Imaging of acute anorectal conditions with CT and MRI

Preethi Guniganti, Sara Lewis, Ally Rosen, Sarah Connolly, Constantine Raptis, Vincent Mellnick

Research output: Contribution to journalReview articlepeer-review

4 Scopus citations

Abstract

Anorectal disorders are a common cause of presentation to the emergency department (ED). While the most frequently encountered anorectal conditions, such as hemorrhoids and anal fissures, are relatively benign and do not require imaging for diagnosis or management, there are multiple potentially life threatening anorectal conditions for which imaging is an important component of evaluation, diagnosis, and management. Although computed tomography (CT) is the most commonly used imaging modality for evaluation of anorectal pathology in the ED, magnetic resonance imaging (MRI) has an increasingly important role in the detection, characterization and management of specific anorectal conditions. This pictorial essay will review the imaging anatomy of the anorectum, summarize imaging protocols, and discuss the clinical presentation, imaging appearance, and differential diagnosis of anorectal conditions that may present to the emergency department, including infectious, inflammatory, malignant and vascular conditions.

Original languageEnglish
Pages (from-to)403-422
Number of pages20
JournalAbdominal Radiology
Volume42
Issue number2
DOIs
StatePublished - Feb 1 2017

Keywords

  • Anorectal
  • Emergency
  • Fistula
  • Perianal
  • Proctitis

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