Fig. 3From: Evaluating thyroid nodules: predicting and selecting malignant nodules for fine-needle aspiration (FNA) cytologyUltrasound of the thyroid gland showing a benign colloid nodule which has typical ultrasound features of a non-neoplastic nodule. This nodule has a well-defined contour, an isoechoic/hyperechoic echo texture and demonstrates peripheral flow on colour DopplerBack to article page