Nasal cavity, paranasal sinuses, nasopharynx
Ectopic pituitary adenoma

Topic Completed: 1 November 2004

Revised: 5 June 2019

Copyright: 2004-2019,, Inc.

PubMed Search: Ectopic pituitary adenoma[TI]

Nat Pernick, M.D.
Page views in 2018: 1,082
Page views in 2019 to date: 604
Cite this page: Pernick N. Ectopic pituitary adenoma. website. Accessed October 19th, 2019.
Definition / general
  • 2% present as primary lesion of nasopharynx or nasal cavity
  • Some may arise as Rathke pouch remnants
  • Usually chromophobe type
  • Difficult to distinguish benign and malignant tumors by histology; must depend on presence of metastases; tumors with high MIB1 but p53- have uncertain malignant potential; tumors with high MIB1 and p53 expression act like carcinomas
Case reports
Microscopic (histologic) description
  • Rosette or ribbon pattern of polygonal cells with prominent, delicate vascular stroma
Differential diagnosis
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