Rapid intraluminal growth of a colorectal cancer observed by endoscopy

摘要

Colorectal cancer growth is considered relatively slow; studies using barium enema images of overlooked cancers to estimate intraluminal doubling times have suggested an average of 6 months, but those doubling times are quite variable, even for well-differentiated and moderately differentiated tumors. Similar studies are not available from the United States for endoscopy because identified tumors are either resected endoscopically or referred for surgery. By contrast, Japanese endoscopists have described and photographed the conversion of precancerous to cancerous lesions.