Upper endoscopy can detect early cancer and can distinguish between cancerous and non-cancerous conditions by performing biopsies of suspicious areas.

胃镜检查还可以发现早期癌症，并且可以通过对可疑部位的活组织检查区分癌和非癌性病变。

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Objective To explore the diagnostic and therapeutic value of early endoscopy in upper gastrointestinal hemorrhage.

目的探讨急诊内镜在上消化道出血诊断与治疗中的应用价值。

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Methods Statistical analysis was performed among 344 cases of upper gastrointestinal tumor diagnosed by Endoscopy, and confirmed by pathology.

方法对胃镜诊断且病理证实的344例上消化道肿瘤病例，进行统计分析。

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More than seventy per cent of physicians in high-cost cities referred the patient to a gastroenterologist, ordered an upper endoscopy, or both, while half as many in low-cost cities did.

NEWYORKER: The Cost Conundrum