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Neuroradiology MR > Brain > Flashcards

Brain Flashcards

1
Q

What is the ddx for bilateral globus pallidus T2/DWI hyperintensity?

A 
CO poisoning
Wilson disease
Japanese encephalitis
CJD
Leigh syndrome
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2
Q

What is T1 bright on MR?

A

My best friend is pretty cool

M - melanin
B - blood (subacute) from methemoglobin 
F - fat
P - protein, paramagnetic substances (manganese, copper), posterior pituitary
C - contrast
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3
Q

What are examples of intraventricular lesions?

A 
Colloid cyst
Meningioma
Choroid
Ependymoma
Neurocytoma
Metastases
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4
Q

What is the differential for cerebellopontine angle masses?

A

A - acoustic schwannoma
M - meningioma
E - ependymoma
N - neuropepithelial cyst (arachnoid/epidermoid)

Aneurysms - Vertebral, Basilar, PICA
Lipoma
Arachnoid cyst
Choroid plexus papilloma
Metastases
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5
Q

Which cranial nerves never have nerve sheath tumors and why?

A

Olfactory and optic nerve

White matter tracts from cerebrum and do not have nerve sheaths

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6
Q

What cranial nerves in order of frequency are affected by cranial nerve sheath tumors

A

Usually sensory nerves

Superior division of vestibular cochlear nerve

Trigeminal
Glossopharyngeal
Lower cranial nerves
Pure motor - Rare!

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7
Q

What regions of the brain are affected in herpes encephalitis?

A

Medial temporal lobes (uncus)
Cingulate gyrus of medial frontal and parietal lobes

Affects superficial gray matter

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8
Q

What cranial nerves originate from the midbrain?

A

CN 3 and 4

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9
Q

What cranial nerves originate from the pons?

A

CN 5, 6, 7, 8

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10
Q

What cranial nerves originate from the medulla?

A

CN 9, 10, 11, 12

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11
Q

DDX for CP angle tumours?

A

AMEN

acoustic schwannoma - called vestibular schwanomma
Meningioma
Ependymoma
Neuroepithelial cyst

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12
Q

What is T1 bright?

A 
Fat
Bone Marrow
Methemoglobin
Paramagnetic contrast
Slow flow blood
Radiation changes
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13
Q

What are findings of neurofibromatosis type 2?

A 
M - multiple
I - inherited 
S - schwanomas
M - meningiomas
E - ependymomas
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14
Q

What are the classic areas affected in carbon monoxide poisoning?

A

Globus palladi bilaterally

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15
Q

What are the 4 stages of neurocysticercosis?

A
  1. Vesicular - smooth thin-walled cyst (viable larvae)
  2. Colloidal vesicular - Hyperdense cyst fluid with edema (Degenerating larvae)
  3. Granular nodular - Mild edema (healing)
  4. Nodular calcified - small calcified nodule (healed)
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Neuroradiology MR (1 decks)

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