MRI was performed and showed a 5-mm lesion in the pituitary gland consistent with a microadenoma. Except for headaches, the patient is asymptomatic. She has normal menses, her physical examination ...

Box 1. Differential diagnosis of a pituitary incidentaloma.

MRI uses high-powered magnets and radio waves to produce images of organs and structures inside the body. The MRI scanner is shaped like a building block with a very large hole in the middle where the ...