A nonsecreting suprasellar ectopic pituitary adenoma: A case report.

A pituitary adenoma in the suprasellar region without involvement of the Sella turcica is uncommon, with few examples recorded in the literature. Imaging, particularly magnetic resonance imaging, is critical for diagnosis. Radiological features aid in distinguishing ectopic pituitary adenoma from other possible diagnoses, which include Rathke cleft cyst, suprasellar abscess, diabetes insipidus, suprasellar cellular infiltrate, and suprasellar tumors such as germinoma, craniopharyngioma, optic pathway glioma, suprasellar hemangioblastoma, and pituitary lymphoma. A 48-year-old lady with impaired visual acuity underwent an MRI, which revealed a suprasellar ectopic pituitary adenoma in contact with the pituitary stalk and optic chiasm.