All patients suffering cancer of these two groups underwent systemic mediastinal and hilar lymph node sampling.

比较两组手术时间、术后住院时间、术后留置引流管时间、清扫的淋巴结总数等指标。

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Intraoperatively, a growing body of evidence suggests that lymph node dissection can be performed safely, and should replace sampling as a more effective means of identifying unsuspected N2 disease.

许多证据提示术中淋巴结清扫术可以安全的进行，而且应该替代采样淋巴结切除成为确诊可疑性N2期肿瘤更有效的方法。

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