Thyroid Cystic Nodules May Have Ultrasonographic Features Mimicking Malignancy during Interval Changes

Ultrasonography (US) features of thyroid nodules can be helpful in identifying those most at risk for malignancy; these include marked hypoechogenicity, microcalcifications, irregular margins, and a taller-than-wide shape (nonparallel orientation). Some cystic change morphologically after simple aspiration percutaneous ethanol injection treatment. They show hypoechogenicity margins on the US difficult to distinguish from papillary carcinoma. This article covered imaging precautions when malignant nodule is suspected during clinical course cyst.