Statistical analysis showed that histology and preoperative size of the tumor (cm2) showed significant relation to molecular groups (p =  < 0.001 and 0.03, respectively), where all SHH-activated and TP53-wild-type groups were associated with DNMB histology (100%), and the non-WNT/non-SHH group was associated with classic histology in 94.4% of cases. This evidence concerns the gene TP53 and neoplasm.