2讨论 甲状腺未分化癌（Anaplastic Carcinoma of the Thyroid, ATC）占甲状腺原发恶性肿瘤的2%~5%，发病率约（1~2）/1000000[2]。
双语例句
1
This is a particularly virulent form ofthyroidcarcinoma. It occurs in the elderly and has a variable pathology, including spindle, squamous, and anaplastic cells.
本病为最恶性的甲状腺癌，见于老年人，病理各异，包括纺锤状、鳞状和未分化细胞。
2
Anaplasticthyroidcarcinoma is a very rare but aggressive form ofthe disease, affecting less than 5% of those diagnosed with thyroid cancer.