The authors report a rare meningioma-primary cerebral B cell lymphoma association that occurred in an insulin-dependent type-I diabetic woman. The woman was initially operated on because of meningothelial meningioma of the fronto-basal region, and 2 months later showed a primitive-non-Hodgkin B cell lymphoma, localized in the same area as the meningioma. The published literature on the meningioma-primary cerebral lymphoma association is revised.