Fig. 18

Lingular thyroid in a 33-year-old male who presented with oropharyngeal bleeding. a Axial enhanced neck CT scan at the level of mandible demonstrates a 3 × 3 × 3.4 cm round, partly well-delineated, heterogeneously enhancing lesion (white arrow). It is predominantly on the left side of the oropharynx and to some extent at the mid part of the base of the tongue. Thyroid gland was normal (not shown). b Image of the anterior face and neck taken 20 minutes after Tc99m-Pertechnetate injection shows absent thyroid radiotracer uptake in normal thyroid anatomical location (black short arrows). There is an area of increased uptake (long black arrows) corresponding to posterior tongue mass identified on CT scan