This contrast-enhancing sellar mass was read as a pituitary adenoma. Biopsy showed no adenoma, only normal pituitary architecture infiltrated by lymphocytes, suggesting lymphocytic hypophysitis. After treatment with prednisone for 1 month, the pituitary size decreased to normal.
MRI: magnetic resonance image.
Courtesy of Peter J Snyder, MD.
Graphic 132030 Version 1.0
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