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Bone marrow biopsy with T/myeloid mixed-phenotype acute leukemia as demonstrated by H&E stain with 80% blasts. (a) 200x and immunohistochemical stains for terminal deoxynucleotidyl transferase. (b) DAB, 200x, cytoplasmic CD3 with anti-CD3 (2GV6) rabbit monoclonal antibody against the epsilon chain. (c) DAB, 200x, and myeloperoxidase. (d) DAB, 200x.
