Fig 1. A 34-year-old male patient with follicular variant-papillary thyroid cancer (FV-PTC) showed diffuse lung metastases and unusual metastases to the vastus lateralis muscle in the right thigh.

(A) ¹³¹Iodine whole body scan showed radioactive iodine avidity in the anterior neck and metastatic lesions in the neck, both lungs, and right thigh muscles. (B) Ultrasonography showed a round hypoechoic lesion in the muscle of the right thigh. (C) Fine-needle aspiration indicated muscle metastasis from FV-PTC.