Oncohematology

Auer Rods in Blasts in Acute Myeloid Leukemia

Morphology of Auer rods in myeloblasts in AML: mechanism of formation from abnormal primary granules and cytological features of blasts.

Blood smear: Auer rods in myeloblasts in acute myeloid leukemia
Blood smear: Auer rods in myeloblasts in acute myeloid leukemia

On a cytological preparation from a patient with acute myeloid leukemia, a large number of Auer rods were observed in blast cells. In one of the blasts, the stage of Auer rod formation was captured.

Auer rods are formed as a result of the fusion and aggregation of abnormal primary granules (lysosomes) containing myeloperoxidase and other lysosomal enzymes.

🔬 Source: from the archive of Brazilian hematology specialist Marcio Melo