| − | Infection of the anal sac to form an abscess and it may follow from [[Anal Sac Impaction - WikiClinical|anal sac impaction]]. Fistulous tracts may arise from the abscess and rupture to the skin. | + | Infection of the anal sac to form an abscess and it may follow from [[Anal Sac Impaction|anal sac impaction]]. Fistulous tracts may arise from the abscess and rupture to the skin. |