Pituitary adenoma CT

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Ahmad Al Maradni, M.D. [2]

Overview

Head CT scan may be helpful in the diagnosis of pituitary adenoma. Findings on CT scan suggestive of pituitary adenoma include a large suprasellar mass that invade surrounding structures, calcification, and rarely hemorrhage.

Key CT Scan Findings in Pituitary Adenoma

Macroadenoma

  • An attenuation similar to that of the brain (30-40 HU)
  • Moderate contrast enhancement
  • Invasion of the surrounding structures

Microadenoma

  • Historically, before the advent of MRI, the pituitary was imaged with CT scan.
  • Although CT scan is able to detect up to 80-90% of microadenomas (5-10mm in size), it has less sensitivity to smaller adenomas (less than 5mm in size).[1]

References

  1. 1.0 1.1 Pituitary Macroadenoma. Dr Bruno Di Muzio and Dr Yuranga Weerakkody. Radiopaedia.org 2015. http://radiopaedia.org/articles/pituitary-macroadenoma-1
  2. age courtesy of Dr Gagandeep Choudhary. http://www.radiopaedia.org Radiopaedia (http://radiopaedia.org/cases/pituitary-macroadenoma). http://radiopaedia.org/licence Creative Commons BY-SA-NC.