Objective To investigate the value of bone marrow smear,biopsy and chromosome examination in the diagnosis of pancytopenia. Methods Results of bone marrow smear,biopsy and chromosome examination of 206 patients with pancytopenia were analyzed. Results In the 206 patients,the diagnosis of pancytopenia was confirmed in 194 by bone marrow smear with diagnosis rate of 94.2%.The diagnosis rate of bone marrow smear was 51.0%,that of bone marrow biopsy was74.3%,and that of bone marrow smear plus biopsy was 85.9%,t...