A<unk>  is a collection of pus outside the anus. It arises from an infection at one of the anal crypts of Morgani which leads to inflamation and abscess formation. Most cases of<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 steroid treatment and others.
Perianal abscess
Anal fissure
Anal abscess
Anal fistula
Fecaloma
Anal dysplasia
Solitary rectal ulcer syndrome
Colonic abscess