Introduction: We describe here the first reported case of a follicular adenoma arising from a thyroglossal duct remnant within the hyoid bone in Singapore.Clinical Picture: A 32-year-old woman presented with an asymptomatic lump in the anterior midline of her neck of three months’ duration. CT scan showed an expansile lesion localised to the medulla of the body of the hyoid. Treatment: A well-defined intrahyoidal mass was found at surgery. Histology revealed a follicular adenoma arising from maldescended thyroid tissue within the hyoid bone. Outcome: Recovery was uneventful. Conclusion: It is important to consider thyroglossal duct carcinomas as a differential diagnosis when evaluating anterior neck lumps.
Thyroglossal duct remnant is one of the most common lesions of the anterior midline neck. It occurs in 7% of adults1 and carcinoma is found in less than 1%. The majorities are papillary and mixed papillary-follicular carcinomas, with follicular and squamous cell carcinomas occurring far less frequently.
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