Question

Narrow band imaging (NBI): simplified classification for gastric lesions.

Hint:

NBI is an excellent tool for early detection of gastric cancer and for differentiating between benign and malignant lesions.

Answer 1

Narrow Band Imaging (NBI) is an advanced endoscopic imaging technique that uses specific light wavelengths to enhance the visualization of surface mucosal patterns and microvessels in the gastric mucosa. It is particularly useful for the detection of early gastric cancer, precancerous lesions, and other gastric abnormalities.
Step 1: NBI Technique:
NBI uses two specific wavelengths of light (415 nm and 540 nm) that enhance the visibility of blood vessels and mucosal structures, providing high contrast for detecting subtle abnormalities in the gastric lining.
Step 2: Simplified Classification for Gastric Lesions:
1. Type I: Normal or benign lesions with regular, well-demarcated mucosal patterns. 2. Type II: Lesions showing mild irregularity in mucosal patterns, possibly indicative of inflammation or early cancer. 3. Type III: Irregular mucosal patterns with poor vascular structures, commonly associated with gastric cancer.