The Relationship between Locations of Initial and Metachronous Colorectal Lesions during Colonoscopy Surveillance after Polypectomy

Key Points

• This research examines how the locations of initial and metachronous colorectal lesions relate to one another during surveillance.
• Analyzed 570 surveillance patients post-polypectomy
• Classified colorectal locations into 6 areas
• Categorized lesions by risk factors such as adenomas and cancers
• 26.0% of metachronous lesions were in the same location as initial lesions
• 30.7% were in adjacent locations to initial lesions
• 43.3% were in distant locations from initial lesions
• Metachronous lesions are more likely to occur in the same or proximal areas as the initial lesions