Morphologic, immunologic, and cytogenetic (MIC) working classification of acute lymphoblastic leukemias. Report of the workshop held in Leuven, Belgium, April 22-23, 1985. First MIC Cooperative Study Group.

The classification of the acute leukemias requires close collaboration among several disciplines, including cytomorphology, immunology, and cytogenetics. Continual investigations in the subtyping of acute lymphocytic and acute myelogenous leukemias, utilizing a common language, may be valuable in furthering our understanding of the pathobiology of these neoplasms as well as being of utmost importance to clinicians. The results of a Workshop held in Leuven, Belgium, have been summarized and are presented herein, taking into account the various approaches, and presenting criteria for the classification of various subtypes of B- and T-cell acute lymphocytic leukemia.