Paediatric Radiology


Case  15 :  
Pediatric Radiology
An 8-year-old male presents with a cystic midline swelling that moves superiorly on deglutition.
USG was requested. What is the diagnosis?
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Imaging Findings

Examination reveals a bilobed echogenic lesion in the midline. No cystic elements were noted within. Thyroid gland was not seen at its normal position. CT confirms the diagnosis of ectopic thyroid.

Diagnosis

Ectopic thyroid

Discussion

The incidence of ectopic thyroid in the diagnosis of thyroglossal duct cysts has been reported to be as high as 1% to 2%. The actual incidence of solitary ectopic thyroid tissue is substantially lower. Nevertheless, to prevent the inadvertent removal of the only functioning thyroid tissue, with resultant postoperative hypothyroidism and possible medicolegal consequences, the routine preoperative identification of normal thyroid gland is advocated. Ultrasound is an accurate, cost-effective, non-invasive imaging modality in the preoperative evaluation of all patients with neck masses suspicious for thyroglossal duct cysts.

Dr. Alan Andrade, Mumbai