Endocrine tumors. Men (multiple endocrine neoplasia) is a constellation of symptoms from tumors of the endocrine or glandular system. There are 3 kinds: men 1 involving the pancreas, pituitary, and parathyroid glands; men 2a involving the thyroid, adrenals (pheochromocytoma), and possibly the parathyroid; and men 2b or men 3 which involves the thyroid, adrenal, and mouth/eyes (benign). Men 3 is the most severe.
Endocrine neoplasia. The term multiple endocrine neoplasia (men) encompasses several distinct syndromes featuring tumors of endocrine glands, each with its own characteristic pattern. In some cases, the tumors are malignant, in others, benign. Benign or malignant tumors of nonendocrine tissues occur as components of some of these tumor syndromes.