Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
etiology for supratentorial hemispheric parenchymal bleed
|
ruptured aneurysm
vascular malformation cortical/dural venous thrombosis amyloid |
|
|
pathophys of amyloid angiopathy
|
amyloid deposits in media and intima of small arteries and arterioles or cortex/meninges
there is fibrinoid degeneration and microaneurysmal dilatation --> ruptured BV |
|
|
pathologically how is amyloid angiopathy dx'd
|
stains red with congo red, wiht apple green birefringence under polarized light
|
|
|
describe pathogenesis of hemorrhagic transformation of infarct
|
altered BBB predisposes and then either pt had lysis, developed collateral flow, or there was correction of hypotension --> bleed
|
|
|
appearance of hemorrhagic transformation of infarct
|
cortical gray matter is almost always involved, +/- white matter involvement
|
|
|
appearance of WM if it is involved in a hemorrhagic transformation of infarct
|
WM is hypodense to nml WM on CT and is hetero in appearance (this + bleed being in a vascular distribution helps to distinguish it from lobar hemorrhage)
|
|
|
pathogenesis of dolichoectasia and fusiform aneurysm
|
they develop from ATH affecting media (as opposed to nml ATH dz, which affects the intima).
damage to the media --> arterial stretching, elongation extending over a long segment |
|
|
do fusiform aneurysms rupture
|
rarely, but they do cause sx 2/2 mass effect --> hemiparesis, impaired eye mov't or other cranial neuoropathy
|
|
|
definition of a giant intracranial aneurysm
|
>25mm
|
|
|
BV most comonly involved in giant intracranial aneurysm
|
40-60% inovlve th ecavernous internal carotid artery
|
|
|
complications assoc with giant intracranial aneurysm
|
high risk o fhemorrhage, cerebral compression and thromboembolic events
|
|
|
classic appearance of partially thrombosed giant intracranial aneurysm
|
target appearance on CECT
|
|
|
appearance of giant intracranial aneurysm when not thrombosed
|
hyperdense on NECT and have marked enhancement
|
|
|
appearance of giant intracranial aneurysm on MR
|
variable
|
