Fig. 5
From: Thyroid computed tomography imaging: pictorial review of variable pathologies
A poorly differentiated invasive left thyroid mass in a 58-year-old female patient. a Sagittal greyscale neck ultrasound shows a large hypoechoic lesion with macro-calcification and micro-calcification. b Sagittal colour Doppler ultrasound shows left internal jugular vein filling defect with detected internal vascularity suggestive of tumour thrombus. c Enhanced axial and coronal CT scans of the neck show heterogeneously enhancing large lesion replacing the left thyroid lobe and extending to the isthmus and the medial aspect of the right thyroid lobe (white arrow). The mass and the conglomerate lymph nodes measure 12.5 × 7 × 5.8 cm (white arrows). d, e Axial enhanced CT scans show enlarged left cervical nodes (white arrow) and left internal jugular vein (IJV) thrombus (black arrows). Note the IJV distention and central enhancing portion in the upper cut (black arrow in e) concerning the tumour thrombus. f, g Enhanced axial CT scan of the upper chest demonstrate a mass extension into the retrosternal area, left tracheoesophageal groove, and posterior to the trachea (white arrows in f). There are multiple bilateral pulmonary nodules (white arrows in g)