YAP1 and sarcomatoid carcinoma: Conversely, development of cSCC‐like tumors was observed in K14/YAP‐S127A and K5/NLS‐YAP‐5SA mice,100, 152 the latter displaying progression to spindle cell carcinoma at sites of scratch wounding where YAP‐mediated activation of the TF ZEB1 induced an EMT programme.152