gastrin secretion, which leads to hyperplasia of the parietal cells. Hyperplasia of parietal cells causes an abnormal release of HCl into the duodenum, which causes the ulcers of the duodenum. Excessive HCl production also causes hyperperistalsis, a condition marked by excessive rapidity of the passage of food through the stomach and intestine and inhibits the activity of lipase, causing severe fatty diarrhea known as steatorrhea. Evenly the long-standing hyper-secretion of gastrin stimulate proliferation of the enterochromaffin like cells (ECL). These cells are found along the side the gastric lumen of the digestive tract. They play a main role in regulation of gastric secretion and motility when stimulated by nervous system. These cells in return will undergo progressive dysplastic changes starting with hyperplasia to neoplasia throughout the gastrointestinal tract.

• #49 Gastrinoma – Wikipedia

  https://en.wikipedia.org/wiki/Gastrinoma

  Gastrinomas are neuroendocrine tumors (NETs), usually located in the duodenum or pancreas, that secrete gastrin and cause a clinical syndrome known as Zollinger-Ellison syndrome (ZES). […] Gastrinomas overproduce gastrin, resulting in increased gastric acid production, which in turn leads to the Zollinger-Ellison syndrome, characterized by (severe) peptic ulcers, gastroesophageal reflux and diarrhea. […] The excessive gastric acid output breaches the mucosal defenses of the gastric as well as the duodenal wall, causes ulceration, and inactivates pancreatic digestive enzymes with resultant fat malabsorption and diarrhea. […] In gastrinoma, GRP protein causes larger than normal amounts of gastrin secretion, which leads to hyperplasia of the parietal cells. Hyperplasia of parietal cells causes an abnormal release of HCl into the duodenum, which causes the ulcers of the duodenum. Excessive HCl production also causes hyperperistalsis, a condition marked by excessive rapidity of the passage of food through the stomach and intestine and inhibits the activity of lipase, causing severe fatty diarrhea known as steatorrhea. Evenly the long-standing hyper-secretion of gastrin stimulate proliferation of the enterochromaffin like cells (ECL). These cells are found along the side the gastric lumen of the digestive tract. They play a main role in regulation of gastric secretion and motility when stimulated by nervous system. These cells in return will undergo progressive dysplastic changes starting with hyperplasia to neoplasia throughout the gastrointestinal tract.

• #50 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  Numerous studies support the conclusion that gastrinomas pursue an aggressive growth pattern in 20-30% of cases and an indolent growth pattern in the rest; this seems to be independent of the presence or the absence of positive lymph nodes. […] The gastrin secreting tumor responsible for ZES is the most common tumor in patients affected by Multiple Endocrine Neoplasia type 1 (MEN 1). […] In MEN 1, gastrinomas are mainly localized in the duodenum, they are small and frequently multifocal and may therefore be difficult to detect either by traditional imaging methods or at surgery. […] ZES-MEN 1 is associated with gastric carcinoids, also called ECL-omas (type 2 carcinoids), due to chronic effect of hypergastrinemia on ECL cells. […] The signs and symptoms of ZES are primarily due to gastric acid hypersecretion.

• #51 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  The Zollinger-Ellison Syndrome (ZES) represents a clinical, diagnostic and therapeutic challenge. […] The ZES, as described in 1955, is characterized by peptic ulcers of the upper gastrointestinal tract refractory to medical therapy, diarrhea and severe gastric acid hypersecretion associated with non-beta islet cell tumors of the pancreas. […] It was later demonstrated that this pancreatic tumor, named gastrinoma, ectopically releases gastrin, which is responsible for the gastric hypersecretion. […] More than 80% of gastrinomas are localized in the anatomic area called the triangle of the gastrinomas. […] Most gastrinomas arise from the duodenum (about 75%), whereas they are localized in the pancreas in 25% of cases. […] Gastrinomas may behave in a benign or malignant manner, but usually, even when malignant, they can be slow growing.

• #52 Gastrinoma – Knowledge @ AMBOSS

  https://www.amboss.com/us/knowledge/gastrinoma/

  Gastrinomas are neuroendocrine tumors of the GI tract that secrete gastrin. […] Hypergastrinemia stimulation of parietal cells gastric acid hypersecretion, which leads to: Peptic ulcer disease, Inactivation of pancreatic enzymes diarrhea, steatorrhea malabsorption. […] 60% of gastrinomas are malignant (but slow-growing). […] Secretin stimulation test: In individuals with gastrinoma, secretin infusion causes a dramatic increase in gastrin secretion.

