滤泡性甲状腺癌是继乳头状甲状腺癌之后第二常见的甲状腺癌类型。下颌骨和颌面部区域的转移很少见。我们的研究对象是一名 55 岁的患者，他因滤泡性甲状腺癌接受了甲状腺全切除术，并随后接受了放射性碘治疗。诊断十六年后，甲状腺球蛋白水平升高表明疾病复发。使用先进的成像技术——氟18氟脱氧葡萄糖正电子发射断层扫描/计算机断层扫描、骨闪烁扫描和治疗后I-131扫描——发现了一个意想不到的转移部位：左下颌骨髁。活检证实存在转移性滤泡性甲状腺癌。版权所有：© 2024 印度核医学杂志。

Follicular thyroid cancer is the second-most common type of thyroid cancer after papillary thyroid cancer. Metastases to the mandible and maxillofacial region are rare. Our study presents a 55-year-old patient who underwent total thyroidectomy for follicular thyroid cancer and subsequent radioactive iodine therapy. Sixteen years after diagnosis, elevated thyroglobulin levels suggested disease recurrence. Using advanced imaging techniques - Fluorine-18 fluorodeoxyglucose positron emission tomography/computed tomography scan, bone scintigraphy, and posttreatment I-131 scan-an unexpected metastatic site was identified: the left mandibular condyle. A biopsy confirmed the presence of metastatic follicular thyroid cancer.Copyright: © 2024 Indian Journal of Nuclear Medicine.