In the ARAT cohort, presence of SPOP mutation compared to wild-type was associated with more favorable TTCRPC (not reached (NR) vs. 16.7 months, adjusted HR (aHR) 0.20; 95% CI 0.06-0.63; p=0.006) and OS (NR vs. 27.2 months, aHR 0.19; 95% CI 0.05-0.79; p=0.022).