new_n_lost
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A 42-year-old man with advanced HIV disease presented with a tonic-clonic seizure. He had been diagnosed with HIV 10 years previously, but had elected not to take antiretroviral therapy. A CT scan of his brain showed a 2 cm ring-enhancing lesion in the right parietal lobe.
What is the probable causative agent?
1) Cryptococcus neoformans
2) Mycobacterium avium intracellulare
3) Mycobacterium tuberculosis
4) Pneumocystis carinii
5) Toxoplasma gondii
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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
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| rock
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1-cryptococcus
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| tanmaynator
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e toxoplasma gondii
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| mms
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5) ?
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| keepgoing
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ring-enhancing lesion --> e
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| jole
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E
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| new_n_lost
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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
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| new_n_lost
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This is a typical presentation with AIDS-related cerebral toxoplasmosis. The differential diagnosis of ring-enhancing lesions on CT in a patient with AIDS includes
(1) Cerebral toxoplasmosis
(2) abscesses
(3) metastases
(4) atypical CNS lymphoma.
Cryptococcus typically causes a meningitis.
CNS infections with the remaining organisms are rare in AIDS.
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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
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