A member asked:

What does hypo mean on thyroid ultrasound?

5 doctors weighed in across 2 answers

Hypoechoic: Hypo in ultrasound refers to hypoechoic -- meaning low density. The signicance varies by the rest of the description of the ultrasound.

Answered 5/10/2021

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Fewer echoes on US: Hypoechoic describes the appearance of a nodule on ultrasound (us). It refers to a nodule that reflects back fewer sound waves compared to the normal thyroid tissue around it. While most thyroid cancers are hypoechoic, most hypoechoic nodules are not cancers. But a hypoechoic nodule may have a slightly higher risk of being a cancer than other nodules.

Answered 12/31/2022

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