• #53 Zollinger-Ellison Syndrome: A Clinical Overview – Page 2

  https://www.medscape.com/viewarticle/407944_2

  A syndrome characterized by severe peptic ulcer disease, gastric acid hypersecretion, and non-beta islet cell tumors of the pancreas was first described by Zollinger and Ellison in 1955. […] We now know that the potent 'gastric acid secretagogue’ proposed originally by Zollinger and Ellison is the heptadecapeptide gastrin. In this disease, large amounts of gastrin are produced by gastrinoma cells. In patients with Zollinger-Ellison syndrome (ZES), the gastric parietal cell mass is expanded largely because of the trophic effects of hypergastrinemia. This causes increased basal and stimulated acid output, which then produces the symptoms associated with ZES. […] Although up to two thirds of gastrinomas are malignant, it is difficult to determine on histologic appearance alone. Even when malignant, these tumors are slow growing. However, a small number of patients with gastrinomas have tumors that grow and metastasize rapidly.

• #54 Zollinger-Ellison Syndrome: A Clinical Overview – Page 2

  https://www.medscape.com/viewarticle/407944_2

  A syndrome characterized by severe peptic ulcer disease, gastric acid hypersecretion, and non-beta islet cell tumors of the pancreas was first described by Zollinger and Ellison in 1955. […] We now know that the potent 'gastric acid secretagogue’ proposed originally by Zollinger and Ellison is the heptadecapeptide gastrin. In this disease, large amounts of gastrin are produced by gastrinoma cells. In patients with Zollinger-Ellison syndrome (ZES), the gastric parietal cell mass is expanded largely because of the trophic effects of hypergastrinemia. This causes increased basal and stimulated acid output, which then produces the symptoms associated with ZES. […] Although up to two thirds of gastrinomas are malignant, it is difficult to determine on histologic appearance alone. Even when malignant, these tumors are slow growing. However, a small number of patients with gastrinomas have tumors that grow and metastasize rapidly.

• #55 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  Numerous studies support the conclusion that gastrinomas pursue an aggressive growth pattern in 20-30% of cases and an indolent growth pattern in the rest; this seems to be independent of the presence or the absence of positive lymph nodes. […] The gastrin secreting tumor responsible for ZES is the most common tumor in patients affected by Multiple Endocrine Neoplasia type 1 (MEN 1). […] In MEN 1, gastrinomas are mainly localized in the duodenum, they are small and frequently multifocal and may therefore be difficult to detect either by traditional imaging methods or at surgery. […] ZES-MEN 1 is associated with gastric carcinoids, also called ECL-omas (type 2 carcinoids), due to chronic effect of hypergastrinemia on ECL cells. […] The signs and symptoms of ZES are primarily due to gastric acid hypersecretion.

• #56 ZOLLINGER ELLISON SYNDROME. | PPT

  https://www.slideshare.net/slideshow/zollinger-ellison-syndrome-250738598/250738598

  Drugs called proton pump inhibitors (omeprazole, lansoprazole, and others) are now the first choice for treating this condition. These drugs reduce acid production by the stomach, and help the ulcers in the stomach and small intestine to heal. […] Complications of ulceration include gastrointestinal bleeding and perforation. Acid reflux can cause esophagitis and esophageal stricture. The very high acid levels can inactivate pancreatic enzymes and precipitate bile salts so that malabsorption occurs. Control of acid secretion limits complications. Metastases: approximately 30-40% of gastrinoma are associated with liver metastases. At diagnosis, 5-10% of duodenal gastrinoma and 20-25% of pancreatic gastrinoma are associated with liver metastases.

• #57 ZOLLINGER ELLISON SYNDROME. | PPT

  https://www.slideshare.net/slideshow/zollinger-ellison-syndrome-250738598/250738598

  Drugs called proton pump inhibitors (omeprazole, lansoprazole, and others) are now the first choice for treating this condition. These drugs reduce acid production by the stomach, and help the ulcers in the stomach and small intestine to heal. […] Complications of ulceration include gastrointestinal bleeding and perforation. Acid reflux can cause esophagitis and esophageal stricture. The very high acid levels can inactivate pancreatic enzymes and precipitate bile salts so that malabsorption occurs. Control of acid secretion limits complications. Metastases: approximately 30-40% of gastrinoma are associated with liver metastases. At diagnosis, 5-10% of duodenal gastrinoma and 20-25% of pancreatic gastrinoma are associated with liver metastases.

