本组FND范围多仅包括I、II区的淋巴结［5］，随访显示舌癌、口底癌、下龈癌和颊癌术后可出现复发，又以颊癌的复发率较高（23.1%)，且与T、N分期无显著相关，而RND仅有3例(1.9%)出现术后复发，故应慎重选择FND。参考文献：
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