Don't choose biopsy for the following conditions - USMLE Forums
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USMLE Step 2 CK Bits & Pieces High yield short focused points, monographs, charts, illustrations, tables, and other stuff related to the USMLE Step 2 CK Exam.


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Old 05-31-2011
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Smile Don't choose biopsy for the following conditions

These are few condition in which biopsy is wrong answer.
1- Primary sclerosing cholangitis. Best is ERCP.
2- Encephalitis.
3- Brain abscess if the patient is HIV positive than therapy for toxoplasmosis if it do not work than biopsy however patient who are HIV negative than biopsy.
4- Encephalitis never chose this option best is CSF PCR
5- Nephrotic syndrome in which patient information is enough for you to diagnose nephrotic syndrome i.e, protienuria >3 gm/day.

Well I remember these conditions if someone knows other conditions in which biopsy is wrongly selected please add on...
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  #2  
Old 05-31-2011
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ulcers in the deudenum... Because they are never malignant, no need for a biopsy there...
As i recall goljan saying it once
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Old 06-01-2011
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Quote:
Originally Posted by insomnic View Post
Well I remember these conditions if someone knows other conditions in which biopsy is wrongly selected please add on...
Testicular CA: Painless lump that does not transilluminate.
Needle biopsy is always a wrong answer. We remove the whole testes from an inguinal approach, not the scrotal as it can spread the disease.

"Testicular CA is the tumor that we kill first and investigate later"
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Old 06-01-2011
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Correct Answer Juvenile Nasopharyngeal angiofibroma JNA

JNA does not need a biopsy. In a typical presentation, young male pt in second decade presenting with recurrent epistaxis. Diagnosis is made on basis of characteristic CT findings like destruction of root of medial pterygoids and on angiography.
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Old 06-02-2011
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Here I found another disorder that in which biopsy is not the most accurate investigation and it is Takayasu disease, the only vasculitis which do not required biopsy. The best diagnostic investigation is MRA.
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