[Ring-shaped inclusions in an uncommon variety of acute myeloid leukemia (author's transl)]

In cells of an acute, predominantly promyelocytic differentiated leukemia ring-shaped inclusions could be demonstrated by light- and electron-microscopic examinations. The patient showed good response to aggressive chemotherapy with complete remission. It is discussed, how far the presence of these morphological characteristics will have any bearing on the classification of this variety of leukemia.