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Related Concept Videos

Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
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Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

Endoscopic Procedures I: Esophagogastroduodenoscopy

127
An Esophagogastroduodenoscopy (EGD) is a diagnostic procedure in which an endoscopist uses a flexible, lighted endoscope to visualize the upper gastrointestinal (GI) tract. The procedure includes visualizing the oropharynx, esophagus, stomach, and the first part of the small intestine, the duodenum.
During an EGD, the endoscope can be used to:
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Ultrasonography01:17

Ultrasonography

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
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Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

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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:
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Endoscopic Studies I: Bronchoscopy and Thoracoscopy01:30

Endoscopic Studies I: Bronchoscopy and Thoracoscopy

210
Endoscopy is a non-surgical medical technique used to examine a person's internal organs and vessels. This lesson will focus on two types of endoscopic studies: bronchoscopy and thoracoscopy.
Bronchoscopy
Description
Bronchoscopy is a procedure that involves direct visualization of the larynx, trachea, and bronchi for diagnostic and therapeutic purposes. A flexible fiber optic or rigid bronchoscope is used to carry out the procedure. The fiber-optic bronchoscope is more frequently used due...
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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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...
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Related Experiment Video

Updated: Jul 11, 2025

Author Spotlight: Demonstrating Systematic Endobronchial Ultrasound to New Endoscopists
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Endoscopic Ultrasound in Cancer Staging.

Harry R Aslanian1, Thiruvengadam Muniraj1, Anil Nagar1

  • 1Department of Medicine, Section Digestive Diseases, Yale University School of Medicine, New Haven, CT, USA.

Gastrointestinal Endoscopy Clinics of North America
|November 16, 2023
PubMed
Summary
This summary is machine-generated.

Endoscopic ultrasound (EUS) aids in staging gastrointestinal cancers by accurately assessing local tumors. Combining EUS with imaging and fine-needle aspiration (FNA) improves diagnosis and reduces healthcare costs.

Keywords:
Cancer stagingCholangiocarcinomaColorectal cancerEndoscopic ultrasoundEsophageal adenocarcinomaGastric cancerPancreatic adenocarcinoma

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Area of Science:

  • Gastroenterology
  • Oncology
  • Medical Imaging

Background:

  • Accurate cancer staging is crucial for effective treatment planning in gastrointestinal (GI) malignancies.
  • Traditional imaging modalities have limitations in precisely evaluating the extent of locoregional tumor spread.

Purpose of the Study:

  • To review the utility of endoscopic ultrasound (EUS) in the staging of GI cancers.
  • To evaluate the role of EUS-guided fine-needle aspiration (FNA) in improving diagnostic accuracy.

Main Methods:

  • Review of existing literature on EUS for GI cancer staging.
  • Analysis of EUS performance compared to cross-sectional imaging for locoregional staging.
  • Assessment of the impact of EUS-guided FNA on diagnostic yield.

Main Results:

  • EUS excels in locoregional tumor staging compared to cross-sectional imaging.
  • EUS sensitivity is limited in detecting distant metastases.
  • Fine-needle aspiration (FNA) significantly enhances diagnostic accuracy and provides tissue diagnosis.

Conclusions:

  • EUS is a valuable tool for locoregional staging of GI cancers.
  • Combining EUS with cross-sectional imaging ensures comprehensive staging.
  • Accurate staging via EUS reduces unnecessary procedures and healthcare expenditures.