甲状腺腺瘤亦常显示冷节结，由于肿瘤产生囊性变或出血所致。
Adenomas of thyroid frequently appeared as cold nodules due to the cystic change or intratumoral bleeding.
横轴位图像上观察甲状腺病灶的形态有无钙化、出血、壁结节、淋巴结转移及增强后病灶强化程度。
Results:On the axial images, calcification, hemorrhage, wall nodule, metastatic lymphadenopathy and tumor reinforcement levels after enhancement were observed in thyroid tumors.
结论：本文首次报道ACDF后甲状腺上动脉迟发性出血。
Conclusion. This is the first report that shows late hemorrhage due to superior thyroid artery dissection after ACDF.
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