SHH and medulloblastoma: Aberrant activation of Shh signaling pathway has been implicated in several cancers such as pancreatic cancer, prostate, glioblastoma, squamous cell carcinoma, basal cell carcinoma, medulloblastoma, prostate cancer, colon cancer, rhabdomyosarcoma and breast cancer31, 36, 37, 38, 39, 40.