Hypersensitivity Vasculitis versus Polyarteritis Nodosa - USMLE Forums
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Old 08-08-2011
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Vascular Hypersensitivity Vasculitis versus Polyarteritis Nodosa

A medical student reads about the different vasculitides and has difficulty memorizing all the details. In order to assist him, you advise that one way to differentiate hypersensitivity vasculitides from polyarteritis nodosa is to identify:
A. Size of blood vessel involved
B. Underlying malignancies
C. Skin and musculoskeletal complains
D. Chronology of the lesions
E. Presence of immune complex vasculities
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Old 08-08-2011
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A) size of the blood vessels involved
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Old 08-08-2011
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a) on palpation nodes if it is poliarteritis nodosa, so maybe it is size
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Old 08-08-2011
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A.size of blood vessels involved
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Old 08-08-2011
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other opinion D) chronology of lesions
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Old 08-09-2011
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I disagree

The major difference between PAN (polyarteritis nodosa) and hypersensitivity vasculitides, such as serum sickness and Henoch-Schonlein purpura, is to identify the chronology of the lesions. PAN will have vascular inflammation of different ages while the lesions in hypersensitivity vasculitides are all the same age. Both types of diseases have small blood vessel involvement, are associated with underlying malignancies and have immune complex deposits
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Old 12-08-2011
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wow if the q's are like this on the exam , my hopes of passing are slim to none
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