乳腺错构瘤,是一种少见的乳腺良性肿瘤。肿瘤有完整的包膜,由数量不等、杂乱无章的乳腺导管、小叶和成熟的脂肪及纤维组织混杂组成。国内外少见大组病例报告,天津市肿瘤医院1997～1998年共收治该病23例,报告如下。临床资料　1997～1998年活检病案中3876例乳腺良性病变经组织学 Breast hamartoma is a rare benign breast tumor. The tumor has a complete envelope consisting of a heterogeneous, disorganized array of breast ducts, leaflets, and mature fat and fibrous tissue. The rare cases at home and abroad were reported in a large group. Twenty-three cases of the disease were treated in Tianjin Cancer Hospital from 1997 to 1998. The report is as follows. Clinical data 3876 cases of breast benign lesions were histologically diagnosed during biopsy from 1997 to 1998