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→Gliomatosis cerebri: update + refs
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==Gliomatosis cerebri== | ==Gliomatosis cerebri== | ||
* Extensively diffusely growing astrocytic neoplasm. | * Extensively diffusely growing astrocytic neoplasm. | ||
**Currently considered a pattern of diffuse glioma infiltration. | **Currently considered a rare pattern of diffuse glioma infiltration. | ||
* More than 3 lobes have to be involved, us. bilateral (radiology). | **Introduced in 1938 as a post-mortem diagnosis.<ref>SAMUEL NEVIN - GLIOMATOSIS CEREBRI, DOI: http://dx.doi.org/10.1093/brain/61.2.170 170-191 First published online: 1 June 1938</ref> | ||
* More than 3 lobes have to be involved, us. bilateral (radiology required). | |||
* biologic behaviour corresponds to WHO III (ICD-O: 9381/3) | * biologic behaviour corresponds to WHO III (ICD-O: 9381/3) | ||
* Based on presence / absence of a solid component authors propose two types:<ref>{{Cite journal | last1 = Seiz | first1 = M. | last2 = Tuettenberg | first2 = J. | last3 = Meyer | first3 = J. | last4 = Essig | first4 = M. | last5 = Schmieder | first5 = K. | last6 = Mawrin | first6 = C. | last7 = von Deimling | first7 = A. | last8 = Hartmann | first8 = C. | title = Detection of IDH1 mutations in gliomatosis cerebri, but only in tumors with additional solid component: evidence for molecular subtypes. | journal = Acta Neuropathol | volume = 120 | issue = 2 | pages = 261-7 | month = Aug | year = 2010 | doi = 10.1007/s00401-010-0701-2 | PMID = 20514489 }}</ref> | |||
** GC type 1: classic diffuse growth, without IDH1/2 mutation. | |||
** GC type 2: with a solid portion, mostly IDH1 mutant. | |||
* Genetic studies indicate strong overlap with diffuse astrocytic gliomas, oligodendrogliomas and glioblastoma. | |||
** It is likely that suggests that in the upcoming WHO classification gliomatosis is no longer a separate glioma entity.<ref>{{Cite journal | last1 = Herrlinger | first1 = U. | last2 = Jones | first2 = DT. | last3 = Glas | first3 = M. | last4 = Hattingen | first4 = E. | last5 = Gramatzki | first5 = D. | last6 = Stuplich | first6 = M. | last7 = Felsberg | first7 = J. | last8 = Bähr | first8 = O. | last9 = Gielen | first9 = GH. | title = Gliomatosis cerebri: no evidence for a separate brain tumor entity. | journal = Acta Neuropathol | volume = | issue = | pages = | month = Oct | year = 2015 | doi = 10.1007/s00401-015-1495-z | PMID = 26493382 }}</ref> | |||
==H3.3 K27M mutated glioma of the midline== | ==H3.3 K27M mutated glioma of the midline== | ||