A Rare Case of Concomitant Small Lymphocytic Lymphoma and Kaposi's Sarcoma in the Same Lymph Node Biopsy

Small Lymphocytic Lymphoma (SLL) and its leukemic variant, Chronic Lymphocytic Leukemia (CLL), are the most common B-cell lymphomas in western countries. In CLL/SLL, cutaneous or mucous membranes lesions occur in up to 25% of patients: infection or hemorrhage are the most common aetiologies, but they can also be an early manifestation of skin malignancy, as, when compared with normal population, in CLL/SLL skin cancer risk is increased eightfold. Herein, we describe a case in which Kaposi Sarcoma (KS) and SLL were contemporary diagnosed in the same lymph node biopsy: concomitant diagnosis of KS and CLL/SLL is rare, and even rarer is the observation of the coexistence of both diseases in the same biopsy.