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Imaging of the medullary thyroid carcinoma with metastasis to lymph node. Medullary thyroid carcinoma of the right thyroid lobe (red arrows) visualized on axial computed tomography (CT) (a) and transverse ultrasound (US) scan (b). A large metastatic lymph node (orange arrows) is demonstrated on axial CT of the neck (c) and sagittal US (d).
