What are the Ishikawa diagnostic criteria for Takayasu arteritis?

Updated: Nov 14, 2018
  • Author: Jefferson R Roberts, MD; Chief Editor: Herbert S Diamond, MD  more...
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The Ishikawa criteria (1986) have been useful in defining Takayasu arteritis. One criterion is age younger than 40 years at diagnosis or at onset of characteristic signs and symptoms of 1-month duration.

Two major criteria involve lesions in the left and right midsubclavian artery, with the most severe stenosis or occlusion present in the mid portion of the artery from a 1 cm point proximal to the left and right, respectively, of the vertebral artery orifices to a 3-cm distal point to the orifice, as determined by angiography.

The minor criteria consist of annuloaortic ectasia or aortic regurgitation on angiography or echocardiography, and lesions of any of the following vessels:

  • Pulmonary artery
  • Left mid ̶ common carotid artery
  • Distal brachiocephalic trunk
  • Descending aorta
  • Abdominal aorta

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