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Related Concept Videos

Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

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Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
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Begin by inspecting the perianal and anal areas for color, texture, rashes,...
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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
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The large intestine is divided into three main regions: the cecum, colon, and rectum. Extending from the ileocecal valve to the anus, it frames the small intestine on three sides.
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Inflammatory Bowel Disease V: Surgical Management01:21

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Surgical interventions for inflammatory bowel disease (IBD), which includes ulcerative colitis and Crohn's disease, are essential in managing symptoms and addressing complications. The selection of surgical procedures is contingent upon the specific conditions and complications that stem from these illnesses.
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Histology of the Large Intestine01:26

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The large intestine, a vital component of the gastrointestinal tract, is structured with four main layers: the mucosa, submucosa, muscularis, and serosa. Each layer performs a distinct role in facilitating the smooth functioning of the large intestine.
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Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
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Related Experiment Video

Updated: Apr 12, 2026

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Pedunculated colonic lipoma prolapsing through the anus.

Omar M Ghanem1, Julia Slater1, Puneet Singh1

  • 1Omar M Ghanem, Julia Slater, Richard F Heitmiller, Joseph D DiRocco, Department of Surgery, Medstar Union Memorial Hospital, Baltimore, MD 21218, United States.

World Journal of Clinical Cases
|May 19, 2015
PubMed
Summary

Colorectal lipomas are usually asymptomatic benign tumors. This case highlights a rare presentation of a large, incarcerated lipoma causing trans-anal protrusion, mimicking rectal prolapse.

Keywords:
Colorectal lipomaRectal prolapseTrans-anal resection

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Area of Science:

  • Gastroenterology
  • Colorectal Surgery

Background:

  • Colorectal lipomas are common benign tumors, typically asymptomatic and found incidentally.
  • Symptoms like pain or bleeding usually occur with lipomas larger than 2 cm.

Observation:

  • A 61-year-old male presented with a large, irreducible 6.7 cm trans-anal mass initially suspected as rectal prolapse.
  • Digital rectal exam differentiated the mass from the anal canal, revealing a pedunculated lesion.

Findings:

  • Pathology confirmed a large, polypoid submucosal lipoma of the colon with ulceration and necrosis.
  • The lipoma presented unusually as an incarcerated, trans-anal mass.

Implications:

  • This case underscores the rare possibility of large lipomas presenting as incarcerated trans-anal masses.
  • Trans-anal resection proved to be a simple and effective treatment for this presentation.