文摘
Background Anal stenoses can be classified as acute, chronic, primary and secondary and lead to relevant impairment of the affected patients. While primary anal stenosis is usually congenital, secondary stenosis occurs as a result of chronic inflammatory processes of the anal canal or following therapeutic, especially proctologic procedures, or after radiation. Other causes include chronic laxative abuse or infection. Etiology In up to 90% of cases, chronic anal stenosis is secondary to hemorrhoidectomy. It occurs during the postoperative course in up to 10% of hemorrhoidectomies. Careful patient selection for anal surgery and an optimal proctology surgical technique are therefore the best prevention. Specifically, when performing a hemorrhoidectomy, tissue damage should be limited to achieve the best possible anoderm. Stapled hemorrhoidectomy is still controversial, and it is probably advantageous only in selected patients. Treatment A detailed history as well as physical and digital rectal examinations are essential for the success of anal stenosis treatment. Measurement of the residual diameter of the anal canal with Hegar dilators improves objectivity and comparability. A diet high in fiber is recommended for anal stenoses of all stages, which facilitates defecation and results in softer stools. Incidentally, stage-adapted treatment of anal stenoses taking into account the etiology has been proven. Surgical treatment is only indicated in higher-grade stenosis, which are generally treated with anoplasty. Supportive dietary measures should be continued postoperatively. In addition, the use of an anal dilators by the patient can help improve surgical success.