Radiology Lectures | Radquarters

Ultrasound of Thyroglossal Duct Cyst

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In this radiology lecture, we review the ultrasound appearance of thyroglossal duct cyst with two unique cases!

Key teaching points include:

  • Thyroglossal duct cyst is the most common congenital neck cyst.
  • Most present before age 18 as a midline, fluctuant neck mass near hyoid bone.
  • Often asymptomatic unless superinfected = Abscess, draining sinus.
  • Epithelial-lined cysts caused by failure of normal involution of thyroglossal duct.
  • Can occur anywhere from foramen cecum of tongue to thyroid gland.
  • Most are infrahyoid, followed by hyoid and suprahyoid.
  • Most are midline, but can be paramedian (more likely if infrahyoid).
  • If infrahyoid, typically embedded in strap muscles.
  • May move with swallowing and elevates with tongue protrusion.
  • Presence of normal thyroid gland should be confirmed.
  • When simple, typically appears as an anechoic midline neck mass near hyoid bone.
  • Cyst complexity usually due to superinfection: Proteinaceous internal debris and septations, thick irregular walls, increased blood flow and surrounding inflammation.
  • Solid components may indicate ectopic thyroid or rarely (less than 1% of cases) thyroid cancer (typically papillary subtype).
  • Tx: Resection of cyst, surrounding tissue along the thyroglossal tract, and midline portion of hyoid bone = Sistrunk procedure.

    • To learn more about the Samsung RS85 Prestige ultrasound system, please visit: https://www.bostonimaging.com/rs85-prestige-ultrasound-system-4

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    The post Ultrasound of Thyroglossal Duct Cyst appeared first on Radquarters.

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    Radiology Lectures | RadquartersBy Daniel J. Kowal, MD
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