1067例伴区域淋巴结转移鼻咽癌的MRI分析

目的：探讨鼻咽癌区域淋巴结转移的MRI特点,为临床分期、治疗及研究提供依据。方法：收集1067例伴区域淋巴结转移且经病理证实的首诊鼻咽癌患者的MRI资料,分析转移性淋巴结的分布情况以及与T分期的关系。结果：本组患者转移性淋巴结各区分布如下：Ib区20例（1.9%）,IIa区604例（56.6%）,IIb区883例（82.8%）,III区330例（30.9%）,Ⅳ区78例（7.3%）,Va区162例（15.2%）,Vb区49例（4.6%）,咽后967例（90.6%）,跳跃性转移仅9例（0.84%）。淋巴结转移与T分期之间无明确相关性。结论：鼻咽癌区域淋巴结转移以咽后和II区最常见,均为首站淋巴结;I区转移率极低;跳跃性转移罕见。区域淋巴结转移与T分期无关。

Analysis of magnetic resonance imaging of regional lymph node metastasis in 1067 cases of nasopharyngeal carcinoma

Objective：To explore the spread pattern of lymph node metastases in patients with nasopharyngeal carcinoma by using magnetic resonance imaging,which may provide a basis of clinical treatment and research.Methods：Total of 1067 histologically diagnosed nasopharyngeal carcinoma patients had routine MRI scan before therapy at the First Affiliated Hospital of Guangxi Medical University,to analyze the distribution of metastatic lymph nodes and the correlation between T stage and nodal metastasis.Results：The distribution was as follows：20 in level Ib,604 in level Ⅱa,883 in level Ⅱb,330 in level Ⅲ,78 in level IV,162 in level Va,49 in level Vb,967 in retropharynx.Leap metastasis rate was 0.84%.No significant correlation was found between T stage and nodal involvement.Conclusion：The retropharyngeal node and levelⅡwere the most frequently involved regions,they had similar metastatic rate and were both the first echo node to metastases of nasopharyngeal carcinoma.Level I metastasis was very low.The cervical node involvement of nasopharyngeal carcinoma was spread orderly down the neck,and the incidence of skip metastasis is rare.There is no significant relation between T stage and nodal involvement.