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periangiitis

(pĕr′ē-ăn′jē-ītĭs)
n.
  1. Inflammation of the adventitia or the tissues surrounding a blood vessel or lymphatic vessel.perivasculitis
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.