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Figure 5: Immunohistochemistry. (a) The tumor cells are positive for vimentin (stromal cells, black arrow). (b) The tumor cells are positive for CD68 (stromal cells, asterisk, and giant cells, arrowed). (c) The tumor cells are negative for smooth muscle actin. (d) S100 protein. (e) CD34. (f) For epithelial membrane antigen

Figure 5: Immunohistochemistry. (a) The tumor cells are positive for vimentin (stromal cells, black arrow). (b) The tumor cells are positive for CD68 (stromal cells, asterisk, and giant cells, arrowed). (c) The tumor cells are negative for smooth muscle actin. (d) S100 protein. (e) CD34. (f) For epithelial membrane antigen