• #58 Management and prognosis of gastrinoma (Zollinger-Ellison syndrome) – UpToDate

  https://www.uptodate.com/contents/management-and-prognosis-of-gastrinoma-zollinger-ellison-syndrome

  Gastrinomas are duodenal or pancreatic neuroendocrine tumors (NETs) that hypersecrete gastrin and lead to Zollinger-Ellison syndrome (ZES). ZES is the clinical syndrome of gastric acid hypersecretion caused by the gastrinoma that results in severe peptic ulcer disease, abdominal pain, and diarrhea. […] Gastrinomas either occur sporadically or are associated with an inherited disorder called multiple endocrine neoplasia type 1 (MEN1), which accounts for approximately 25 percent of cases. […] For patients with gastrinoma and ZES, the goals of therapy are control of the clinical symptoms and complications resulting from the tumor’s autonomous secretion of the hormone gastrin (ie, ZES) and control of the tumor burden itself (ie, the gastrinoma). […] Pharmacologic acid-suppressive therapy is the standard of care for most patients with gastrinoma and ZES as part of the multiple endocrine neoplasia type 1 (MEN1) syndrome. By contrast, many patients with localized sporadic gastrinoma are candidates for surgical therapy in addition to pharmacologic therapy. Successful resection of sporadic gastrinomas both reduces the risk of eventual morbidity and death from metastatic spread of the tumor and either decreases or eliminates the need for pharmacologic acid-suppressive therapy for the associated ZES.

• #59 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  Numerous studies support the conclusion that gastrinomas pursue an aggressive growth pattern in 20-30% of cases and an indolent growth pattern in the rest; this seems to be independent of the presence or the absence of positive lymph nodes. […] The gastrin secreting tumor responsible for ZES is the most common tumor in patients affected by Multiple Endocrine Neoplasia type 1 (MEN 1). […] In MEN 1, gastrinomas are mainly localized in the duodenum, they are small and frequently multifocal and may therefore be difficult to detect either by traditional imaging methods or at surgery. […] ZES-MEN 1 is associated with gastric carcinoids, also called ECL-omas (type 2 carcinoids), due to chronic effect of hypergastrinemia on ECL cells. […] The signs and symptoms of ZES are primarily due to gastric acid hypersecretion.

• #60 Gastric Neuroendocrine Tumors – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK537344/

  Type 2 GNETs are associated with Zollinger-Ellison syndrome and multiple endocrine neoplasia type 1 (MEN1), exhibiting variable malignancy potential. […] Type 2 GNETs develop in association with ZES, often in the context of MEN1. In these cases, excessive gastrin production from gastrinoma results in ECL cell proliferation and tumor formation, although the presence of MEN1 mutations also contributes to their pathogenesis. […] Type 2 GNETs have a higher malignant potential than type 1 but still exhibit a relatively indolent course in most cases.

• #61 Gastric Neuroendocrine Tumors – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK537344/

  Type 2 GNETs are associated with Zollinger-Ellison syndrome and multiple endocrine neoplasia type 1 (MEN1), exhibiting variable malignancy potential. […] Type 2 GNETs develop in association with ZES, often in the context of MEN1. In these cases, excessive gastrin production from gastrinoma results in ECL cell proliferation and tumor formation, although the presence of MEN1 mutations also contributes to their pathogenesis. […] Type 2 GNETs have a higher malignant potential than type 1 but still exhibit a relatively indolent course in most cases.

