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Uptodate Reference Title
Thyroid ultrasound: Nodule with a halo
Thyroid ultrasound: Nodule with a halo
(A) A hypoechoic nodule that is surrounded by a "halo." A halo indicates that there is an interface between the thyroid tissue and the nodule that is less echogenic than either the nodule or the gland. (B) Doppler imaging of a thin, regular halo demonstrates compressed blood vessels.