Fig. 1F-18 FDG PET CT. The F-18 FDG PET CT shows focal uptake in left lobe of thyroid gland, both cervical lymph nodes, mediastinal lymph node and both supraclavicular lymph nodes
Fig. 2Ultrasound finding. Thyroid ultrasound shows hypoechoic nodule of 1.03×0.25 cm in left lobe of thyroid gland (arrow).
Fig. 3Neck CT. Computed tomography scan shows enlarged supraclaviclar lymph nodes (arrow).
Fig. 4Microscopic finding of left lobe of thyroid gland. (A) In scanning view of the tumor, mass is confined to thyroid gland. (B) Low-power view of the tumor shows nest pattern of tumor cells and separated by firbrovascular stroma (H&E stain, ×100). (C) High-power view of the tumor shows polygonal or spindle shape of tumor cells (H&E stain, ×400). (D) Synaptophysin stain was positive.
Table 1Laboratory results of tumor markers and calcitonin