PRIMARY CNS LYMPHOMA - INFRATENTORIAL LOC ALIZATION AND PROLONGED SURVIVAL

A case of a 35-year-old woman presenting infratentorial CNS lymphoma i s reported. In 1990 she complained of diplopia, blurred vision and lef t horizontal nistagmus. An MRI disclosed a lesion in the medulla, pens , and cerebellar vermis and peduncles. Although no treatment was admin istered, a later RM[ showed less extension of the tumor. One year afte r clinical diagnosis, she received corticosteroids; during the second year a stereotaxic biopsy of the cerebellar lesion was done showing a diffuse B cell non-Hodgkin's lymphoma. A whole brain irradiation was g iven (50 Gy). She did well for five years, and remains alive (79 month s).