• #62 Management and prognosis of gastrinoma (Zollinger-Ellison syndrome) – UpToDate

  https://www.uptodate.com/contents/management-and-prognosis-of-gastrinoma-zollinger-ellison-syndrome

  Gastrinomas are duodenal or pancreatic neuroendocrine tumors (NETs) that hypersecrete gastrin and lead to Zollinger-Ellison syndrome (ZES). ZES is the clinical syndrome of gastric acid hypersecretion caused by the gastrinoma that results in severe peptic ulcer disease, abdominal pain, and diarrhea. […] Gastrinomas either occur sporadically or are associated with an inherited disorder called multiple endocrine neoplasia type 1 (MEN1), which accounts for approximately 25 percent of cases. […] For patients with gastrinoma and ZES, the goals of therapy are control of the clinical symptoms and complications resulting from the tumor’s autonomous secretion of the hormone gastrin (ie, ZES) and control of the tumor burden itself (ie, the gastrinoma). […] Pharmacologic acid-suppressive therapy is the standard of care for most patients with gastrinoma and ZES as part of the multiple endocrine neoplasia type 1 (MEN1) syndrome. By contrast, many patients with localized sporadic gastrinoma are candidates for surgical therapy in addition to pharmacologic therapy. Successful resection of sporadic gastrinomas both reduces the risk of eventual morbidity and death from metastatic spread of the tumor and either decreases or eliminates the need for pharmacologic acid-suppressive therapy for the associated ZES.

• #63 Management and prognosis of gastrinoma (Zollinger-Ellison syndrome) – UpToDate

  https://www.uptodate.com/contents/management-and-prognosis-of-gastrinoma-zollinger-ellison-syndrome

  Gastrinomas are duodenal or pancreatic neuroendocrine tumors (NETs) that hypersecrete gastrin and lead to Zollinger-Ellison syndrome (ZES). ZES is the clinical syndrome of gastric acid hypersecretion caused by the gastrinoma that results in severe peptic ulcer disease, abdominal pain, and diarrhea. […] Gastrinomas either occur sporadically or are associated with an inherited disorder called multiple endocrine neoplasia type 1 (MEN1), which accounts for approximately 25 percent of cases. […] For patients with gastrinoma and ZES, the goals of therapy are control of the clinical symptoms and complications resulting from the tumor’s autonomous secretion of the hormone gastrin (ie, ZES) and control of the tumor burden itself (ie, the gastrinoma). […] Pharmacologic acid-suppressive therapy is the standard of care for most patients with gastrinoma and ZES as part of the multiple endocrine neoplasia type 1 (MEN1) syndrome. By contrast, many patients with localized sporadic gastrinoma are candidates for surgical therapy in addition to pharmacologic therapy. Successful resection of sporadic gastrinomas both reduces the risk of eventual morbidity and death from metastatic spread of the tumor and either decreases or eliminates the need for pharmacologic acid-suppressive therapy for the associated ZES.

• #64 Orphanet: Zollinger-Ellison syndrome

  https://www.orpha.net/en/disease/detail/913

  A rare neuroendocrine neoplasm (NEN) characterized by severe peptic disease (ulcers/esophageal disease) caused by hypergastrinemia secondary to a gastrin-secreting NEN (gastrinoma) resulting in increased gastric acid secretion. […] ZES is caused by a gastrin-secreting tumor (gastrinoma), usually located in the duodenum (50-85%), pancreas, abdominal lymph nodes or, in rare cases, ectopic locations (heart, ovary, liver, mesentery, etc.). […] Gastric acid hypersecretion must be controlled short- and long-term. Oral H(+)-K(+)-ATPase inhibitors (PPIs) are the drugs of choice because of their long duration of action and potency (administered in 1-2 doses/day).

• #65 Zollinger-Ellison Syndrome Causes, Treatments, Symptoms, Prognosis, and More

  https://www.webmd.com/digestive-disorders/zollinger-ellison-syndrome

  Zollinger-Ellison syndrome (ZES) is a disease of the gastrointestinal system. People who have ZES develop tumors known as gastrinomas in the pancreas and duodenum (the first section of the small intestine). The gastrinomas caused by ZES secrete the hormone gastrin. Because gastrin creates excessive stomach acid, 90 percent of patients with ZES develop stomach and duodenal ulcers. […] ZES is treated by reducing the amount of acid your stomach produces. Medications called proton pump inhibitors are usually prescribed. These drugs, which include dexlansoprazole (Dexilant), esomeprazole (Nexium), lansoprazole (Prevacid), omeprazole (Prilosec, Zegerid), pantoprazole (Protonix), and rabeprazole (Aciphex), curb the production of stomach acid and allow the ulcers to heal. […] Treatment of ZES depends on whether the gastrinoma is sporadic or part of the inherited MEN I syndrome. While the latter is usually treated with acid suppression alone, sporadic gastrinomas are treated with acid suppression and surgical removal of the tumor. Somatostatin analogs such as octreotide, which suppresses hormone production, are also very good at controlling symptoms.

