患者 ,女 ,71岁。因突发性腹痛 ,伴恶心、呕吐 1h入院。查体 :浅表淋巴结无肿大 ,腹部触诊有肌紧张 ,呈“板状腹” ,全腹压痛、反跳痛 ,未触及包块 ,叩诊移动性浊音阴性 ,肠鸣音消失 ,肛诊( -)。无黑便及便血史 ,近 1个月来体重减轻约 5kg。右下腹穿刺抽出 10ml浑浊液体 ,常规 Patient, female, 71 years old. Due to sudden abdominal pain, with nausea, vomiting 1h admission. Examination: superficial lymph nodes without swelling, abdominal palpation with muscle tension, was “flat belly”, the whole abdominal tenderness, rebound tenderness, no palpable mass, percussion mobile voiced negative, bowel sounds disappear, anal (-). No meconium and history of blood in the stool, nearly 1 month weight loss of about 5kg. Right lower quadrant puncture out of 10ml turbid liquid, routine