SHH and medulloblastoma: In the case of the GSE37418 dataset, n = 73 pediatric medulloblastoma samples were analyzed, representing four expression classes, WNT-activated, SHH-activated, Group 3 and Group 4 medulloblastoma (WNT n = 8, SHH n = 10, G3 n = 16, G4 n = 39).