[Immunological cell markers on lymphoblasts of patients with acid phosphatase positive acute leukemia (author's transl)].

Blast cells of 4 patients with acid phosphatase positive acute leukemia were investigated for T and B lymphocyte markers. Nearly all blast cells showed a typical T cell marker, namely spontaneous rosette formation with sheep red blood cells. No surface immunoglobulin was demonstrable on these cells. 3 of these 4 patients showed an enlargement of the upper mediastinum most probably due to the thymus. The conclusion is drawn that the acid phosphatase positive acute leukemia is a T cell leukemia. Some clinical data about these 4 patients are given.