KLK3 and ocular melanoma: The cumulative 10-year incidence of BCR, MTS, CSM and OM was significantly lower in men with undetectable PSA compared to men with PSA persistence: 50.3% vs. 98% (p < 0.0001), 12.8% vs. 49% (p < 0.0001), 7% vs. 31.9% (p < 0.0001) and 21.2% vs. 43.6% (p = 0.0001), respectively (Figure 5).