多形性腺癌又名混合瘤或复合性脉瘤，是一种常见肿瘤，但发生于乳腺者罕见。我们这有1例发生于乳腺的多形性腺瘤，现报告如下。1病例介绍患者女性，19岁，以左乳房无病性肿物1年人院。查体：身体一般状况佳。局部检查见左乳房有一肿物，如鸽卵大小，活动度良好，表面皮肤无充血 Polymorphic adenocarcinoma, also known as mixed tumor or compound tumor, is a common tumor, but rare in breast. We have one case of pleomorphic adenomas in the breast. The report is as follows. 1 Case Introduction The patient was female, 19 years old, with a disease-free mass of left breast for 1 year. Physical examination: The general condition of the body is good. Local examination showed that there was a mass in the left breast, such as the size of pigeon eggs, good activity, and no congestion on the surface skin.