Fistula-in-Ano

The term Fistula  is derived from a Latin word   which means pipe or tube. Fistula In Ano can be described as an abnormal inflammatory track which has  an internal opening in the anal canal or rectum and an external opening in the perianal skin .

• An acute abscess in one or more potential spaces around anorectal canal.
• Source of infection could be a number of predisposing conditions like :-
  • Infected and inflamed condition of the anal crypts (crypto glandular apparatus). Crypto -glandular – 90%
  • Infection from hair follicles.
  • Infection from an ulcer at the root of the pile mass.
  • Infected sebaceous glands.
  • Infected sweat glands.
  • Anal fissures
  • Foreign body penetrating from outside.
  • Traumatized mucocutaneous lining of anorectal canal due to undigested foreign body. e.g. fish bone etc.
  • Inflammed/ thromobosed previously existing pile masses.
  • Retained sutures after haemorrhoidectomy.
  • Injection of chemicals for treating pile masses.
  • Radiation burns from X-ray and Radiotherapy.