Fig 2.

A 68-year-old woman presented with clumsiness, dropping things from her right hand, difficulty speaking, and right facial droop. A, T2-weighted axial FSE image of the brain shows patchy areas of increased T2-signal-intensity edema surrounding a low T2-signal-intensity lesion at the left temporal and frontal parietal lobes. B, T1-weighted postcontrast axial spin-echo image of the brain shows irregular and patchy enhancement of the lesion. Surrounding edema is seen as a low T1 signal intensity. A biopsy of the mass was performed, and CD20-positive B-cell lymphoma was diagnosed.