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				 hmmm 
 Gil,I think you have to have a pretty thorough workup and from what I know vasculitis can be related to immune system response with inflammation of the arteries/vascular system (that much is obvious)..  different cases/different causes such as related to a insect bite or virus or something of this nature.
 
 What is your doctor doing to treat it??  What medicines are you taking that might have that as a reaction as a possibility?
 
 sorry to hear of this development and hope you are getting proper treatment.
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