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随着纤维胃镜检查技术的发展，对早期胃癌及其他胃粘膜病变的诊断正确率已有明显提高。但对胃的微小恶性病变或胃粘膜的肠腺化生、间变，单靠胃镜诊断有困难，即使在直视下活检，往往因不能准
With the development of fiberoptic gastroscopy, the diagnostic accuracy of early gastric cancer and other gastric mucosal lesions has been significantly improved. However, it is difficult to diagnose gastric microscopic lesions or intestinal metaplasia or interstitial changes of the gastric mucosa by gastroscopy alone. Even biopsy under direct vision may result in inaccurate diagnosis.