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患者男性，63岁，因间歇性便血3年来诊。直肠指诊：距肛门缘1cm处可及肿物，约3×4×2cm3，质硬、固定、表面凹凸不平，指套染血。直肠镜报示直肠癌。胸透、B超未见异常；进行直肠癌根治术，术时探查肝表面可及一结节，予切除并送病理。术中发现肿物未侵及防脱、前列腺或尿道。
The patient was male, 63 years old, diagnosed with intermittent hematuria for 3 years. Rectal examination: from the edge of the anus can reach the tumor mass, about 3 × 4 × 2cm3, hard, fixed, uneven surface, finger sets of blood. Rectaloscopy reports rectal cancer. Chest and B-ultrasound were not abnormal. The patients underwent radical resection of rectal cancer. During the operation, the surface of the liver was explored and a nodule was removed. The resection was performed and the pathology was sent. Intraoperative findings revealed that the tumor did not invade anti-dropout, prostate, or urethra.