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Figure 7b. Papillary carcinoma and cystic lymph node metastasis in a 28-year-old woman. (a) Longitudinal sonogram of the right lobe of the thyroid shows an irregular hypoechoic tumor with microcalcifications. (b) Longitudinal sonogram of the right neck shows a cystic level 5 nodal metastasis with internal septation and foci of calcification (arrows). (c) Axial contrast-enhanced CT image shows the metastasis (arrow).