孤立性直肠溃疡综合征 ( SRUS)是一种少见的慢性良性疾病 ,主要表现为排便困难、血便、粘液便 ,乙状结肠镜发现直肠黏膜红斑、溃疡或息肉。发病机制尚不清楚 ,隐性或显性的直肠脱垂和盆底肌肉的反常收缩压迫直肠黏膜 ,可能导致局部损伤或局部缺血 ,形成溃疡。大多数保守治疗效 Solitary rectal ulcer syndrome (SRUS) is a rare chronic benign disease, mainly manifested as defecation difficulty, bloody stools, mucus, sigmoidoscopy found rectal mucosa erythema, ulcers or polyps. The pathogenesis is unclear. Recessive or overt rectal prolapse and abnormal pelvic floor muscle contraction oppression rectal mucosa, may lead to local injury or ischemia, the formation of ulcers. Most conservative treatment effect