Multiple Endocrine Neoplasia Type 1 (MEN1)

Multiple Endocrine Neoplasia Type 1 (MEN1) is a rare inherited disorder that affects the body's hormone-producing glands. It primarily involves the parathyroid glands, pancreas, and pituitary gland, which are part of the endocrine system. People with this condition develop tumors in these glands, which can cause an overproduction of hormones leading to various health problems. Common symptoms include kidney stones, stomach ulcers, and abnormal growths. The condition is caused by a genetic mutation and often runs in families. Early detection is important because the tumors can sometimes become cancerous or cause serious complications. Management focuses on monitoring and treating hormone imbalances and tumors.

Multiple Endocrine Neoplasia Type 1 (MEN1) is an autosomal dominant syndrome characterized by the development of multiple endocrine tumors, primarily affecting the parathyroid glands, pancreatic islet cells, and anterior pituitary gland. It results from germline mutations in the MEN1 gene, which encodes the tumor suppressor protein menin. Loss of menin function leads to unregulated cell proliferation and tumor formation. The hallmark clinical features include primary hyperparathyroidism, pancreatic neuroendocrine tumors (such as insulinomas or gastrinomas), and pituitary adenomas (commonly prolactinomas). These tumors cause hormone hypersecretion syndromes and can lead to significant morbidity. Diagnosis is critical due to the risk of malignancy and the need for lifelong surveillance. MEN1 is a prototype of hereditary tumor syndromes involving multiple endocrine organs.