Neuro-infectious + epilepsy Flashcards

1
Q

Describe the 4 imaging stages of brain abscess
One (2)
Two (2)
Three (3)
Four (3)

A

Early cerebritis
- Poorly marginated
- little-to-no enhancement
Late Cerebritis
- Irregular rim enhancing lesion
- hypodense center
Early capsule
- well-defined rim-enhancing mass
- outer hypodense and inner hyperdense rim (double rim sign)
Late capsule
- Thickened capsule
- diminished hypodense cavity

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2
Q

Imaging features of Herpes simplex encephalitis (2)

A
  • preferential involvement of mesial temporal lobes
  • If hemorrhagic, blooming on GRE/SWI
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3
Q

Imaging features of Japanese Encephalitis (3)

A
  • Predominant involvement of deep gray matter
  • Especially bilateral thalami (though can be asymmetric)
  • Spares cortices
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4
Q

Imaging features of Neurocysticercosis:
Vesicular (3)
Colloidal vesicular (2)
Granula Nodular (3)
Nodular Calcified (2)

A

Vesicular:
- T1 hyperintense scolex
- Dot sign (cyst with eccentric scolex)
- No or faint enhancement
Colloidal vesicular
- T1 hyperintense with edema
- Dot sign
Granular nodular
- less edema
- cyst retracts
- enhancement persists but less marked
Nodular calcified
- no enhancement
- no edema

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5
Q

Spectroscopy finding to suggest toxoplasmosis

A

Increased Lipid lactate peak

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