Ectopic pituitary neuroendocrine tumors are exceedingly rare entities that are often misdiagnosed. The resulting delay in diagnosis may be particularly concerning in the case of Cushing syndrome caused by an ectopic Corticotroph adenoma (ectopic adrenocorticotropic hormone (ACTH)-secreting pituitary neuroendocrine tumor).

see Ectopic corticotroph adenoma.