Pituitary choristoma

Radswiki et al.

Pituitary choristomas, also known as granular cell tumours of the pituitary, is a somewhat controversial term which in the past was thought to be equivalent to a pituicytoma, but in fact represent a histologically separate entity.


Granular cell tumours of the pituitary are composed of sheets of large polyhedral cells, with abundant eosinophilic cytoplasm filled with periodic acid-Schiff–positive granules 1-2. They have only focal spindled areas (in contrast to pituicytomas). They are usually negative for GFAP 2.

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Article Information

rID: 12814
Section: Pathology
Synonyms or Alternate Spellings:
  • Granular cell tumour of the pituitary

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