Glucagonoma

Glucagonoma is a rare type of tumor that develops in the pancreas, specifically in the cells that produce the hormone glucagon. This hormone helps regulate blood sugar levels by raising glucose in the bloodstream. When a glucagonoma forms, it causes an excessive release of glucagon, leading to high blood sugar and other symptoms. People with this condition often experience a distinctive skin rash called necrolytic migratory erythema, along with weight loss, diabetes, and mouth sores. The tumor affects the endocrine system, which controls hormone production, and can significantly impact overall health by disrupting normal metabolism.

Glucagonoma is a rare neuroendocrine tumor arising from the alpha cells of the pancreatic islets, characterized by excessive secretion of glucagon. This hormone excess leads to a clinical syndrome marked by hyperglycemia, necrolytic migratory erythema, weight loss, anemia, and mild diarrhea. The tumor is usually malignant and may metastasize, most commonly to the liver. The pathophysiology involves glucagon-induced catabolic effects on protein and fat metabolism, causing the characteristic skin and systemic symptoms. Diagnosis is important due to the tumor’s potential for malignancy and the severe metabolic disturbances it causes. It is often associated with multiple endocrine neoplasia type 1 (MEN1) but can also occur sporadically.