Lingual thyroid gland with multinodular goiter
Dysphagia, dyspnoea, hoarseness of voice.
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A well defined hyperdense lesion centred upon the base of the tongue with enhancement after contrast administration. It shows a few hypodense nodules. It is seen abutting the epiglottis. The mass encroaches upon the oropharyngeal airway which is relatively narrowed. It is seen surrounded by prominent small arteries and veins (seen within the epiglottis and ary-epiglottic folds).
No evidence of other thyroid tissue at the anatomical site of the thyroid gland.
Lingual thyroids represent 90% of ectopic thyroid glands. The majority of cases show absent thyroid tissue in the normal anatomical location.
It follows all imaging criteria of the normal thyroid gland and is susceptible to all known thyroid pathologies. However, about one-third of patients develop hypothyroidism.