ID Flashcards
1
Q
What is the differential for Ring Enhancing Lesions on CT/MRI?
A
MAGIC DR. L Metastasis Abscess GBM Infarct (subacute) Contusion
Demyelinating disease
Radiation necrosis
Lymphoma
2
Q
Patient with AIDS on HAART with CD4 count of 150 with ring-enhancing lesions at the basal ganglia and cortical grey/white matter interface. Disease?
A
Cerebral Toxoplasmosis
EBV DNA in CSF = lymphoma; often described as ‘weakly ring-enhancing’ mass that is solitary and periventricular.
3
Q
Immunocompetent patient has a few weeks of headaches, focal neurological deficits, and a solitary ring-enhancing lesion on brain CT with a fluid collection in the ethmoid sinus following a sinus infection. Most likely cause?
A
Viridian’s strep brain abscess.
Abscess:
50% are direct spread from HEENT infection.
25% are from distal spread (endocarditis/lung).
