Anal Fistula
(Fistula-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.

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

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.

Treatments of Anal Fistula

Fistulotomy: Colorectal 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)
Anorectal Abscess
Dr Ng Kheng Hong
Dr Ng Kheng Hong
Senior Consultant Colorectal & General Surgeon
MBBS (Singapore), MMed (Surgery), FRCS (Edinburgh),
FAMS (General Surgery)
Dr Ng Kheng Hong has over 20 years of experience treating anal fistulas, including conservative methods and surgery. A former Director of Minimally Invasive Surgery at the Department of Colorectal Surgery at SGH and former Visiting Consultant in Surgical Oncology at the National Cancer Centre, Dr Ng is deeply committed to his work. Dr Ng is also well-published in medical journals and continues to teach medical students to this day.
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