Fig. 2From: Evaluating thyroid nodules: predicting and selecting malignant nodules for fine-needle aspiration (FNA) cytologyUltrasound images of the thyroid gland showing (a) markedly hypoechoic nodule (between callipers) with ill-defined irregular contour and (b) mixed flow pattern with central flow on colour Doppler. Surgical excision and histology revealed a papillary thyroid carcinomaBack to article page