乳腺导管扩张症是临床较常见的乳腺炎性疾病,还被称为浆细胞性乳腺炎、粉刺性乳腺炎、导管周围乳腺炎、肉芽肿性乳腺炎等。从该病的病理发展过程看，这些命名只是反映了该病不同阶段的病理表现，最根本的病理变化是乳腺导管扩张，因此以乳腺导管扩张症命名最合理。乳腺导管扩张症随着病理过程的进展，不同时期常有不同的临床表现，可分为：导管扩张期、炎块期、脓肿期和瘘管期。不同的病期可采用不同的治疗对策。

Clinicopathologic features and treatment of mammary duct ectasia MA Rong. Department of Breast Surgery， Qilu Hospital of Shandong University, Jinan 250012, China Abstract Mammary duct ectasia is of common inflammatory disease of breast. It is also called plasma cell mastitis, comedo mastitis, periductal mastitis, granulomatous mastitis and so on. Its primary basic pathologic change is mammary duct dilation. So it is called mammary duct ectasia is more rational. According to its different clinicopathologic features, it can be divided into four stages: duct dilation, inflammatory mass, abscess and fistula. We may treat this disease with different strategy in different stage.