<unk>  (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.<unk>  is a sub-type of MEN<unk>  endocrine neoplasia) and itself has sub-types, as discussed below.
Multiple endocrine neoplasia type 2
Multiple endocrine neoplasia type 1
Autoimmune polyendocrine syndrome type 1
Autoimmune polyendocrine syndrome type 2
Autoimmune polyendocrine syndrome type 3
McCune–Albright syndrome
Lightwood–Albright syndrome
Late onset congenital adrenal hyperplasia