PTPRC and neoplasm: In the soft tissue invasion area of the HSC-3-associated experimental group, the infiltration cell number of CD45-positive monocytes at the tumor invasion front showed a similar trend to that of the HSC-2-associated experimental group, the infiltration cell number of CD45-positive monocytes was the highest in the HSC-3 + GCTCs group, which was followed by the HSC-3-only and HSC-3 + PDLCs groups in both the soft tissue and bone tissue invasion areas—and there was a significant difference in each group (Figure 5C).