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Multiple endocrine neoplasia type 2 (also known as 'Pheochromocytoma and amyloid producing medullary thyroid carcinoma', 'PTC syndrome,' and 'Sipple syndrome') is a group of medical disorders associated with tumors of the endocrine system. The tumors may be benign or malignant (cancer). They generally occur in endocrine organs (e.g. thyroid, parathyroid, and adrenals), but may also occur in endocrine tissues of organs not classically thought of as endocrine.MEN2 is a sub-type of MEN (multiple endocrine ...