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Kaplan Qbank USMLE



Author7 Posts
  #1

A 23-year-old man has the sudden onset of left-sided weakness. He has been HIV positive for 3 years and has a CD4+ lymphocyte count of 30/mm3 (Normal?500). His temperature is 38.5°C (101.3°F), blood pressure is 100/70 mm Hg, pulse is 100/min, and respirations are 14/min. There is weakness and diminished perception to light touch and pinprick on the left upper and lower extremities. A CT scan of the head with contrast enhancement is shown. Which of the following is the most likely explanation for the weakness?

O A) Cerebral toxoplasmosis
O B) Cryptococcal meningitis
O C) Herpes encephalitis
O D) Kaposi's sarcoma
O E) Progressive multifocal leukoencephalopathy
Pls explain u r answer. Thanks.

  #2

looks llike E since the CT scan is not here.

Cerebral Toxoplasmosis and PML can cause motor and sensory abnormalities and both can be seen in CT scan. PML typical occurs at CD 4 <100, and Toxoplasmosis CD4 will be 100-200.


  #3

confusedbetween A and Econfused

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  #4

I think it`s E

  #5

A FOCAL NEUR. SIGN

  #6

STILL NEED THE TRUE ANSWE PLZ
WITH THE EXAPLAINATION

  #7

i havent seen the CT scan...it will be very useful i think....however...the case is a cute onset with focal neurology....presentation is of a mass rather than meningitis or encephalitis...that leaves us with A or E...PMLE is of insidious onset....takes weeks to months...usually afects parietooccipital area...presentiing with aphasia or blindness...all the symptoms come gradually rather tha in a day or 2 as given in this scenario...the lesions usually donot enhance with contrast...this is where looking at the CT will be useful.....that leaves us with AAAAAAAAAAAAAA....so i go for A

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