Cole and Crump,1in 1920. reported 2 cases of Kaposi's sarcoma, in 1 of which it was complicated with lymphatic leukemia. A case of Kaposi's sarcoma and lymphatic leukemia was recorded in 1931 by Hufnagel and Dupont.2Another instance of lymphoblastoma (mycosis fungoides) and hemorrhagic sarcoma of Kaposi was described by Lane and Greenwood3in 1933. Our patient was presented before the Manhattan Dermatological Society in 1943, by Dr. I. Rosen.4The reasons for this report are, first, the small number of reported cases of the coexistence of the two diseases and, second, the unusual pathologic finding of the two diseases in the same lesion. REPORT OF CASE J. K., a Jew, born in Austria, aged 59 years, came to the Skin and Cancer Unit of the New York Post-Graduate Medical School and Hospital on Jan. 11, 1943. The patient had