title: Subcutaneous lateral internal sphincterotomy (SLIS)--a safe technique for treatment of chronic anal fissure.
abstract: OBJECTIVE
  Subcutaneous lateral internal sphincterotomy (SLIS) is an effective treatment for fissure in ano but carries a definite risk of incontinence. The aim of this study was to assess the efficacy and complications of SLIS in patients with chronic fissure in ano.
  
  
  METHODS
  All patients presenting with a chronic anal fissure who underwent SLIS were entered into a prospective database. This is a review of these patients over 5 year's period (September 2002-2007). All operations were performed or directly supervised by a consultant colorectal surgeon. Short-term follow-up was at the first outpatient appointment (6 weeks postoperatively) and any impairment of continence was documented.
  
  
  RESULTS
  During the study period of 5 years, 96 patients underwent SLIS at our institution. Median patient age was 45 years (range 19-81). The median duration of symptoms was 65 days. No fissure failed to heal after SLIS. Minor complications were noted in five patients; 85% (82/96) attended the follow-up and out of these, 6% (5/82) reported early incontinence. One patient was incontinent to flatus, one to liquid and three to solid stool. After 12 weeks of follow-up, two patients were completely symptom free, one was incontinent to flatus and two were incontinent to liquid stool.
  
  
  CONCLUSIONS
  SLIS remains an effective treatment for chronic anal fissure. A small proportion of patients do suffer from faecal incontinence, which may be permanent in some cases. Careful patient selection and proper surgical training can reduce this risk.
authors.affiliation: Queen Alexandra Hospital, Portsmouth, Hampshire, PO6 3LY, UK.
authors.forename: Jim S
authors.initials: JS
authors.lastname: Khan
authors.forename: Neil
authors.initials: N
authors.lastname: Tan
authors.forename: Dariush
authors.initials: D
authors.lastname: Nikkhah
authors.forename: Andrew J G
authors.initials: AJ
authors.lastname: Miles
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002908:Chronic Disease; D003710:Demography; D013505:Digestive System Surgical Procedures / Q000009:adverse effects / Q000379:methods*; D005260:Female; D005401:Fissure in Ano / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011182:Postoperative Care; D012449:Safety; D014549:Urinary Incontinence / Q000209:etiology; D055815:Young Adult