粒细胞减少症是医生与病人经常关注的疾病。本文将介绍新的发病理论,并结合实践经验,讨论三个问题:一、临床要点粒细胞减少症与粒细胞缺乏症并非两种疾病,仅系粒细胞减少程度的差别。一般采用标准为:正常粒细胞计数>2,000/mm~3。而粒细胞减少症根据粒细胞减少的程度分为:轻度1,000～2,000/mm~3中度500～1,000/1.000/mm~3,重度<500/mm~3。这种人为之分级,有助于对本病并发感染的预测,但除其 Granulocytopenia is a disease that doctors and patients often pay attention to. This article will introduce a new theory of pathogenesis, combined with practical experience, to discuss three issues: First, the clinical features of neutropenia and agranulocytosis are not two diseases, only the degree of neutropenia difference. The general adoption criteria are: normal neutrophil count> 2,000 / mm ~ 3. And neutropenia according to the degree of neutropenia is divided into: mild 1,000 ~ 2,000 / mm ~ 3 moderate 500 ~ 1,000 / 1.000 / mm ~ 3, severe <500 / mm ~ 3. This kind of human grading helps in predicting the concurrent infection of this disease, but excluding it