All that correlated with a decreased level of CDKN2A mRNA expression.1,18 However, Chaubert et al. 18 have not detected any CDKN2A mutations and observed LOH of the CDKN2A gene in only one of 29 TGCTs with a yolk sac tumor component, using seven different markers. Here, CDKN2A is linked to yolk sac tumor.