肛门周围和肛门的基底细胞癌(BCC)相当少见,这一相对良性癌肿与其它肛门更恶性肿瘤的鉴别很重要,因为它们在组织学上非常相似。报告一例患有肛门后方溃疡的82岁女性病人,其发生时间不详,该部位无放射治疗史。检查可见紧接肛门后方皮肤并侵及臀裂两侧有一3×4厘米界限清楚的溃疡,边缘硬而苍白,溃疡中心呈红色。肛门 Perianal and anal basal cell carcinoma (BCC) is relatively rare. The identification of this relatively benign cancer and other more malignant anal tumors is important because they are histologically very similar. An 82-year-old female patient with an ulcer behind the anus was reported and the time of its occurrence was unknown. There was no history of radiation therapy at this site. The examination revealed a 3×4 cm well-defined ulcer on both sides of the skin behind the anus and invading the gluteal cleft. The edges were hard and pale and the center of the ulcer was red. anus