NBI and NBI Combined with Magnifying Colonoscopy.

Area of Science:

• Gastroenterology
• Endoscopic Imaging
• Colorectal Cancer Diagnosis

Background:

• Magnifying chromoendoscopy was a standard diagnostic tool for colorectal conditions.
• Narrow-band imaging (NBI) has emerged as a simpler, more convenient alternative since its development in 1999.
• NBI is increasingly replacing chromoendoscopy in clinical practice.

Purpose of the Study:

• To review the efficacy of magnifying chromoendoscopy and NBI-assisted colonoscopy.
• To evaluate their roles in detecting, histologically predicting, and estimating invasion depth of early colorectal cancer.
• To discuss future prospects and standardization of NBI diagnostic strategies.

Main Methods:

• Review of existing literature on magnifying chromoendoscopy and NBI colonoscopy.
• Focus on NBI's utility in histological prediction and depth estimation.
• Introduction of the NBI International Colorectal Endoscopic (NICE) classification.

Main Results:

• NBI with magnification is valuable for histological prediction and estimating invasion depth.
• Some studies indicate NBI is not superior to white light imaging for adenomatous polyp detection during screening.
• The NICE classification aims to standardize NBI diagnostic strategies.

Conclusions:

• NBI with magnification colonoscopy shows promise for improved diagnostic accuracy in early colorectal cancer.
• Prospective research is required to validate the NICE classification's reliability and feasibility.
• Future NBI applications may include real-time histological prediction, potentially reducing polypectomy risks and costs.