Third, the thyroid primordium may not have been able to detach from the pharyngeal floor and migrate, promoting a lingual thyroid
with a complete structural and functional differentiation as observed in patients 3, 4, 5, and 6.
Caron, "Lingual thyroid
and hyperthyroidism: a new case and review of the literature," Journal of Endocrinological Investigation, vol.
Our patient's thyroid-stimulating hormone was significantly elevated at 9.8 mcIU/mL (normal, 0.34-5.60 mcIU/mL) and technetium scanning showed that the lingual thyroid
was her only functioning thyroid tissue.
Ultrasonic assessment of the lingual thyroid
gland in children.
Hong, "Case ofthyroid hemiagenesis and ectopic lingual thyroid
presenting as goitre," Journal of Laryngology & Otology, vol.
No uptake was seen in the normal region of the neck indicating lingual thyroid
is the only functioning thyroid tissue in the body.
A lingual thyroid
is the most common form of thyroid ectopia, representing 90% of all cases.
The differential diagnosis of lingual schwannoma, benign lesions like granular cell tumors, salivary gland tumors, leiomyomas, rhabdomyomas, lymphangiomas, haemangiomas, dermoid cysts, lipomas, inflammatory lesions and lingual thyroid
and malignant lesions like squamous cell carcinoma, sarcomas.
A lingual thyroid
is a mass of ectopic thyroid tissue located in the midline of the base of the tongue.
The most common ectopic location is lingual thyroid
(about 90% of all cases) with a prevalence between 1:1,00,000 and 1:3,00,000 and a clinical incidence between 1:4,000 to 1:10,0003.
However, several other entities may be considered in the differential diagnosis: irritation fibroma, mucocele, granular cell tumor, tertiary syphilis, lingual thyroid
(usually further posterior) and, in rare cases, squamous cell carcinoma.
in a young infant presenting as airway obstruction: report of a case.