Most primary CNS non-Hodgkin lymphomas are of B-cell lineage. Only a very few immunocytochemically well documented cases of T-cell lymphomas have been reported. We report a case of a high malignant T-cell lymphoma localized primarily to the vermis of the cerebellum and compare the characteristics of the clinicopathological presentation with those of B-cell lymphomas as well as with the other T-cell lymphomas reported.