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Gleneagles Medical Centre, 6 Napier Road, Suite #03-13, Singapore 258499
Anal Fistula (Fistual-in-ano)

An anal fistula is a small channel that develops between the anal canal and the skin near the anus due to recurrent infection of a gland in the anal canal.


  • Recurrent infection of the anal canal
  • Ongoing pain or swelling
  • Drainage of pus and fluid from the abscess


Infection of a gland in the anal canal that results in an abscess. When the abscess bursts, pus that drains from it forms a tract that eventually becomes an anal fistula after recurrent infections.


Fistulotomy: Surgery that involves making an incision in the fistula tract to open it up and then allowing the tissue to heal and merge.

  • Insertion of seton
  • Fistula plug
  • Ligation of Inter-sphincteric Fistula Tract (LIFT)
colorectal surgery
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