Infectious Encephalopathies

Question 1

what can cause a ring-enhancing mass on MRI?

Answer 1

GBM (high-grade glioblastoma)

abscesses

Question 2

where do abscess most likely arise from w/i your body?

Answer 2

lung**

heart

Question 3

a microglial nodule tells you what?

Answer 3

viral

Question 4

what are the most common causes of acute encephalitis?

Answer 4

HSV*
EBV
CMV
Human Herpes Virus 6

Question 5

what causes enlarged ventricles lined by calcification and necrosis?

Answer 5

CMV

most common intrauterine infection (neonates)

Question 6

What kind of virus is rabies? What family?

Answer 6

RNA

Rhabdovirus family

Question 7

Negri Bodies: disease? location? microscopic image?

Answer 7

Rabies
cerebellum
no ground glass bc virus replicates in cytoplasm

Question 8

multinuclear giant cell

Answer 8

HIV

subacute encephalitis

Question 9

bradyzoites

tachyzoites

Answer 9

Toxoplasmosis

imaging = lots of masses!

Question 10

Mucicarmine stain

Answer 10

Cryptococcosis (yeast-variant fungus)

Question 11

overgrows in stagnant water in ponds and swimming holes

Answer 11

Entamoeba histolytica (intestinal parasite) 
Naegleria fowleri (fresh water)

Question 12

what part of the brain does Entamoeba Histolytica affect?

Answer 12

looks like HSV, but it affects the frontal lobes

Question 13

most common parasitic infection of the CNS

Answer 13

Cysticercosis = larval form of the pork tapeworm, Taenia solium

Question 14

microscopy = coalescing bubbles in the neuropil AND neuron

Answer 14

prion disease