Aspirate from an abdominal mass associated with the intestine in an old cat. The mass is composed of large numbers of lymphoid cells with bright red intracytoplasmic granules with a clear halo. The granules are readily visualized in the cells highlighted by the red arrows. The results are compatible with a lymphoma of granular lymphocytes. This is a particular type of lymphoma that usually arises in the ileum and readily metastasizes to mesenteric lymph nodes, liver and spleen. This type of lymphoma is either of cytotoxic T cell or natural killer cell origin and is poorly responsive to standard lymphoma chemotherapeutic protocols.