EWSR1 and Ewing sarcoma: In PLGC samples, the second and third most enriched motifs were Ets Variant Transcription Factor 2 (ETV2, P = 1 × 10-3093, 8.61%) and Ewing sarcoma (EWS, P = 1 × 10-2555, 8.01%) [Figure 2F].