Thyroid colloid cysts do not grow over 4 year ultrasound follow up.
3700 colloid cyst patients were followed for 4 years. 115/3700 or 3% showed a 5 mm increase or more. 60/3700 no change, gradual change 37/3700, gradual decrease 6/3700 disappearance 2/3700.During 4 year study none of 3700 complained of symptoms. Korean study confirmed no significant increases >5 mm in most of 36,800/3700 patients in study.
Ultrasound image of Image colloid cyst with comet tail artifacts.
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