患者女,65岁。1984年2月因左乳腺外上象限肿物在外院诊断为乳腺癌,行改良根治术。术后病理:病灶大小约4 cm×5 cm×4 cm,为乳腺低分化腺癌,腋窝淋巴结阴性,病理分期pT2N0M0。术后给与胸壁、内乳及锁骨上下野放疗,D_T50 Gy/25次,未行化疗。2006年11月发现右乳腺肿物在山东省肿瘤医院就诊。查体:右乳外上象限可触及3 cm× Female patient, 65 years old. February 1984 due to the left upper quadrant of the outer tumor in the hospital for the diagnosis of breast cancer, modified radical mastectomy. Postoperative pathology: lesion size of about 4 cm × 5 cm × 4 cm, poorly differentiated adenocarcinoma of the breast, axillary lymph nodes negative pathological stage pT2N0M0. Postoperative chest wall, the milk and clavicle up and down radiotherapy, D_T50 Gy / 25 times, no chemotherapy. In November 2006, a right breast tumor was found in Shandong Tumor Hospital. Physical examination: right upper quadrant outside the reach of 3 cm ×