患者　男,58岁。以腹痛、右下腹肿块就诊。1年前右下腹痛,曾行阑尾切除术。查体:右下腹部扪及一肿块,大小约4.0ｃｍ×6.0ｃｍ,轻度压痛,肿物表面光滑,边界清,质硬,推之固定。大便潜血试验(+)。Ｂ超:右下腹探查见腹腔内一低回声区,大小12.7ｃｍ×10.5ｃｍ,边界不规则,内见多个大 Male patient, 58 years old. To abdominal pain, right lower abdomen mass treatment. Right lower quadrant a year ago, had appendectomy. Physical examination: Palpable lower right abdomen, a size of about 4.0cm × 6.0cm, mild tenderness, the tumor surface is smooth, clear boundary, hard, push the fixed. Fecal occult blood test (+). B-ultrasound: see the right lower abdomen exploration intra-abdominal a hypoechoic area, the size of 12.7cm × 10.5cm, the boundaries of irregular, see a number of large