braintumors

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Author:
Anonymous
ID:
16619
Filename:
braintumors
Updated:
2010-04-28 12:38:04
Tags:
brain tumors USMLE Step1 jsc
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Description:
Primary brain tumors for USMLE Step 1
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  1. concentrically arranged whorled patterns
    menigioma
  2. psammoma bodies
    meningioma
  3. second most common primary brain tumor
    meningioma
  4. arises from arachnoid cells external to brain
    meningioma
  5. "pseudopalisading" pleomorphic tumor cells with central areas of necrosis
    glioblastoma
  6. cerebellopontine angle
    schwannoma
  7. S-100 positive
    schwannoma
  8. bilaterally schwannoma found in…
    neurofibromatosis type 2
  9. fried egg -- round nuclei with clear cytoplasm
    oligodendroglioma
  10. chicken-wire capillary pattern
    oligodendroglioma
  11. rathke's pouch
    pituitary adenoma, craniopharyngioma
  12. bitemporal hemianopia
    pituitary adenoma
  13. adult tumors in order of incidence
    GBM, meningioma, schwannoma, oligodendroglioma, pituitary adenoma
  14. rosenthal fibers -- eosinophilic corkscrew fibers
    pilocytic astrocytoma
  15. cystic and solid
    pilocytic astrocytoma
  16. rosettes or pervascular pseudorosette pattern of cells
    medulloblastoma
  17. solid (gross), small blue cells (hits)
    medulloblastoma
  18. PNET
    medulloblastoma
  19. can compress 4th ventricle, causing hydrocephalus
    medulloblastoma
  20. perivascular pseudorosettes with rod-shaped blephharoplasts near nucleus
    ependymoma
  21. found in 4th ventricle, cause hydrocephalus
    ependymoma
  22. associated with von Hippel-Lindau when found with retinal angioma
    hemangioblastoma
  23. produce EPO --> secondary to polycythemia
    hemangioblastoma
  24. foamy cells, highly vascular
    hemangioblastoma
  25. calcification is common
    craniopharyngioma
  26. most common supratentorial tumor
    craniopharyngioma
  27. childhood tumors in order of incidence
    pilocytic astrocytoma, medulloblastoma, ependymoma, hemangioblastoma, craniopharygioma

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