MICROGRANULAR ACUTE PROMYELOCYTIC LEUKEMIA - DISTINCT CLINICAL, ULTRASTRUCTURAL, AND CYTOGENETIC ENTITY

  • 1 January 1980
    • journal article
    • research article
    • Vol. 55 (2), 253-259
Abstract
Three patients with acute leukemia, disseminated intravascular coagulation and a specific acquired chromosome abnormality [t (15;17)] were found by transmission electron microscopy to have the typical distribution of granules seen in promyelocytes. Average granule sizes were 120, 170 and 180 nm, respectively, for the 3 patients, significantly less than the 250 nm resolution of light microscopy. The leukemia in these 3 patients was regarded as comprising a distinct clinical, ultrastructural and cytogenetic entity called microgranular acute promyelocytic leukemia.