Medulloblastoma is the most common embryonal CNS tumor of childhood and is likely composed of biologically different subsets of tumors arising from stem and/or progenitor cells of the cerebellum. Recently, four distinct molecular subgroups of medulloblastoma have been identified [WNT (wingless), SHH (sonic hedgehog), Group 3, and Group 4]. Nearly all (90 %) of WNT patients have somatic missense mutations in CTNNB1 which promote protein stabilization. Alterations in SHH subgroup most often fall within the Shh signalling pathway. The most common are somatic or germline inactivating alterations or loss of PTCH1 and SUFU, or somatic missense mutations activating SMO. Group 3 tumors are characterized by MYC amplification resulting in high MYC mRNA expression levels compared with SHH and Group 4 tumors.The most frequently mutated somatic gene in Group 4 medulloblastoma is KDM6A, a histone H3 Lys27 (H3K27) demethylase.
Category
Cancer
Brite
Human diseases in ICD-11 classification [BR:br08403]
02 Neoplasms
Neoplasms of brain or central nervous system
2A00 Primary neoplasms of brain
H01667 Medulloblastoma
Pathway-based classification of diseases [BR:br08402]
Cellular process
nt06549 Cadherin signaling
H01667 Medulloblastoma
Cancer-associated carbohydrates [br08441.html]
H01667
Waszak SM, Robinson GW, Gudenas BL, Smith KS, Forget A, Kojic M, Garcia-Lopez J, Hadley J, Hamilton KV, Indersie E, Buchhalter I, Kerssemakers J, Jager N, Sharma T, Rausch T, Kool M, Sturm D, Jones DTW, Vasilyeva A, Tatevossian RG, Neale G, Lombard B, Loew D, Nakitandwe J, Rusch M, Bowers DC, Bendel A, Partap S, Chintagumpala M, Crawford J, Gottardo NG, Smith A, Dufour C, Rutkowski S, Eggen T, Wesenberg F, Kjaerheim K, Feychting M, Lannering B, Schuz J, Johansen C, Andersen TV, Roosli M, Kuehni CE, Grotzer M, Remke M, Puget S, Pajtler KW, Milde T, Witt O, Ryzhova M, Korshunov A, Orr BA, Ellison DW, Brugieres L, Lichter P, Nichols KE, Gajjar A, Wainwright BJ, Ayrault O, Korbel JO, Northcott PA, Pfister SM
Title
Germline Elongator mutations in Sonic Hedgehog medulloblastoma.
Begemann M, Waszak SM, Robinson GW, Jager N, Sharma T, Knopp C, Kraft F, Moser O, Mynarek M, Guerrini-Rousseau L, Brugieres L, Varlet P, Pietsch T, Bowers DC, Chintagumpala M, Sahm F, Korbel JO, Rutkowski S, Eggermann T, Gajjar A, Northcott P, Elbracht M, Pfister SM, Kontny U, Kurth I
Title
Germline GPR161 Mutations Predispose to Pediatric Medulloblastoma.
