1病例患儿,徐某,男,5岁,住院号:198183,因“排便困难5年”于2008年6月30日入院。现病史:5年前,患儿出生时其父母发现其排便困难,大便细,见其正常肛门前侧有一小孔溢出大便,患儿父母未带患儿求治,症状持续。入院后专科检查见:正常肛门处未见肛门口,向前2 cm处见一直径约0.3 cm小 1 case of children, Xu, male, 5 years old, hospital number: 198,183, due to “defecation difficulty for 5 years” in 2008 June 30 admission. Current history: 5 years ago, when a child was born, his parents found it difficult to defecate and had thin stools. A small hole in the front of the normal anus was found to overflow the stool. Children with and without their children sought treatment and the symptoms persisted. After admission specialist examination see: normal anus without anal, see a diameter of about 2 cm at a small diameter of about 0.3 cm