病历摘要:患者男,64岁。7年前无明显诱因,感左下腹隐痛且有便意,排便后腹痛缓解。近3年来大便每日2～次,多为黄色糊状便。查体:体温36.2℃,脉搏84次/分,血压180/110mmHg。心肺未见异常。腹软无压痛,未触及包块,肠鸣音稍亢进。血红蛋白115g/L,红细胞4.09×10~(12)/L,白细胞8.6×10~9/L, Medical record summary: Patient male, 64 years old. 7 years ago, no obvious incentive to feel pain and left lower extremity with meaning, relieve abdominal pain after defecation. Nearly 3 years stool daily 2 ~ times, mostly yellow paste. Physical examination: body temperature 36.2 ℃, pulse 84 beats / min, blood pressure 180 / 110mmHg. Heart and lung no abnormalities. Abdominal tenderness without tenderness, did not touch the mass, bowel sounds slightly hyperthyroidism. Hemoglobin 115g / L, red blood cells 4.09 × 10-12 / L, white blood cells 8.6 × 10-9 / L,