PCNA and neoplasm: In the correlation analysis we can see that FANCD2 is associated with tumor proliferation markers, including KI67 (R = 0.59, P < 0.001), PCNA (R = 0.53, P < 0.001), and cell cycle markers, incluidng CDK1 (R = 0.60, P < 0.001), CDK2 (R = 0.57, P < 0.001), CDK4 (R = 0.21, P < 0.001), CDK6 (R = 0.23, P < 0.001) (Fig. 11).