CCNE1 and sarcoma: Pathological analysis of the tumors showed a similar histology between Ccne1+ and Vgll3+ genetics, consistent with High Grade Undifferentiated Sarcoma with Spindle Cell morphology, which recapitulates the histological features of human Undifferentiated Pleiomorphic Sarcoma (UPS)32 (Supplementary Fig. 1f).