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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.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
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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.
The innermost mucosa layer comprises simple columnar epithelium, lamina propria, and muscularis mucosae. This layer is primarily populated with absorptive cells, tasked with water absorption, and goblet cells, responsible for secreting mucus to...
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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.
Sigmoidoscopy
Sigmoidoscopy is a diagnostic procedure that uses a flexible sigmoidoscope equipped with a light source and camera to examine the rectum and sigmoid colon. The procedure involves inserting the tube through the anus...
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Related Experiment Video

Updated: Jul 24, 2025

Murine Endoscopy for In Vivo Multimodal Imaging of Carcinogenesis and Assessment of Intestinal Wound Healing and Inflammation
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MACROSCOPIC AND HISTOLOGICAL ANALYSIS ON ENDOSCOPICALLY RESECTED RECTAL LESIONS.

Marcos Onofre Frugis1, Carmen Australia Paredes Marcondes Ribas2, Osvaldo Malafaia2

  • 1Hospital 9 de Julho, Digestive Endoscopy Service - São Paulo (SP), Brazil.

Arquivos Brasileiros De Cirurgia Digestiva : ABCD = Brazilian Archives of Digestive Surgery
|July 5, 2023
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Summary

Rectal polyps are common and frequently adenomas with dysplasia, a precursor to colorectal cancer. Endoscopic resection is a safe and effective treatment for these rectal lesions.

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Area of Science:

  • Gastroenterology
  • Oncology
  • Endoscopic Surgery

Background:

  • Colorectal cancer (CRC) is a leading global malignancy.
  • Colonoscopy is crucial for CRC prevention, offering diagnostic and therapeutic capabilities for adenomatous lesions.

Purpose of the Study:

  • To analyze the prevalence and characteristics of rectal polypoid lesions.
  • To evaluate the safety and efficacy of endoscopic therapy for rectal lesions.

Main Methods:

  • Retrospective observational study.
  • Analysis of medical records of patients undergoing rectal polyp resection.
  • Endoscopic resection techniques including polypectomy and wide mucosectomy.

Main Results:

  • 123 patients evaluated; 37% had rectal polyps.
  • Adenomas with dysplasia (low and high-grade) were common findings.
  • Endoscopic resection achieved complete lesion removal in 91% of cases; 4% required surgery for infiltrative lesions.

Conclusions:

  • Rectal polyps are prevalent and often represent pre-cancerous lesions.
  • Endoscopic therapy is a safe and efficient treatment modality for rectal polyps.
  • Colonoscopy plays a vital role in the management of rectal lesions, preventing colorectal cancer progression.