• #66 Successful Lifetime/Long-Term Medical Treatment of Acid Hypersecretion in Zollinger-Ellison Syndrome (ZES): Myth or Fact? Insights from an Analysis of Results of NIH Long-Term Prospective Studies of ZES

  https://www.mdpi.com/2072-6694/15/5/1377

  The current study aimed to address these issues. The NIH prospective study on all aspects of ZES has been in effect since 1974, and part of the study involves the long-term medical management of the acid hypersecretion of all patients. […] The most important conclusion of the present study is that long-term/lifelong medical treatment of acid hypersecretion in ZES patients is possible and can be successful in controlling peptic acid symptoms and preventing the development of acid-related complications in all patients.

• #67 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  Currently, after the introduction of potent antisecretory drugs, such as H2 antagonists and proton pump inhibitors, the most important aspect for these patients is the growth of the neoplasm. […] The role of surgery in the treatment of ZES has evolved considerably from 1955 to now. […] Gastrinomas commonly metastasize in the lymph nodes and sometimes arise in this site; hence, the resection of all the lymph nodes in the peripancreatic region is important, even if they do not appear swollen. […] It has also been reported that more than 50% of patients are free from disease after surgery and the majority of them remain so for the following 5-10 years. […] In conclusion, chemotherapy is not the treatment of first choice in patients with gastrin secreting tumors, but seems to be indicated in rapidly evolving tumors in which the mass of the primary tumor increases more than 25% in a period of follow-up of 12 mo or in which the tumoral symptoms cannot be treated by other means.

• #68 Zollinger-Ellison syndrome: pathogenesis, diagnosis, and management – PubMed

  https://pubmed.ncbi.nlm.nih.gov/9127626/

  Zollinger-Ellison syndrome (ZES) involves hypergastrinemia produced by gastrin-secreting tumor(s) of the pancreas or duodenum. […] Complete surgical tumorectomy for cure is impossible in as many as 70-90% of patients with ZES, who then require long-term medical therapy to reduce acid exposure. […] Proton pump inhibitors (omeprazole, lansoprazole) with careful clinical monitoring provide safe and effective acid control in patients with ZES.

• #69 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  Currently, after the introduction of potent antisecretory drugs, such as H2 antagonists and proton pump inhibitors, the most important aspect for these patients is the growth of the neoplasm. […] The role of surgery in the treatment of ZES has evolved considerably from 1955 to now. […] Gastrinomas commonly metastasize in the lymph nodes and sometimes arise in this site; hence, the resection of all the lymph nodes in the peripancreatic region is important, even if they do not appear swollen. […] It has also been reported that more than 50% of patients are free from disease after surgery and the majority of them remain so for the following 5-10 years. […] In conclusion, chemotherapy is not the treatment of first choice in patients with gastrin secreting tumors, but seems to be indicated in rapidly evolving tumors in which the mass of the primary tumor increases more than 25% in a period of follow-up of 12 mo or in which the tumoral symptoms cannot be treated by other means.

• #70 Zollinger-Ellison Syndrome Causes, Treatments, Symptoms, Prognosis, and More

  https://www.webmd.com/digestive-disorders/zollinger-ellison-syndrome

  Zollinger-Ellison syndrome (ZES) is a disease of the gastrointestinal system. People who have ZES develop tumors known as gastrinomas in the pancreas and duodenum (the first section of the small intestine). The gastrinomas caused by ZES secrete the hormone gastrin. Because gastrin creates excessive stomach acid, 90 percent of patients with ZES develop stomach and duodenal ulcers. […] ZES is treated by reducing the amount of acid your stomach produces. Medications called proton pump inhibitors are usually prescribed. These drugs, which include dexlansoprazole (Dexilant), esomeprazole (Nexium), lansoprazole (Prevacid), omeprazole (Prilosec, Zegerid), pantoprazole (Protonix), and rabeprazole (Aciphex), curb the production of stomach acid and allow the ulcers to heal. […] Treatment of ZES depends on whether the gastrinoma is sporadic or part of the inherited MEN I syndrome. While the latter is usually treated with acid suppression alone, sporadic gastrinomas are treated with acid suppression and surgical removal of the tumor. Somatostatin analogs such as octreotide, which suppresses hormone production, are also very good at controlling symptoms.

