Conclusions
In conclusion, here we reported a case of anaplastic transformation in
metastatic cervical lymph nodes of PTC. Despite being recieved with
postoperative radiation therapy, neck skin metastasis and multiple lung
metastasis appeared, and the disease rapidly worsened, resulting in an
unfortunate outcome. It is important to be aware that papillary thyroid
carcinoma could develop anaplastic transformation at metastatic cervical
lymph nodes.