Neuro XI Flashcards
hemangioblastoma path description
closely arranged, thin-walled capillaries with minimal intervening parenchyma.
classic location of schwannoma
cerebellopontine angle
schwannoma management
Resection or stereotactic radiosurgery
Schwanzoma tumor marker
S-100
most common site of oligodendroglioma
frontal lobes
other findings in oligodendroglioma
1) “chicken-wire” capillary pattern
2) often calcified
pilocytic astrocytoma prognosis
benign; good prognosis
pilocytic astrocytoma location
Posterior fossa (cerebellum). May be supratentorial
characteristic path findings in pilocytic astrocytoma?
Rosenthal fibers
Rosenthal fibers description
Eosinophilic, corkscrew fibers.
gross finding of pilocytic astrocytoma
cystic + solid
medulloblastoma personality
1) highly malignant
2) form of primitive neuroectodermal tumor
medulloblastoma pathology
1) Homer-Wright rosettes
2) small blue cells
Most common site of ependymal cell tumors?
4th ventricle
ependymoma pathology
1) Characteristic perivascular rosettes
2) Rod-shaped blepharoplasts
blepharoplasts?
(basal ciliary bodies) found near nucleus
craniopharyngioma histology
1) calcification common
2) cholesterol crystals found in “motor oil” like fluid within tumor
pinealoma presentation in males
precocious puberty due to beta-hCG preoduction
pinealoma histology
similar to seminoma (late cells in lobules with watery cytoplasm and “fried egg” appearance)
Downward (transtentorial) central herniation
Caudal displacement of brain stem leads to rupture of paramedic basilar artery branches –> duret hemorrhages. Usually fatal.
cingulate herniation complication
con compress ACA
cingulate/subfaciline herniation
Innermost part of the frontal lobe is scraped under part of the fall cerebra.
duret hemorrhage
Small lineal areas of bleeding in the midbrain and upper pons of the brainstem caused by a traumatic downward displacement of the brainstem.
central herniation AKA
transtentorial herniation
