Ipilimumab Induced Hypophysitis: MRI Findings in a Series of 3 Cases.

ypophysitis is a reported compli- cation of ipilimumab, a monoclo- nal antibody which augments T- cell response against tumors. The imaging changes in the pituitary may precede or coincide with the hypopituitarism, but are frequently over- looked due to the subtle alteration in size and en- hancement characteristics. We present a series of 3 patients who developed hypophysitis and pituitary dysfunction subsequent to ipilimumab therapy and describe the MR imaging features and make follow up recommendations.