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Results 1 - 1 of 1 for Rare venous malformation
  1. Arteriovenous Malformations (National Library of Medicine)  
    ... and veins. This can weaken the arteries and veins. A weakened artery or blood vessel could burst or leak blood. What causes arteriovenous malformations (AVMs)? AVMs are rare. The cause of AVMs is unknown. Most of ...