1. Monoblastic leukemia (M5a) with chronic basophilic leukemia in a cat.
- Author
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Shimoda T, Tanabe M, Shoji Y, Kanda T, Kishida K, Kishida A, Hashimoto A, Otsuka M, Miyamoto A, Kawakita T, Oshita W, Hirao R, and Suwa A
- Subjects
- Animals, Basophils, Bone Marrow, Cats, Cat Diseases diagnosis, Leukemia, Basophilic, Acute diagnosis, Leukemia, Basophilic, Acute veterinary, Leukemia, Monocytic, Acute diagnosis, Leukemia, Monocytic, Acute veterinary, Leukemia, Myeloid, Acute veterinary
- Abstract
A cat was presented with depression and anorexia. The complete blood cell count (CBC) revealed non-regenerative anemia (PCV, 8.5%), marked thrombocytopenia (2,400/µl), and leukocytosis (32,090/µl). In the peripheral blood, proliferation of blast cells (85%; 27,276/µl) and basophils (7.7%; 2,460/µl) was observed. Bone marrow aspirate showed hyperplasia with 8.8% blasts and 90.2% basophils of all nucleated cells. The blast cells were negative for myeloperoxidase staining and positive for alpha-naphthol butyrate esterase staining, indicating the agranular blasts are monoblasts. Thus, acute monoblastic leukemia (M5a) with chronic basophilic leukemia was diagnosed. Basophils accounted for more than 40% of the bone marrow, and we diagnosed secondary basophilic leukemia. Secondary basophilic leukemia should be included in the differential list when abnormal basophil increases are observed in feline bone marrow.
- Published
- 2022
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