• #71 Zollinger-Ellison Syndrome – Endocrine Surgery | UCLA Health

  https://www.uclahealth.org/medical-services/surgery/endocrine-surgery/patient-resources/patient-education/endocrine-surgery-encyclopedia/zollinger-ellison-syndrome

  Early diagnosis and surgical removal of the tumor is associated with a cure rate of only 20% to 25%. However, gastrinomas grow slowly, and patients may live for many years after the tumor is discovered. Acid-suppressing medications are very effective at controlling the symptoms of acid overproduction.

• #72 Zollinger-Ellison Syndrome Causes, Treatments, Symptoms, Prognosis, and More

  https://www.webmd.com/digestive-disorders/zollinger-ellison-syndrome

  Zollinger-Ellison syndrome (ZES) is a disease of the gastrointestinal system. People who have ZES develop tumors known as gastrinomas in the pancreas and duodenum (the first section of the small intestine). The gastrinomas caused by ZES secrete the hormone gastrin. Because gastrin creates excessive stomach acid, 90 percent of patients with ZES develop stomach and duodenal ulcers. […] ZES is treated by reducing the amount of acid your stomach produces. Medications called proton pump inhibitors are usually prescribed. These drugs, which include dexlansoprazole (Dexilant), esomeprazole (Nexium), lansoprazole (Prevacid), omeprazole (Prilosec, Zegerid), pantoprazole (Protonix), and rabeprazole (Aciphex), curb the production of stomach acid and allow the ulcers to heal. […] Treatment of ZES depends on whether the gastrinoma is sporadic or part of the inherited MEN I syndrome. While the latter is usually treated with acid suppression alone, sporadic gastrinomas are treated with acid suppression and surgical removal of the tumor. Somatostatin analogs such as octreotide, which suppresses hormone production, are also very good at controlling symptoms.

• #73

  http://generalsurgery.com.ua/article/view/314714

  ZollingerEllison syndrome (ZES) is a rare pathology that does not have specific clinical manifestations and is not always diagnosed in time. […] The characteristic changes in gastric acid production associated with this pathology and their diagnostic value (sensitivity and specificity) are presented. At the same time, indicators of both basal and maximal stimulated gastric acid production are significantly increased. […] An absolute criterion in favor of ZES is fasting gastrin values of 1000 pg/ml or more. […] The information on the possible localization of gastrin, the incidence of malignant transformation, and the mechanism of metastasis is given. […] Based on the findings, a differentiated treatment strategy for patients with ZES is provided. […] The prospects of a new treatment direction the use of targeted radiotherapy are shown.

• #74 Treatment of Zollinger-Ellison Syndrome

  https://www.wjgnet.com/1007-9327/full/v11/i35/5423.htm

  Currently, after the introduction of potent antisecretory drugs, such as H2 antagonists and proton pump inhibitors, the most important aspect for these patients is the growth of the neoplasm. […] The role of surgery in the treatment of ZES has evolved considerably from 1955 to now. […] Gastrinomas commonly metastasize in the lymph nodes and sometimes arise in this site; hence, the resection of all the lymph nodes in the peripancreatic region is important, even if they do not appear swollen. […] It has also been reported that more than 50% of patients are free from disease after surgery and the majority of them remain so for the following 5-10 years. […] In conclusion, chemotherapy is not the treatment of first choice in patients with gastrin secreting tumors, but seems to be indicated in rapidly evolving tumors in which the mass of the primary tumor increases more than 25% in a period of follow-up of 12 mo or in which the tumoral symptoms cannot be treated by other means.

• #75 Gastrinoma – Wikipedia

  https://en.wikipedia.org/wiki/Gastrinoma

  Recently, research studies have been conducted to seek new medical advances in relation to gastrinoma and Zollinger-Ellison syndrome. The recent studies have shown improved understanding of pathogenesis of pancreatic neuroendocrine tumors, classifications of those tumors, new treatments/preventions to control the gastrin levels in the gastrointestinal tract, and the best and safest surgical approaches.

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