Fig. 2.

A 44-year-old female with worsening right-sided weakness and a history of Bechet’s disease, eight months after previous MRI images displayed in Figure 1. (A-F) MRI axial views of pons, using T1-weighted, T2-weighted, and FLAIR sequences. (G-L) MRI axial views of midbrain, using T1-weighted, T2-weighted, and FLAIR sequences. Findings: Markedly abnormal brainstem with expansile T2 hyperintense signal involving almost the entire pons (A-F), extending into ventral medulla/medullary pyramids, midbrain and cerebral peduncles (G-L) (asymmetrically greater on the left side), significantly progressed since the prior MRI. Technique: Multiplanar, multisequence MRI of the brain/brainstem was performed without and with intravenous contrast, 15 mL of Prohance.