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==Overview==
==Overview==
==Pathogenesis==
==Pathogenesis==
* Medulloblastoma arises from  embryonal cells, which are stem cells that are normally involved in development of the fourth ventricle.  
* Medulloblastoma arises from  embryonal cells, which are stem cells that are normally involved in development of the fourth ventricle.<ref>Medulloblastoma. Wikipedia (2015)https://en.wikipedia.org/wiki/Medulloblastoma#Pathogenesis Accessed on November,10 2015</ref>
==Genetics==
==Genetics==
* Development of medulloblastoma is the result of multiple genetic mutations.  
* Development of medulloblastoma is the result of multiple genetic mutations.  
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:*TBR1  
:*TBR1  




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==Gross Pathology==
==Gross Pathology==
==Micropathology==
==Micropathology==
* On microscopic histopathological analysis, characteristic findings of medulloblastoma include:<ref>Medulloblastoma. Libre Pathology (2015) http://librepathology.org/wiki/index.php/Medulloblastoma Accessed on November,10 2015 </ref>
:* Small round cell tumor
:* Homer-Wright rosettes
* On immunohistochemestry analysis, characteristic findings of medulloblastoma include:<ref>Medulloblastoma. Libre Pathology (2015) http://librepathology.org/wiki/index.php/Medulloblastoma Accessed on November,10 2015 </ref>
:* MAP2 +ve
:* Synaptophysin +ve
:* NSE +ve/-ve
:* NF +ve/-ve
:* Chromogranin +ve/-ve
:* GFAP +ve/-ve
:* Vimentin +ve
:* Nestin +ve
:* INI1 retained


==References==
==References==
{{Reflist|2}}
{{Reflist|2}}



Revision as of 15:36, 10 November 2015

Medulloblastoma Microchapters

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Haytham Allaham, M.D. [2]

Overview

Pathogenesis

  • Medulloblastoma arises from embryonal cells, which are stem cells that are normally involved in development of the fourth ventricle.[1]

Genetics

  • Development of medulloblastoma is the result of multiple genetic mutations.
  • Genes involved in the pathogenesis of medulloblastoma include:
  • CTNNB1
  • PTCH1
  • MLL2
  • SMARCA4
  • DDX3X
  • CTDNEP
  • KDM6A
  • TBR1


Associated Conditions

Gross Pathology

Micropathology

  • On microscopic histopathological analysis, characteristic findings of medulloblastoma include:[2]
  • Small round cell tumor
  • Homer-Wright rosettes
  • On immunohistochemestry analysis, characteristic findings of medulloblastoma include:[3]
  • MAP2 +ve
  • Synaptophysin +ve
  • NSE +ve/-ve
  • NF +ve/-ve
  • Chromogranin +ve/-ve
  • GFAP +ve/-ve
  • Vimentin +ve
  • Nestin +ve
  • INI1 retained

References

  1. Medulloblastoma. Wikipedia (2015)https://en.wikipedia.org/wiki/Medulloblastoma#Pathogenesis Accessed on November,10 2015
  2. Medulloblastoma. Libre Pathology (2015) http://librepathology.org/wiki/index.php/Medulloblastoma Accessed on November,10 2015
  3. Medulloblastoma. Libre Pathology (2015) http://librepathology.org/wiki/index.php/Medulloblastoma Accessed on November,10 2015


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