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Related Concept Videos

Appendicitis01:19

Appendicitis

Appendicitis is an acute inflammatory condition of the vermiform appendix, most commonly caused by obstruction of its lumen. The appendix is a narrow, blind-ended pouch that extends from the cecum, making it particularly prone to obstruction. Causes include fecaliths, lymphoid hyperplasia (often after viral infections), parasites, tumors, or foreign bodies. This obstruction initiates a cascade of pathological changes.Luminal Obstruction and Early InflammationAfter obstruction, normal mucosal...
Histology of the Gastrointestinal (GI) Tract01:20

Histology of the Gastrointestinal (GI) Tract

The GI tract, from beginning to end, is made up of four continuous tissue layers that adjust their structure according to their specific roles. These layers, from innermost to outermost, are known as the mucosa, submucosa, muscularis, and serosa, which are continuous with the mesentery.
The mucosa is sometimes called a mucous membrane due to its mucus-secreting features. This membrane is composed of epithelium, which directly interacts with ingested substances, and the lamina propria, a layer...
Histology of the Large Intestine01:26

Histology 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...
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging 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...

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Related Experiment Videos

Hypervascular subepithelial gastrointestinal masses: CT-pathologic correlation.

Nam Kyung Lee1, Suk Kim, Gwang Ha Kim

  • 1Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine and Medical Research Institute, Pusan National University, 1-10 Ami-Dong, Seo-Gu, Busan 602-739, Republic of Korea.

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|November 9, 2010
PubMed
Summary

Computed tomography (CT) aids in identifying hypervascular subepithelial gastrointestinal (GI) masses. Advanced CT techniques improve the characterization of these lesions, distinguishing their origin and extent for better diagnosis.

Related Experiment Videos

Area of Science:

  • Gastroenterology
  • Radiology
  • Oncology

Background:

  • Gastrointestinal (GI) masses are predominantly epithelial neoplasms.
  • Subepithelial masses, covered by normal mucosa, originate from intramural or extramural processes.
  • Hypervascular subepithelial masses are more conspicuous on contrast-enhanced computed tomography (CT).

Purpose of the Study:

  • To review the characteristic CT appearances of hypervascular subepithelial masses in the GI tract.
  • To highlight the utility of CT in differentiating the origin and extent of GI subepithelial lesions.

Main Methods:

  • Review of contrast material-enhanced CT findings for various hypervascular subepithelial lesions.
  • Discussion of the role of multidetector CT with multiplanar reformation in lesion characterization.
  • Comparison of CT capabilities with endoscopic ultrasonography for subepithelial mass evaluation.

Main Results:

  • Intramural hypervascular lesions include neuroendocrine tumors, GI stromal tumors, and hemangiomas.
  • Extramural hypervascular lesions encompass Castleman disease and solitary fibrous tumors.
  • Advanced CT enables determination of epithelial, intramural subepithelial, or extramural subepithelial origin and assessment of tumor extent and invasion.

Conclusions:

  • Familiarity with CT appearances of hypervascular subepithelial masses aids radiologist diagnosis.
  • Multidetector CT with multiplanar reformation enhances the ability to delineate lesion origin and extent.
  • CT plays a crucial role in the comprehensive evaluation of subepithelial GI masses.