Nasal cavity, paranasal sinuses, nasopharynx
Other tumors
Pituitary adenoma

Author: Nat Pernick, M.D. (see Authors page)

Revised: 24 May 2018, last major update November 2004

Copyright: (c) 2004-2018,, Inc.

PubMed Search: Pituitary adenoma[TI] nasal

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Cite this page: Pernick, N. Pituitary adenoma. website. Accessed January 23rd, 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