page_title: Anorectal abscess
section_title: Diagnosis
hierarchical_section_title: Anorectal abscess / Diagnosis
caption_attribution_description: MRI of the male pelvis
context_page_description: Anorectal abscess is an abscess adjacent to the anus. Most cases of perianal abscesses 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 abscesses have been described.
context_section_description: Diagnosis of anorectal abscess begins with a medical history and physical exam. Imaging studies which can help determine the diagnosis in cases of a deep non-palpable perirectal abscess include pelvic CT scan, MRI or trans-rectal ultrasound. These studies are not necessary, though, in cases which the diagnosis can be made upon physical exam.
caption: MRI image of U-shaped fluid collection around the anus, showing perianal abscess formation.
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