A case of large cell CNS lymphoma associated with a systemic small cell lymphocytic lymphoma.

A case is reported of a 59 y/o woman with a large cell CNS lymphoma and a small cell lymphocytic lymphoma in the bone marrow. The brain tumor underwent spontaneous regression and subsequent regrowth while there was slow progression of the systemic small cell lymphoma. The CNS lymphoma regressed rapidly following treatment with prednisone and cyclophosphamide. We hypothesize that the small cell lymphoma in this patient may represent an underlying immunodeficiency disorder.