Diagnosis of chronic myelogenous leukemia in a dog using morphologic, cytochemical, and flow cytometric techniques.
Chronic myelogenous leukemia was diagnosed in a 3.5-year-old neutered male Golden Retriever. The diagnosis was based on persistent leukocytosis (>73.0X10(3)/microliter), composed of a proportionate left shift to progranulocytes with no evidence of underlying inflammation, infection, or neoplasia. Marked dysplasia was evident in neutrophils and platelets in peripheral blood. Bone marrow and splenic aspirates were dominated by mature and immature neutrophils with < 2% myeloblasts. Cytochemical and flow cytometric assays confirmed that cells in the peripheral blood and spleen were of committed neutrophil lineage. The dog responded initially to treatment with hydroxyurea, but developed acute undifferentiated leukemia approximately 83 days after initial presentation.
Tarrant
Jacqueline M.
JM
Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA. tstokol@rics.bwh.harvard. edu
Stokol
Tracy
T
Blue
Julia T.
JT
McDonough
Sean P.
SP
Farrell
Peter
P