But getting a sample of H. pylori is relatively difficult, as it requires a stomach biopsy.

但获得(H . pylori)的样品相对不易，它需要对胃部的活解剖。

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Methods: Collection of 36 cases by endoscopic biopsy or surgical pathology confirmed cases of stomach cancer. The spiral ct features of stomach cancer were analyzed retrospectively.

方法：收集36例经胃镜活检或手术病理证实的胃癌病例，分析螺旋CT表现。

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Currently doctors diagnose stomach cancer by taking a biopsy of the stomach lining using a probe and a flexible camera passed via mouth and down the gullet.

BBC: Stomach cancer 'spotted by breath test'