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Figure 2d. US images of thyroid nodules of varying parenchymal composition (solid to cystic). (a) Sagittal image of solid nodule (arrowheads), which proved to be papillary carcinoma. (b) Sagittal image of predominantly solid nodule (arrowheads), which proved to be benign at cytologic examination. (c) Transverse image of mixed solid and cystic nodule (calipers), which proved to be benign at cytologic examination. (d) Sagittal image of predominantly cystic nodule (calipers), which proved to be benign at cytologic examination. (e) Sagittal image of cystic nodule (arrowheads). FNA of this presumed benign lesion was not performed because the nodule appears entirely cystic.
