双侧原发性乳腺癌较少见,我院1980年～1996年手术治疗乳腺癌228例,经病理证实的双侧原发性乳腺癌仅3例,占乳腺癌的1.3％,现报告如下。 例1,女性,57岁。首次因左乳腺外上象限肿块1个月,直径1.5cm。于1981年9月1日行区段切除,术中病理证实为乳腺癌,立即施左全乳单纯切除术。术后病理诊断为左乳 Bilateral primary breast cancer is less common. In our hospital from 1980 to 1996, 228 cases of breast cancer were treated surgically. Only 3 cases of pathologically confirmed bilateral primary breast cancer accounted for 1.3% of breast cancer. The current report is as follows: . Example 1, female, 57 years old. For the first time, the mass was 1.5 cm in diameter in the upper quadrant of the left breast for 1 month. On September 1, 1981, resection was performed. The intraoperative pathology was confirmed as breast cancer. Immediately left sclerotinectomy was performed. Postoperative pathological diagnosis of left breast