Must-Knows Flashcards

1
Q

Most common cerebellopontine angle (CPA) tumors

A

Acoustic neuroma

Meningioma

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2
Q

Lesion in frontal eye field vs seizure

A

Frontal eye field lesion: deviation towards lesion

Seizure: deviation to opposite

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3
Q

What does DWI enhances?

A

Stroke, abscess, epidermoid

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4
Q

EDH is associated with what? Crossing sutures and falx?

A

Associated with skull fracture (and pneumocephalus).

Don’t cross sutures. Can cross falx

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5
Q

Operative indication for EDH

A

Especially > 30 cc

Nonsurgical ok in 8GCS, no deficit (ALL requirements)

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6
Q

When to operate for compression fracture?

A

3 contiguous levels or wedge fracture

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7
Q

Where is the tegmen?

A

Tegmentum typamni - between cranial and tympanic cavities, thin bone

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8
Q

What can cause vertebral dissection?

A

Archery, sneezing, sudden neck movement

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9
Q

Gradenigo sign

A

CN6 palsy, retro-orbital pain, draining ear (mastoiditis spreading along petrous bone and CN6)

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10
Q

Annulus of Zinn

A

Divides components of superior orbital fissure

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11
Q

Cavernous aneurysm - typical progression

A

Fistulize upon rupture, may cause mass effect before

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12
Q

PCA runs through what?

A

Ambient cistern (lateral to the medulla)

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13
Q

How do you present a scan on rounds?

A

This is a , then

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14
Q

How do you calculate midline shift?

A

Use the septum pellucidum

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15
Q

Path of CN 3 and 6

A

Very medial, right over clivus. Also for 4 and 5

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16
Q

Decrease ICP can cause what?

A

Bilateral CN6 palsy

17
Q

Most common site for intraventricular meningioma

A

Left trigone of lateral ventricle

18
Q

What is the inferior venous drainage for temporal lobe?

A

Inferior anastomotic vein of labbe

19
Q

Neurosarcoid can present as what?

A

Multiple cranial neuropathy

20
Q

What are gelastic seizures

A

hypothalamic seizures caused by hamartoma

21
Q

Sellar lesion differential

A
SATCHMOL
Sarcoid/pit adenoma
Aneurysm
Teratoma
Craniopharyngioma/RCC/Chordoma
Hamartoma
Meningioma/mets
Optic glioma
Lymphoma
22
Q

Postop transphenoidal triple phase

A

1) DI due to acute injury
2) cell death cause release and transient SIADH
3) delayed DI

23
Q

Mollaret’s

A

Epidermoid cysts can give rise to aseptic meningitis

24
Q

Lillequist’s membrane

A

Separates interpeduncular cisterns from chiasmatic cistern - localizes SAH

25
Q

Transsphenoidal anatomy

A

Superiorly: circular sinus connects cavernous sinus - site of bleeding
Midline in sphenoid is the rostrum.

26
Q

Subdural membrane

A

Immune/inflam rxn to chronic blood - why we need to evacuate clot to prevent from reforming a membrane

27
Q

Posterior pituitary on T1

A

Enhances

28
Q

Mega cisterna magna

A

Between cerebellum and dorsal surface of medulla oblongata. Large cisterna magna is benign. Ddx include arachnoid cyst.

29
Q

Herniated disc level lateral vs posterolateral vs lumbar stenosis

A

Posterolateral: level below
Far lateral: level above
Lumbar stenosis: level above