BASICS AND TIPS OF EUS TECHNIQUES AND READING FOR ESOPHAGEAL AND GASTRIC CANCERS

Abstract

As a gastrointestinal endoscopic modality, EUS enables the layer-by-layer visualization of the gastrointestinal wall, providing critical diagnostic data that are otherwise not obtainable through white-light or magnifying endoscopy. EUS is commonly employed in clinical practice, particularly in the staging of esophageal and gastric cancers, including the assessment of tumor invasion depth and lymph node metastasis.

However, since EUS is time-consuming and requires technical resources compared to conventional white-light endoscopy, careful selection of lesions for EUS is essential. This selection should be based on preliminary findings from white-light or magnifying endoscopy. Additionally, producing clear and reproducible EUS images that can be objectively interpreted is crucial for accurate diagnosis and appropriate treatment planning.