方法：对4 3例经手术、颈部淋巴结活检和临床治疗证实纵隔淋巴结肿大作了影像学分析。

Methods:The imaging materials of 43 patients of mediastinal lymphadenectasis proved by operation, cervical lymph node biopsy and clinical treatment were analyzed.

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前哨淋巴结活检对全组病例颈部淋巴结转移状况评价的准确率为96.8%，灵敏度为92.3%。

The accuracy of the sentinel lymph node biopsy in this study was 96.8%, the sensitivity was 92.3%.

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结论鼻咽癌颈部淋巴结转移切取活检可增加其远处转移率，降低生存率。

Conclusion Cervical incisional biopsy increases distant metastatic rate and decreased survival rate for NPC.

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