全血细胞减少症是指外周血液中白细胞、红细胞及血小板均有不同程度的减少。它是多种病因作用的结果,并不是一种独立的疾病,是临床比较常见的一种血液学表现。病因复杂,按照病因分类,可以分为造血系统疾病和非造血系统疾病两大类。 Pancytopenia refers to peripheral blood leukocytes, red blood cells and platelets have varying degrees of reduction. It is the result of a variety of etiological effects, is not an independent disease, is a more common clinical hematological manifestations. Etiology is complex, according to the cause of the classification, can be divided into two major categories of hematopoietic system diseases and non-hematopoietic system diseases.