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Figures
- Fig 1.
An 86-year-old man with an incidentally detected midline mass on US. Transverse (A) and longitudinal (B) sonograms show a uniformly anechoic thyroglossal duct cyst with few internal septa (arrowheads) and thin walls (white arrows). On follow-up US studies (C and D) at 2.5 years, the TGDC decreased by 4 mm. There were no interval changes in US features.
- Fig 2.
A 59-year-old man with an incidentally detected midline mass on US. Transverse (A) and longitudinal (B) sonograms demonstrate a uniformly anechoic thyroglossal duct cyst without a perceptible wall. On follow-up US (C and D) at 6 years, the TGDC remained the same size, while there were interval changes in US features. White arrows indicate the thin walls of the TGDC.
- Fig 3.
A 54-year-old man with an incidentally detected midline mass on US. Transverse (A) and longitudinal (B) sonograms depict a truly anechoic thyroglossal duct cyst with posterior enhancement (white arrows). On follow-up US (C and D) at a 1 year, the TGDC shows a gradual increase of 5 mm and a pseudosolid appearance. He underwent a Sistrunk operation due to neck discomfort. Preoperative CT images (E and F) demonstrate a uniformly hypoechoic cystic mass at the hyoid bone level. The TGDC was confirmed by pathologic examination of the surgical specimen, which showed no inflammation or hemorrhage.
Tables
Interval changes on follow-up US examinationsa
Decreased Group (n = 25) Stable Group (n = 133) Increased Group (n = 14) P Value Follow-up intervals (mo) 18.2 ± 10.6b 25.2 ± 13.3b 29.9 ± 14.1 .009 Maximal diameter on initial US (mm) 10.8 ± 5.8c 8.3 ± 3.2c 9.3 ± 4.2 .042 US feature changes of 8 (32%) 20 (15%) 3 (21.4%) .12 Internal echogenicity 0 5 3 Wall thickness 2 8 1 .27 Presence of posterior enhancement 4 9 1 Internal septa 2 2 0 Solid component 0 0 0
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