Unusual magnetic resonance imaging appearance of multiple cystic lesions in glioblastoma multiforme.

The differential diagnosis of multiple ring-enhancing intraaxial lesions includes neoplastic, infectious, inflammatory, demyelinating and vascular lesions. We report a case of a 41-year-old man who presented with a brief history of left lower extremity weakness and sensory loss. Magnetic resonance imaging demonstrated multiple ring-enhancing lesions in the right frontal and parietal lobes. Neuroradiology interpretation was felt to be unlikely for a neoplastic process. The patient underwent stereotactic brain biopsy, which was diagnostic for glioblastoma multiforme. This case demonstrates the importance of histological confirmation of intraaxial brain lesions whenever feasible. The course of his disease and treatment are discussed and the literature reviewed.