[Cytology of acute leukemia].

Cytological analysis of peripheral blood and bone marrow films is a quick and simple method for diagnosis of acute leukemia. In association with cytochemistry techniques it allows the rapid identification and subsequent classification of most types of acute myeloid leukemias. Although morphological analysis can suggest the diagnosis of an acute lymphoblastic leukemia, it is necessary to have the corroborating evidence of immunological markers for confirmation. In addition, ultrastructural studies contribute to the identification of rare forms of acute myeloid leukemias (minimally differentiated, megakaryoblastic). Cytological studies have also proven useful for the follow-up activities of confirming complete remission and detecting relapses.