Thyroid Metastasis From Hepatocellular Carcinoma Visualized by 18F-FDG PET/CT Imaging

Thyroid metastasis from hepatocellular carcinoma (HCC) is very rare. We present a case of a 41-year-old man with a markedly elevated serum α-fetoprotein (2,297 ng/mL) and a left neck mass 6 months after a hepatolobectomy for a primary HCC. 18F-FDG PET/CT imaging showed a focal uptake in the left thyroid lobe corresponding to a mass. The patient underwent a left hemithyroidectomy. Subsequent pathology confirmed HCC metastasis to the thyroid.

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