Immunohistochemical analysis showed tumor cells expressing vimentin (Figure 3B), CD68 (Figure 3C), CD99 (Figure 3D), and CD10 focally, while negative for SMA, CD34, S100, melan-A, CD57, CD56, p53, LCA, CD117, DOG1, AE1/AE3, and Ki-67, with a proliferative index of approximately 30%. This evidence concerns the gene TP53 and neoplasm.