BARD1 and yolk sac tumor: All analyzed GCTs expressed BARD1 FL, with statistically significant differences between the BARD1 FL expression in the tumour (0.005 ± 0.004) and adjacent tissue (0.008 ± 0.0042) in the yolk sac tumour (YCT) (Z = 2.19; p = 0.024).