RT Journal T1 Giant cyst formation from lymph node metastasis in papillary thyroid cancer: a case study A1 WANG Jiashuo, GUO Xing, YAN Aihui PB Journal of Otolaryngology and Ophthalmology of Shandong University FD YR 2020 JF Journal of Otolaryngology and Ophthalmology of Shandong University JO Journal of Otolaryngology and Ophthalmology of Shandong University VO 34 IS 3 SP 111 DO 10.6040/j.issn.1673-3770.1.2020.020 K1 Thyroid cancer;Papillary carcinoma;Lymph node metastasis;Cystic changes;Cervical mass LK {http://ebhyxbwk.njournal.sdu.edu.cn/EN/article/article_2709.shtml}