Whipple's disease confined to the central nervous system.

We report a 49-year-old woman with a left parietal lesion, shown on CT and MRI as an isolated ring-enhancing mass. The diagnosis of cerebral Whipple's disease was made by brain biopsy; there were no gastrointestinal symptoms nor periodic-acid Schiff-positive inclusions in the jejunal mucosa. This case illustrates atypical Whipple's disease, confined exclusively to the central nervous system.