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  Indian J Med Microbiol
 

Figure 2: Histopathological examination on H and E stain showing (a) malignant spindle cells resembling mesenchymal differentiation along with multinucleated giant cells (×10) and (b) osteoid formation on histopathology suggesting a bone tumor (×20), and immunohistochemical examination showing (c) immunonegative for cytokeratin (×20), (d) immunopositive for vimentin (×20)

Figure 2: Histopathological examination on H and E stain showing (a) malignant spindle cells resembling mesenchymal differentiation along with multinucleated giant cells (×10) and (b) osteoid formation on histopathology suggesting a bone tumor (×20), and immunohistochemical examination showing (c) immunonegative for cytokeratin (×20), (d) immunopositive for vimentin (×20)