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Average size thyroid gland with diffusely heterogeneous parenchymal echotexture; right thyroid lobe measures 1.2 x 1.4 x 4.0 cm and left lobe measures 1.3 x 1.5 x 4.3 cm. Isthmus measures 2.4 mm. Mildly increased vascularity is seen in both thyroid lobes on the Doppler ultrasound examination. A small well-defined hyperechoic nodule measuring 6 x 7 mm is seen in the left thyroid lobe. No other obvious focal solid or cystic nodule is appreciable in either thyroid lobe.