Fig. 2

A 70-year-old female patient with neck tumor for more than 4 months (A) Transverse image of ultrasonography, showing a heterogeneous hypoechoic nodule with circumscribed margin on the right lobe of thyroid. The arrows show the internal linear echogenic strands; (B) Longitudinal image of ultrasonography. The arrow shows a significant posterior echo enhancement; (C) Blood flow spectrum, showing rich blood flow signals; (D) Non-contrast CT. The arrow shows the CT of the right lobe of thyroid; (E) Venous phase CT, showing homogeneous mild enhancement in the right lobe nodule and the density of it is lower than that of the thyroid parenchyma; (F) Pathological results, showing mucosa- associated lymphoid tissue lymphoma (MALT) (*400)