simple method for treating chronic post-operative anal stricture

Thirty patients with postoperative anal stenosis were treated by a simple operation which comprises a posterior longitudinal incision whose length depends on the level of stenosis, the flaps were dissected, then a wedge-shaped posterior internal sphincterectomy of the lower one third of the internal sphincter was made, followed by mucosal advancement over the internal sphincter and suturing the mucosa to the perianal skin transversely. Average time of healing was 12 days. Calibration of the anus using Hegar's dilators revealed a preoperative caliber of 13.4 +/- 4.3 and a postoperative one of 25.3 +/- 0.0