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Tumours with moderate/high pigmentation are associated with a worse survival than tumours with no/low pigmentation. (Kaplan–Meier curves and log rank test). (a): UM-related survival according to the level of tumour pigmentation (p = 0.016); (b): UM-related survival according to the level of MITF mRNA expression (p = 0.30 with two MITF groups, separated according to the median expression level).
