<unk>  (also known as an anal/rectal<unk> , or perianal/perirectal<unk>  is an<unk>  adjacent to the anus. Most cases of perianal<unk> es are sporadic, though there are certain situations which elevate the risk for developing the disease, such as diabetes mellitus, Crohn's disease, chronic corticosteroid treatment and others. It arises as a complication of paraproctitis. Ischiorectal, inter- and intrasphincteric<unk> es have been described.
Anorectal abscess
Pilonidal disease
Perianal cellulitis
Anal fissure
Perianal hematoma
Anal fistula
Rectal prolapse
Anal cancer