Related Experiment Video
Updated: Aug 4, 2026
06:33
Establishment of Human Epithelial Enteroids and Colonoids from Whole Tissue and Biopsy
Published on: March 6, 2015
Epithelial polyps of the large bowel: a pathological and colonoscopic study
Current Problems in Cancer
|December 1, 1979
Summary
This study on large bowel polyps found a trend for follow-up polyps to appear near the splenic flexure. No link was identified between polyp type and carcinoma development.
Area of Science:
- Gastroenterology
- Colorectal Surgery
- Oncology
Background:
- Epithelial polyps and colorectal carcinoma are significant health concerns.
- Colonoscopic surveillance is crucial for managing large bowel polyps.
- Understanding polyp distribution and characteristics aids in early detection and prevention.
Purpose of the Study:
- To analyze the distribution and characteristics of epithelial polyps in the large bowel.
- To investigate trends in polyp location and size during follow-up colonoscopies.
- To explore potential relationships between polyp histology and the presence of colorectal carcinoma.
Main Methods:
- Study included ninety patients with large bowel polyps or carcinoma undergoing at least two colonoscopies.
- Patients were categorized into three groups based on polyp findings (single, multiple, or carcinoma).
- Polyp type and colon distribution were analyzed, with a focus on follow-up examinations.
Main Results:
- A trend suggested follow-up polyps were more frequently located proximal to the splenic flexure.
- Subsequent polyps in the multiple-polyp group were smaller than initial ones.
- No correlation was found between epithelial polyp histology and the development of carcinoma.
Conclusions:
- Follow-up colonoscopies may reveal a tendency for new polyps to form in the proximal colon.
- Polyp size may decrease or remain stable in patients with multiple polyps over time.
- Histological type of epithelial polyps does not appear to predict the presence of colorectal carcinoma.
Related Concept Videos
01:27Histology of the Small Intestine
The small intestine exhibits a unique histological structure that significantly enhances its function in digestion and nutrient absorption. These structures include circular folds, villi, and various specialized cells that collectively facilitate the digestion of food.
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...
01:26Histology of the Large Intestine
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...
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...
01:25Assessment of the Rectum and Anus
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,...
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
01:26Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy
This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...
01:25Endoscopic Procedures II: Colonoscopy
The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
01:27Diverticular Disease of the Colon
Diverticular disease involves the formation of diverticula—small sac-like outpouchings of the colonic wall—and their complications. It most commonly affects the sigmoid colon due to higher intraluminal pressure and structural vulnerability. It results from structural weakness and increased pressure in the colon, producing pseudodiverticula that may remain silent or progress to inflammation and serious complications.Structure of DiverticulaIn diverticulosis, these outpouchings are...