粒细胞肉瘤(GS)又称“绿色瘤”[1],是一种罕见的发生于髓外由未成熟的髓样细胞构成的髓外实质性肿瘤,易误诊为癌或者非霍奇金淋巴瘤[2]。现将我院收治1例报告如下。1病历简介病人女,29岁。因发现双乳肿块2个月于2012年7月入院。2个月前病人无意中发现双乳无痛肿块,两个月间 Granulocytic sarcoma (GS), also known as “green tumor” [1], is a rare extramedullary solid tumor consisting of immature myeloid cells that is misdiagnosed as cancer or non-Hodgkin Gold lymphoma [2]. Now in our hospital admitted to a report as follows. 1 medical records patient female, 29 years old. Due to the discovery of double breast mass 2 months in July 2012 admitted. 2 months ago, the patient inadvertently found no pain in breast milk mass, two months