A case of intraventricular primary central nervous system lymphoma.

We report a case of primary central nervous system lymphoma presenting as multiple intraventricular masses in an immunocompetent 68 year old man with severe headache and unsteady gait. The diagnosis was obtained by analysis of the cerebrospinal fluid and subsequent surgical biopsy. This is an unusual appearance for primary central nervous lymphoma, with the majority of the cases presenting as solitary masses.