Gene expression of PAI-1 (Figure 4b) revealed that its level in the OM of 12.63 ± 3.07 is significantly higher than those identified in CO (1.13 ± 0.32), SC (0.29 ± 0.12) and TO (3.44 ± 1.58), p < 0.001, CI 95% 0.01–6.88. Here, SERPINE1 is linked to ocular melanoma.