Partially Cystic Thyroid Nodules on Ultrasound: Probability of Malignancy and Sonographic Differentiation

Abstract

About 5% of partially cystic nodules in our series were malignant. When more than 50% of the nodule is solid and the solid portion of the nodule is eccentric, the risk of malignancy is greater. As has been noted for completely solid nodules, microcalcifications are associated with an increased risk of malignancy.