颗粒细胞瘤(granular cell tumor)是一种少见的软组织良性肿瘤,可以发生于任何部位,大多数位于头颈部,发生于乳腺者少见。本文报道1例乳腺颗粒细胞瘤,分析该肿瘤的临床病理特征、影像学、免疫组化特点及诊断和鉴别诊断要点,并结合文献进行讨论。1材料与方法1.1临床资料患者女性,26岁。发现左乳无痛 Granulocytoma (granular cell tumor) is a rare benign soft tissue tumors can occur in any part of the majority of head and neck, occurred in the breast are rare. This article reports a case of breast granulosa cell tumor, analysis of the clinical and pathological features of the tumor, imaging features, immunohistochemistry and diagnosis and differential diagnosis points, combined with the literature to discuss. 1 Materials and Methods 1.1 Clinical data Patients Female, 26 years old. No pain found in left breast