Pituitary adenoma CT

Pituitary adenoma Microchapters
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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]

Key CT Scan Findings in Pituitary Adenoma

Macroadenoma

• A solid suprasellar mass that typically has an attenuation similar to brain (30-40 HU) and demonstrates moderate contrast enhancement is highly suggestive of pituitary macroadenoma.
• Calcification and hemorrhage are rarely seen.

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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).