Fig. 6

A 5-year-old boy with worsening stridor, dry cough and cervical lymphadenopathy with papillary thyroid carcinoma. a Axial CT of the neck (lung windows) demonstrates marked narrowing of the trachea, with slit-like appearance (arrow). b On the mediastinal windows, the thyroid gland is bulky and demonstrates patchy heterogenous enhancement. c Transverse ultrasound image of the thyroid gland prior to biopsy reveals multiple internal foci of calcification and (d) colour Doppler imaging reveals a hyper vascular thyroid gland