Rapidly Growing Vascular Mass Within the Thyroid

A woman with multinodular goiter was referred for exertional dyspnea and chest discomfort; CT revealed significant growth in a small time interval, and PET/CT was showed increased metabolic activity in the mass. What is your diagnosis?

from #ORL via xlomafota13 on Inoreader http://ift.tt/1KIptbC
via IFTTT