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Figure 3: (a) Tumor cells show cytoplasmic and nuclear positivity for S-100 (IHC, ×40). (b) Tumor cells show cytoplasmic and nuclear positivity for S-100 and the osteoclastic giant cells are negative for the S-100 protein (IHC, ×400). (c) Tumor cells are negative for CD117 (IHC, ×100). (d) Tumor cells are negative for DOG1 (IHC, ×100). (e) Tumor cells show positivity for HMB45, (IHC, ×100). (f) Tumor cells are negative for melan A (IHC, ×100). (g) Tumor cells are negative for CK (IHC, ×100). (h) Tumor cells are negative for SMA (IHC, ×100). (i) Tumor cells are negative for CD34 (IHC, ×100). (j) Ki-67 index is 15% (IHC, ×400)

Figure 3: (a) Tumor cells show cytoplasmic and nuclear positivity for S-100 (IHC, ×40). (b) Tumor cells show cytoplasmic and nuclear positivity for S-100 and the osteoclastic giant cells are negative for the S-100 protein (IHC, ×400). (c) Tumor cells are negative for CD117 (IHC, ×100). (d) Tumor cells are negative for DOG1 (IHC, ×100). (e) Tumor cells show positivity for HMB45, (IHC, ×100). (f) Tumor cells are negative for melan A (IHC, ×100). (g) Tumor cells are negative for CK (IHC, ×100). (h) Tumor cells are negative for SMA (IHC, ×100). (i) Tumor cells are negative for CD34 (IHC, ×100). (j) Ki-67 index is 15% (IHC, ×400)