%0 Journal Article %T Ultrasound-guided fine needle aspiration of retropharyngeal lymph nodes after radiotherapy for nasopharyngeal carcinoma: a novel technique for accurate diagnosis %A Chong Zhao %A Chuanbo Xie %A Guang-Yu Luo %A Guo-Liang Xu %A Hong-Bo Shan %A Jian-Jun Li %A Jian-Ming Gao %A Ke Pan %A Li-Zhi Liu %A Lin-Na Luo %A Long-Jun He %A Ming-Yuan Chen %A Ping Yang %A Wei-Jun Fan %A Xiao-Yan Gao %A Yin Li %J Archive of "Cancer Communications". %D 2018 %R 10.1186/s40880-018-0286-z %X The online version of this article (10.1186/s40880-018-0286-z) contains supplementary material, which is available to authorized users %K Fine needle aspiration %K Endoscopic ultrasonography %K Retropharyngeal lymph node %K Nasopharyngeal carcinoma %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5993149/