ABSTRACT
Objective To determine the diagnosis and the prognosis of acute bilineal leukemia(aBLL).Methods The cases who had been morphologicaUy diagnosed as acute leukemia were retrospectively screened.The characteristics of aBLL blasts and the patients'responses to chemotherapy and the survival rate were identified based on the analysis of both their clinical and laboratory data.Results From total of 352 cases screened,11 cases of aBLL were identified.The incidence of aBLL was 3.1%.Among them 4 were male and 7 female.The median age was 38 years old.The median counts of white blood cell at the onset of the disease was 56.3×109/L.There were more My/B aBLL subtype cases than My/T aBLL (8 cases vs.3 cases). Cytogenefie analysis data were available for 7 cages. All were standard karyotypes except 1 who had complex karyotypie change.The complete remission(CR)rate of chemotherapy was 45.5%(5/11)and the response rate(CR+PR)Wag 54.5%(6/11).Only 2 patients achieved CR after the first course of induction chemotherapy.The median of remission duration was 11 months,ranged from 3 to 14 months.The median of survival time was 10 month. ranged from 1 to 23 months. 1 patient died during the induction course.Conclusion aBLL is a rare subtype of acute leukemia.The diagnosis of the disease could be based on the combinational analysis of morphology and immunophenotype study.The patients'responses to the conventional chemotherapy regimens were not satisfied.Therefore,the prognosis of the disease was poor.