Ⅰ类切口非预防性使用抗菌药物后我院行乳腺癌改良根治术126例,其中有3例术后并发切口感染,现报道如下。1病例1.1病例1女性,58岁,以右乳肿块两年入院。右乳外上限质硬肿块,大小约3cm×3cm,腋窝及锁骨上下未触及肿大淋巴结,空心针穿刺提示右乳浸润性癌。右乳癌改良根治 Ⅰ class incision non-prophylactic use of antibiotics in our hospital after radical mastectomy 126 cases, of which 3 cases of postoperative concurrent incision infection, are reported below. 1 Case 1.1 Case 1 Female, 58 years old, with right breast lumps admitted to hospital for two years. The right upper outer breast hard mass, the size of about 3cm × 3cm, armpit and clavicle did not touch the swollen lymph nodes, hollow needle puncture tips right breast invasive carcinoma. Right breast cancer improved radical cure