Vein Glossary

Below is a glossary of terms related to all aspects of venous disease

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Aneurysm of the Vein
The definition is a ballooning of the vein at greater than 1.5x the diameter of the adjacent veins. Aneurysms can be benign and cause no problems or they can be the source of a clot that can travel to the lungs (pulmonary embolus). The treatment depends on the location and the nearby anatomy.
  -- Aneurysms of the superficial venous system: classification and treatment