Perianal abscess refers to a formed infective-inflammatory collection within the perianal region. It forms part of the broader group of ano-rectal abscesses.
They are often associated with perianal fistulae and are components of grades 2 and 4 fistulae under the classification system suggested the St James University. UK 2.
Infection and anal gland drainage obstruction from the perianal fistula may lead to an acute perianal abscess.
Recognised associations include
- diabetes mellitus
- Crohn disease
- pelvic infection
- anorectal cancer/anal cancer +/- radiation therapy
Treatment and prognosis
While some abscesses may resolve spontaneously via internal drainage into the anal canal, others may require surgical incision and drainage.
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- 3. Li X, Qiang JW, He C et-al. Magnetic resonance imaging study of perianal abscess. Zhonghua Wei Chang Wai Ke Za Zhi. 2013;14 (11): 868-70. Pubmed citation