Neuroradiology Flashcards
MR Spectroscopy findings in TB
Elevated lipids
Face of giant panda on MRI. What is the disorder?
What part is involved
Wilson’s disease
Hepatolenticulostriate degeneration
Calcification seen on Brain MRI. What neoplasms could it be
Craniopharngioma Astrocytoma Choroid plexus Oligodendroglioma Medulloblastoma Ependymoma
Iron deposition in Globus pallidus is seen in ____.
What is MRI appearance called?
Hallevorden Spatz Disease
Eye of tiger appearance
Ring enhancement on MRI is seen in?
Tuberculoma Toxoplasmosis Neurocysticercosis Metastatsis Brain Abscess
Open ring sign on MRI is seen in?
MS
Drop metastasis is seen in
Medulloblastoma
Primary CNS Lymphoma
Tumors showing CSF spread are
Germinoma GBM Ependymoma Medulloblastoma CNS lymphoma
What part of brain is affected in huntington’s
Caudate nucleus
CMV involves what part of brain?
Periventricular
Where are lesions of metastatsis usually found in brain
Grey-white matter interface
What are Dawson’s fingers ? When are they seen?
Area of lesion around subependymal veins (perivenular).
Seen in MS
Spongiform lesion on gross specimen in brain correspond to which radiological sign?
Which disease are they linked with?
Cortical ribbon sign on MRI
Cortex and basal ganglia (deep grey matter) involved
Creutzfelt disease by prions is the cause
Bilateral optic nerve involvement is seen in which demyelinating disorder?
ADEM
vs unilateral in MS
Rice grain calcification is seen in ___
Cysticercosis
What areas are seen bright in DW-MRI?
Why?
Brain infarct
Brain Abscess
Due to less/no brownian movement
Post-infection demyelinating disorder?
What infections is it linked with?
What else do you know about it?
ADEM
Measles, varicella, etc.
Widely scattered small foci of inflammation and demyelination.
Enhancement on Gd T1WI, hyperintense on T2 and FLAIR
Medulloblastoma is associated with which syndromes?
What is the mutation?
Turcot’s Sx: APC Mutation
Li Fraumeni Sx: TP53 mutation
Gorlin’s Sx: PTCH mutation, sonic hedgehog pathway
Hummingbird appreance on MRI brain is seen in?
What part of brain is involved?
PSP (Progressive Supranuclear Palsy)
Mid Brain Atrophy
Canavan’s disease on MRSpectroscopy show ____.
What gross clinical feature is seen?
What is the other disease in which it is found? What else do you know about that disease?
Increased NAA
Large head
Also seen in Alexander’s Disease, it involves frontal part while canavan’s jnvlove whole brain. Rosenthal fibre also seen.
Revise the table of dysmyelination disorders in mind
Add pic!!
Most common site of extragonal germ cell tumor?
M/c in brain?
What sx is it associated with?
Mediastenum
Pineal
Perinaud sx: uoward gaze palsy
Which brain tumor enlarges in pregnancy?
What are its MRI findings?
Meningioma
- Dural based
- Dural tail sign
- Intense homogenous enhancement
GBM on MRI shows what sign and why?
Butterfly glioma
Due to corpus callosum involvement
Heterogenously intense
Which brain tumor spreads contagiously?
Ependymoma
Ice cream cone sign seen in?
Vestibular schwannoma
Racing car appearance o. MRI is seen in
Agenesis of corpus callosum
Posterior Commisure syndrome is another name for ____.
Significant clinical feature?
Which part of brain is involved for this symptom?
Perinaud’s Sx
Upward gaze palsy (add pic)
Due to compression of Superior Colliculus
Bracket calcification seen in
Intracranial Lipoma (congenital) M/c site is around corpus callosum
Diseases in which Hippocampus involved?
Alzeihmer’s
Meseal temporal sclerosis causing epilepsy
MRSpectroscopy features of glioma?
Choline increase (inc cells) Creatine decrease (dec metabolic activity) NAA decrease (neuron number dec )
