Thyroid Ultrasound > Sonographic Features > Echogenicity


Most thyroid carcinomas are hypoechoic relative to surrounding thyroid parenchyma, 78% to 86%. Hypoechogenicity is a sensitive sign but is nonspecific: 30.6% to 55% of benign nodules are also hypoechoic. An echogenic appearance is commonly associated with follicular neoplasms, both benign and malignant, but can also be seen in papillary cancers.

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