An 18 years-old man with Ph
1-negative CML treated with busulfan for one year in good control was admitted to the Aichi Cancer Center Hospital on March 12, 1984 because of moderate fever, splenomegaly and marked leukocytosis suggesting blastic crisis.
On admission, RBC was 511×10
4/cmm, Hb 15.0g/d
l and Ht 47.0%. WBC was 95,200/cmm with 75% blastic cells. Platelet was 10.4×10
4/cmm. Nucleated cell count in bone marrow was 669,000/cmm with 72.5% blastic cells.
The cytochemical and immunological study of blastic cells showed peroxidase (-), α-NB estrase (-), PAS (-), TdT (+), E-rosette (+), OKT3 (-), 4 (-), 6 (-), 8 (-), Tp120 (-), but Tp 40 which reacted with most T cells, thymocytes and activated T cells was strongly positive. The blastic cells did not reacted with B cell (B1, Ia, CALLA, SIg) or myelomonocyte (HL-1, 5, 21) related monoclonal antibodies. These data suggested that this crisis was lymphoblastic and of pre-T cell phenotype.
Combined chemotherapy with adriamycin, vincristine, cyclophosphamide and prednisolone was only temporarily effective, and the patient died of pneumonia on June 14, 1984.
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