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- A thyroglossal duct cyst is a fluid-filled sac in the neck at the midline and attached to the base of the tongue.
- The cyst may be located between the hyoid bone (the bone in the base of the tongue) and the breastbone (65%), between the hyoid bone and the lower jaw (20%), or at the hyoid bone.
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- A freely movable cystic mass present at birth and located in the midline of the neck.
- It elevate with tongue protrusion or swallowing.
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- It is caused by incomplete closure of the thyroglossal duct, which is a narrow canal that connects the thyroid gland to tongue.
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- Neck ultrasound shows a cystic space.
- A CT scan of the neck shows a low-density mass with a thin peripheral rim.
- Surgical excision of the lesion and pathologic evaluation to confirm
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- Infection of cyst
- Risk of malignancy
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