Figure 9a. Pituitary apoplexy in a 44-year-old woman who developed headaches 3 weeks after childbirth. Her prolactin level was 19.9 ng/mL. (a) Coronal T1-weighted MR image shows an enlarged, poorly enhancing pituitary gland (arrow). (b) MR image obtained 4 weeks later shows atrophy of the pituitary with a partial empty sella appearance.