CD4 and malignant peripheral nerve sheath tumor: The association between TILs and clinical outcome appeared to vary depending on the specific STS subtype—for example, higher levels of CD8+ T lymphocytes and CD4+ Treg cells were associated with better survival outcomes in UPS and DDLPS, whereas no association was seen in malignant peripheral nerve-sheath tumours (MPNST) between the outcome and any TIL-based characteristics.