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33 Cards in this Set
- Front
- Back
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what are the types of CNS tumors?
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neuroepithelial
meninges cranial and spinal never meatopoeitic germ cell cyst and tumor like tumor of the sellar gregion local enxtions from regional tumor metastatic |
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what CNS tumors are most common
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Neuroeptithelial
menignes cranial nerve metastatic |
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what is the most common primary CNS tumor
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neuroeptithelial
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what are the origens of neuroeptithelial
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astrocytoma, GBM, pilycystic astrocytoma
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what is the most common tumor of menignes?
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meningioma
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tumors of cranial and spinal
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swchanoma
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pituitary ademo
crainiopharyngioma |
sellar region tumors
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main sources of metastatic tumors
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lung
kidney GI melanoma breast lung and breast most common |
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treat well with radiation metatastic
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small cell lung
germ cell tumorss lymphomas leukemia multiple meylomas |
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melanoma
choricarcinoma renal cell carcinoma are what type? |
bloody
hemosomthing metastatic |
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what is main ddx for tumor in the sella
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pituitary tumor
craniopharyngioma |
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what is the most comomon tumor in Cerebellar pontine angle
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schwannoma
meningioma |
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tumor in pineal region usual is what
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germ cell
pineal paranchymal |
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treatment options for CNS tumor
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biopsy
resection chemo radiation relieve symptoms |
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how do u differentiate between frontal and parietal?
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find central fissure pointing toward "mustache" anything in front is frontal anything behind is paraietal
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on MRI what color is water in T1? T2?
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T1 water dark
T2 water bright |
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local mass effect?
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means that the mass is changing brain anatomy (like shifting hemisphere, or compressing lateral cystern)
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what does hypodensity on non contrast MRI usually mean?
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edema
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hypodensity appearse how in which images?
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darker on CT
Darker on T1 MRI lighter on T2 MRI |
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how do you tell difference btw CT and MRI
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CT-bone,metal,calcification, blood are all bright, fat dark
MRI-bone not shown, fat is bright |
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what is MRI DWI good for?
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shows light areas in areas of underperfusion
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when do surgury?
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only on solitary tumors in places that can be reached without destroying to much tissue,
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gerstmanns syndrome cause?
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classic dominant(left in most) parietal lobe disease due to a lesion
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what is presenation of gerstmanns syndrome?
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arphaia without alexia
acalcula right left confusion finger agnosia |
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what is the purpose of contrast in MRI or CT?
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contrast means that what every lights up is not the same type of tissue as the rest of the area.
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what is a solid enchancing lesion vs nonenhancing lesion?
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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 |
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what is the common cause of a ring enchancing lesion?
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the dark core of the lesion is usually flluid, purulence, or necrosis, surrounded by so sort of tumor
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glioblastoma high grade prognosis?
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3 month survival no treatment
11 months survival if really aggressively treated |
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what lesions are associated with less neuro deficits noticed, and little edema seen around lesion?
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slow growing
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pulse artifact ?
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line accross entire MRI picture
seen in large aneurysm |
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what are the masses that can cause obstuctive hydrocephalus?
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tumors of the sella and near the pineal
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what is parinauds syndrome?
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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 |
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what are the clinical signs of parinauds syndrome?********
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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.) |
