Examination showed a 2cm firm nodule in the left lower neck. Thyroid ultrasound revealed a large nodule in the left upper lobe of thyroid. Lab work showed TSH of 1.55mIU/L (0.27-4.2 mIU/L) and serum calcitonin level of 1903 pg/ml (0.0-5.1 pg/mL). FNA biopsy of the nodule showed ...