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。
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Anaplasticthyroidcarcinoma is a very rare but aggressive form of the disease, affecting less than 5% of those diagnosed with thyroid cancer.