白血病是白细胞造血组织的肿瘤性无限制增生的后果。急性白血病如果有急骤发病、高烧、严重贫血、自发出血倾向以及在末梢血或骨髓中发现大量原始细胞等典型表现时,诊断自无困难。但近年来不典型的病例似有逐渐增多之趋势,如首都医院迄1959年6月为止的283例白血病中有不典型者20例、占7％;而1973年国外报道之一组132 Leukemia is the consequence of unlimited neoplastic proliferation of leukocyte hematopoietic tissue. Acute leukemias are self-diagnosing if they are characterized by sudden onset, high fever, severe anemia, spontaneous bleeding tendency, and the presence of large numbers of blasts in peripheral blood or bone marrow. However, atypical cases in recent years seems to be gradually increasing trend, such as the capital hospital as of June 1959 until 283 cases of atypical leukemia in 20 cases, accounting for 7%; and 1973, a group of 132