Cutaneous Lesions in Monocytic Leukemia

Monocytic leukemia is much less frequent than either the myeloid or the lymphoid type. In 600 consecutive cases of leukemia, Rosenthal and Harris 1 reported a relative incidence of 66.7 per cent myeloid, 27.6 per cent lymphoid and 1.9 per cent monocytic leukemia. In a total of 76 cases studied over four years, Doan and Wiseman 2 found 37 per cent myeloid leukemia, 47 per cent lymphoid and 16 per cent monocytic. Specific lesions of the skin, however, occur more frequently in monocytic leukemia than in the other types, i. e., in approximately 10 per cent of monocytic, 8 per cent of lymphoid and 1 per cent or less of myeloid. Yet the literature contains descriptions of only a small number of cases of monocytic leukemia with specific lesions of the skin. The object of the present paper is to present the cutaneous lesions and the autopsy data in 2