Lymphocytic hypophysitis: Spontaneous resolution on MRI with progression of endocrine defect

Lymphocytic hypophysitis is an uncommon condition that typically occurs dur ing the last trimester of pregnancy or in the postpartum period. Presentati on is of an anterior pituitary mass with varying degrees of pituitary dysfu nction, We present a case in which there was dramatic resolution of the pit uitary lesion on sequential MRI scanning. Despite this apparent resolution, however, the patient continues to have significant pituitary dysfunction.