title: Auer rods in mature granulocytes and monocytes.
abstract: In a 73-year-old man with acute myelomonocytic leukemia (M4 on FAB classification) Auer rods were demonstrated in mature granulocytes and monocytes in the blood as well as the bone marrow. Cytochemically, a significant number of leukemic blasts were positive for both alpha-naphthyl-acetate esterase and naphthol-AS-D-chloroacetate esterase. Auer rods in mature granulocytes were associated with immature cytoplasm and not infrequently with pseudo-Pelger anomaly. The significance of these observations is discussed.
mesh_terms: D000368:Aged; D006098:Granulocytes / Q000648:ultrastructure*; D006801:Humans; D002479:Inclusion Bodies / Q000648:ultrastructure*; D015470:Leukemia, Myeloid, Acute / Q000097:blood; D008297:Male; D009000:Monocytes / Q000648:ultrastructure*