Ectopic Cushing?s syndrome

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Ectopic Cushing?s syndrome

Ectopic Cushing's syndrome is a condition caused by an ACTH-secreting tumor outside the pituitary or adrenal glands.

Cushing's syndrome isthe result ofexcess glucocorticoid hormones secreted over a long period of time. About 15% of Cushing's syndrome casesare due to ectopic Cushing's syndrome.

Ectopic Cushing's syndrome is caused by tumors that secrete adrenocorticotropic hormone (ACTH). Other causes of Cushing's syndrome are oversecretion of ACTH by the pituitary gland, a tumor of the adrenal gland, or long-term administration of corticosteroid drugs commonly used to treat conditions such as rheumatoid arthritis and asthma.

Small cell tumors of the lung, tumors of the thymus gland, islet cell tumors of the pancreas, and medullary carcinoma of the thyroid are tumors that can secrete ACTH, although this occurs rarely.

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