Blue Laser Imaging with a Small-Caliber Endoscope Facilitates Detection of Early Gastric Cancer
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초록
Conventional endoscopy often misses early gastric cancers with minimal red discoloration because they cannot be distinguished frominflamed mucosa. We treated a patient with a small early gastric cancer that was diffcult to diagnose using conventional endoscopy. Conventional endoscopy using a small-caliber endoscope showed only subtle red discoloration of the gastric mucosa. However, bluelaser imaging showed a clearly discolored area measuring 10 mm in diameter around the red lesion, which was distinct from thesurrounding inflamed mucosa. Irregular vessels on the tumor surface (suspicious for early gastric cancer) were observed even withsmall-caliber endoscopy. Biopsy revealed a well-moderately differentiated tubular adenocarcinoma, and endoscopic submucosaldissection was performed. Histopathological examination of the specimen confirmed well-moderately differentiated adenocarcinomalocalized to the mucosa with slight depression compared to the surrounding mucosa, consistent with the endoscopic findings. Thissmall early gastric cancer became clearly visible with blue laser imaging using small-caliber endoscopy.
Abstract
Conventional endoscopy often misses early gastric cancers with minimal red discoloration because they cannot be distinguished frominflamed mucosa. We treated a patient with a small early gastric cancer that was diffcult to diagnose using conventional endoscopy. Conventional endoscopy using a small-caliber endoscope showed only subtle red discoloration of the gastric mucosa. However, bluelaser imaging showed a clearly discolored area measuring 10 mm in diameter around the red lesion, which was distinct from thesurrounding inflamed mucosa. Irregular vessels on the tumor surface (suspicious for early gastric cancer) were observed even withsmall-caliber endoscopy. Biopsy revealed a well-moderately differentiated tubular adenocarcinoma, and endoscopic submucosaldissection was performed. Histopathological examination of the specimen confirmed well-moderately differentiated adenocarcinomalocalized to the mucosa with slight depression compared to the surrounding mucosa, consistent with the endoscopic findings. Thissmall early gastric cancer became clearly visible with blue laser imaging using small-caliber endoscopy.
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