患者，男，37岁。因肛门内疼痛8无伴脓血便5天，于1999年3月16日来院就诊。患者自述于3月8日始感肛门内疼痛，呈持续性逐渐加重，给氨个青霉素、甲硝叹等药物应用无效。3天后，解大便带有少许脓血，外院按细菌性痢疾给氟所酸、美丰等药物治疗，症状仍无缓解。辗转三家医院均按? Patient, male, 37 years old. Due to anal pain 8 without pus and blood will be 5 days, on March 16, 1999 to hospital. Patient readme on March 8 began to feel anal pain, was gradually increased, to ammonia penicillin, metronidazole and other drugs ineffective. Three days later, the solution of stool with a little sepsis, the outer courtyard by bacterial dysentery to Fluoro acid, Mei Fung and other drugs, the symptoms still did not ease. Three hospitals were removed?