Analysis of the transcript levels of the costimulatory receptors OX40/TNFRSF4 (Figure 3(b)), ICOS (Figure 3), and GITR/TNFRSF18 (Figure 3(d)) indicated that ICOS and GITR transcripts were not highly expressed in any sarcoma subtype relative to other cancers in the TCGA dataset. Here, TNFRSF18 is linked to sarcoma.