Question

zollinger - ellison syndrome is associated with which one of the following islet cell tumors?
insulinoma
medulloblastoma
gastrinoma
glucagonoma

Explanation:

Zollinger - Ellison syndrome is characterized by the presence of gastrin - secreting tumors (gastrinomas) in the pancreas or duodenum. Gastrinomas cause excessive production of gastrin, leading to increased gastric acid secretion and resulting in peptic ulcers and other gastrointestinal symptoms. Insulinomas are associated with hypoglycemia due to excessive insulin production. Medulloblastomas are brain tumors and not related to islet cell tumors. Glucagonomas are associated with hyperglycemia and other metabolic disturbances.

Answer:

C. Gastrinoma