NCIt definition : A syndrome characterized by abnormal secretion of adrenocorticotrophic hormone in
conjunction with neoplastic growth occurring anywhere in the body. The most common
associations are tumors of the bronchus (oat cell or carcinoid), thymic tumors (epithelial
or carcinoid), and pancreatic endocrine tumor. (DeVita et al. Cancer, p 1364. 4th
edition. Lippincott);
Alternative definition : NICHD: A condition characterized by excess corticosteroid concentration in response
to adrenocorticotropic hormone (ACTH) produced outside of the pituitary gland.;