case_images: PMC7345608_01
case_images: Thyroid nodule FNAB, Diff-Quick stain with marked cellularity of atypical spindle cells, dyscohesive, and in tissue aggregates with some binucleated cells.
case_images: CRIE2020-8889843.001.jpg
case_images: PMC7345608_01_CRIE2020-8889843.001.jpg
case_images: fig1
case_images: The Diff-Quick stain showed marked cellularity of atypical spindle cells, dyscohesive, and in tissue aggregates with some binucleated cells (Figure 1).
case_images: Postsurgical histology hematoxylin-eosin staining showed a spindle cell tumor with frequent mitotic figures.
case_images: CRIE2020-8889843.002.jpg
case_images: PMC7345608_01_CRIE2020-8889843.002.jpg
case_images: fig2
case_images: After total thyroidectomy was performed, hematoxylin-eosin staining showed a spindle cell tumor with frequent mitotic figures (Figure 2).
case_images: Immunohistochemical stains for (a) cytokeratin AE1/AE3 and (b) thyroglobulin showing entrapped thyroid follicles within fascicles of spindle tumor cells positive for (c) smooth muscle actin (SMA) and (d) desmin.
case_images: CRIE2020-8889843.003.jpg
case_images: PMC7345608_01_CRIE2020-8889843.003.jpg
case_images: fig3
case_images: The tumor cells stained positive for smooth muscle actin (SMA) and desmin (Figure 3) and negative for cytokeratin and thyroglobulin.