乳腺叶状囊肉瘤是发生在女性中的一种少见病。虽命名为“肉瘤”，但主要表现为良性肿瘤特点。临床表现为乳腺巨大肿瘤、穿刺细胞学和其它辅助检查对其诊断帮助不大。易与其它乳腺良、恶性肿瘤相混淆。给诊治带来一定困难。我科自1991－1996年收治本病10例，报告如下。1临床资料 Breast cystosarcoma is a rare disease that occurs in women. Although named “sarcoma”, it is mainly characterized by benign tumors. The clinical manifestations of large tumors of the mammary gland, aspiration cytology and other auxiliary examinations do not help its diagnosis. Easy to be confused with other breast benign and malignant tumors. Difficulties in diagnosis and treatment. Our department has treated 10 cases of this disease from 1991-1996, the report is as follows. 1 clinical data