Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
BMJ Case Rep. 2022 Jul 6;15(7):e251081. doi: 10.1136/bcr-2022-251081.
Papillary thyroid carcinoma (PTC) is the most common type of thyroid cancer, and regional neck metastasis is more common than distant metastasis. If present, metastasis most frequently occurs in lungs and bones. Follicular variant of papillary thyroid carcinoma (FVPTC) is a mixture of the classic and follicular thyroid carcinoma and metastasizes in the same fashion as the PTC with cervical lymph nodes as the most common site. A case of atypical presentation of FVPTC with rib metastasis is reported. We present a case of an old man with a left-sided palpable breast mass for 2 months in duration without breast pain. Initially, the breast mass was categorised as Breast Imaging Reporting and Data System (BI-RADS) 4a via ultrasonography. Subsequent immunohistochemistry demonstrated that the mass was metastatic thyroid cancer. Consequently, a CT scan revealed a tumour originating from the rib. The patient was finally diagnosed with metastatic FVPTC.
甲状腺乳头状癌（PTC）是最常见的甲状腺癌类型，区域颈部转移比远处转移更常见。如果存在转移，最常发生在肺部和骨骼。甲状腺滤泡细胞癌（FVPTC）是经典型和滤泡型甲状腺癌的混合体，其转移方式与 PTC 相同，以颈部淋巴结为最常见的转移部位。本文报告了一例 FVPTC 伴肋骨转移的不典型病例。我们报告了一例老年男性，2 个月来左侧可触及乳房肿块，无乳房疼痛。最初，超声检查将乳房肿块归类为乳腺影像报告和数据系统（BI-RADS）4a。随后的免疫组化显示肿块为转移性甲状腺癌。因此，CT 扫描显示肿瘤起源于肋骨。患者最终被诊断为转移性 FVPTC。
