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33 Cards in this Set

  • Front
  • Back
what are the types of CNS tumors?
neuroepithelial
meninges
cranial and spinal never
meatopoeitic
germ cell
cyst and tumor like
tumor of the sellar gregion
local enxtions from regional tumor
metastatic
what CNS tumors are most common
Neuroeptithelial
menignes
cranial nerve
metastatic
what is the most common primary CNS tumor
neuroeptithelial
what are the origens of neuroeptithelial
astrocytoma, GBM, pilycystic astrocytoma
what is the most common tumor of menignes?
meningioma
tumors of cranial and spinal
swchanoma
pituitary ademo
crainiopharyngioma
sellar region tumors
main sources of metastatic tumors
lung
kidney
GI
melanoma
breast

lung and breast most common
treat well with radiation metatastic
small cell lung
germ cell tumorss
lymphomas
leukemia
multiple meylomas
melanoma
choricarcinoma
renal cell carcinoma are what type?
bloody
hemosomthing metastatic
what is main ddx for tumor in the sella
pituitary tumor
craniopharyngioma
what is the most comomon tumor in Cerebellar pontine angle
schwannoma
meningioma
tumor in pineal region usual is what
germ cell
pineal paranchymal
treatment options for CNS tumor
biopsy
resection
chemo
radiation
relieve symptoms
how do u differentiate between frontal and parietal?
find central fissure pointing toward "mustache" anything in front is frontal anything behind is paraietal
on MRI what color is water in T1? T2?
T1 water dark

T2 water bright
local mass effect?
means that the mass is changing brain anatomy (like shifting hemisphere, or compressing lateral cystern)
what does hypodensity on non contrast MRI usually mean?
edema
hypodensity appearse how in which images?
darker on CT
Darker on T1 MRI
lighter on T2 MRI
how do you tell difference btw CT and MRI
CT-bone,metal,calcification, blood are all bright, fat dark
MRI-bone not shown, fat is bright
what is MRI DWI good for?
shows light areas in areas of underperfusion
when do surgury?
only on solitary tumors in places that can be reached without destroying to much tissue,
gerstmanns syndrome cause?
classic dominant(left in most) parietal lobe disease due to a lesion
what is presenation of gerstmanns syndrome?
arphaia without alexia
acalcula
right left confusion
finger agnosia
what is the purpose of contrast in MRI or CT?
contrast means that what every lights up is not the same type of tissue as the rest of the area.
what is a solid enchancing lesion vs nonenhancing lesion?
enhancing lesion means that the tissue is new/different from the surrounding tissue.

so solid enhancing would be a relatively new tumor or a tumor that was of a different tissue type

whereas a nonenchancing lesion might be a hyperplasia or an old tumor with no recent growth. or a cyst without tumor
what is the common cause of a ring enchancing lesion?
the dark core of the lesion is usually flluid, purulence, or necrosis, surrounded by so sort of tumor
glioblastoma high grade prognosis?
3 month survival no treatment
11 months survival if really aggressively treated
what lesions are associated with less neuro deficits noticed, and little edema seen around lesion?
slow growing
pulse artifact ?
line accross entire MRI picture

seen in large aneurysm
what are the masses that can cause obstuctive hydrocephalus?
tumors of the sella and near the pineal
what is parinauds syndrome?
masses pressing directily on quadrigeminal plate such as pineal region tumors, or pulsating artifact aneurysm of ACA

causes elevated ICP secondary to compression of mesencephalic tectum by dilated suprapineal recess and hydrocephalus
what are the clinical signs of parinauds syndrome?********
cant look up-upgaze palsy
pupilary dilation-mydriasis
lid retraction
nystagmus retreactorius
dissocited near-light reponse(react to objects that are close but does not react to light.)