Thyroglossal duct cyst
Mid line neck swelling - 2 yrs. No pain.
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A well-defined cystic lesion with internal echoes and debris is noted in mid line. Lower border of the lesion abutts hyoid bone. Lesion shows wall thickening and vascularity.
No perilesional hypervascularity is noted.
Location and ultrasound features favour thyroglossal duct cyst.