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  #1  
Old 10-29-2012
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Arrow Billy Step 1 Questions # 57

A 55-year-old recent immigrant from Taiwan presents to the clinic with a 3-month history of worsening nasal congestion, epistaxis, and recurrent ear infections. Physical examination reveals painless fi rm lymph node enlargement in the neck. CT of the head reveal a large mass situated in the upper nasopharynx. Biopsy of the lesion shows large epithelioid cells intermixed with numerous infi ltrating lymphocytes. The infectious agent directly associated with this patient’s pathology is best described by
which category?


(A) DNA virus
(B) Eubacterium
(C) Fungus
(D) Mycobacterium
(E) RNA virus

Last edited by billy; 10-29-2012 at 11:47 AM. Reason: k
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  #2  
Old 10-29-2012
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A dna virus, i guess its epstein barr virus
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Old 10-29-2012
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Quote:
Originally Posted by nuziveed View Post
A dna virus, i guess its epstein barr virus
Yeah EBV makes sense, nasopharyngeal carcinoma. So A should be the answer.
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Old 10-29-2012
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A) EBV(DNA)...

thanks
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  #5  
Old 10-29-2012
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Default my answer :)

(A) DNA virus - EBV?
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Default my asnwer A

looks like EBV ,,,,mmm but "large epithelioid cells intermixed with numerous infi ltrating lymphocytes" --> granuloma?
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  #7  
Old 10-30-2012
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Correct Answer A is correct

This patient has developed nasopharyngeal carcinoma, a condition
common in certain parts of the world, including Asia and Africa. Development of this tumor is always associated with infection by Epstein-Barr virus (EBV), a DNA virus in the herpesvirus family. Development of this tumor is believed to be related to a synergistic interaction between EBV and a diet high in carcinogenic nitrosamines (common in foods that has been smoked or preserved). Common symptoms include nasal congestion, epistaxis, ear infections (due to tumor-induced blockage of the Eustachian tubes), and headache.
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Old 10-31-2012
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EBV(DNA virus)>>>>>Nasopharyngeal ca
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