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Illustrates a suspicious thyroid nodule. (a) Gray scale image of a malignant nodule with heterogeneous echogenicity and microcalcifications. (b) Color Doppler image of the same nodule demonstrates increased central blood flow. This nodule has a regular margin (0), is heterogeneous (1) with microcalcification (1), and has increased central blood flow (1). Index score is 3. Final diagnosis was papillary carcinoma.
