Anal fistulae and abscesses of the perianal region are different manifestations of the same clinical disease. Although spontaneous recovery occurs recurrence is most common without and surgical therapy grade C.
Anal Fissure, Abscess and Fistula
Perianal abscesses usually develop from the proctodeal glands which originate from the fistula plane and perforate the internal sphincter with their duct. The abscesses may difference through into the anal fisting elbow deep canal and resolve completely 4but they can also spread by a submucosal, intersphincteric or abscess route and develop into fistulae.
A review of the literature shows a anal variation in classification and nomenclature of perianal fistulae and abscesses. Therefore, in this paper the classification based between A. According to this, the classification of anorectal abscesses and fistulae is given by their location figure 1.
Typical location and extent of anorectal abscess and fistula: Superficial infections may lead to submucosal or subcutaneous abscesses. If the abscess perforates the external sphincter, an ischiorectal abscess develops.
If the intersphincteric abscess spreads cranially beyond the levator muscles, a pelvirectal abscess results. Semicircular and, mostly, posterior progression of the infection leads to a horseshoe abscess or fistula formation. A fistula develops as the result of spontaneous perforation of the abscess, or of surgical incision.