Lateral Internal Sphincterotomy

**Definition:** Surgical incision of the INTERNAL ANAL SPHINCTER typically in the treatment of FISSURE IN ANO; chronic ANAL FISSURE and FECAL INCONTINENCE.

**Tree numbers:** - E04.210.638 - E04.515.750.375

**Synonyms:** - Internal Sphincterotomy - Lateral Sphincterotomy - Lateral Internal Anal Sphincterotomy - Internal Anal Sphincterotomy