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. 2020 Mar 5;6(3):e03450. doi: 10.1016/j.heliyon.2020.e03450

Figure 2.

Figure 2

eTSH F-18 FDG PET/CT demonstrated an additional lymph node not evidenced by sTSH exam. A 60-year-old female was diagnosed 18 years ago with an aggressive DTC subtype. She had multiple radioiodine doses (cumulative dose = 25.9GBq = 700mCi) and signs of radioiodine refractory thyroid cancer (rising sTg levels = 16.7 ng/ml). The sTSH F-18 FDG PET/CT trans axial A) PET B) CT and C) Fused images show marked uptake in a right cervical lymph node level IIb (SUV = 5.3). The eTSH F-18 FDG PET/CT trans axial D) PET E) CT and F) Fused images demonstrated higher uptake (SUV = 6.5) in the same lymph node and an additional adjacent lymph node (SUV = 4.8) not evidenced on the sTSH F-18 FDG PET/CT. Histopathology confirmed both metastases.