Ph1-positive acute leukemia in a patient with Hodgkin's disease treated by irradiation and chemotherapy.

A case of acute undifferentiated leukemia with a Ph1-chromosome and a typical translocation t(9;22) is reported in a 54-year-old female with Hodgkin's disease. The interval from diagnosis of Hodgkin's disease to the development of acute leukemia was 19 months. Treatment of Hodgkin's disease consisted of combined cytotoxic therapy including irradiation and chemotherapy. Detection of Ph1-chromosome in undifferentiated blasts supports the suggestion of leukemogenic chromosomal aberration within uncommitted hemopoietic cells.