Imaging characteristics of Takayasu arteritis.

Takayasu arteritis is a rare, large-vessel vasculitis in which the nonspecific systemic inflammatory symptoms are followed by inflammation of the aorta and its major branches. The inflammation of this vessel leads to progressive luminal stenosis or aneurysm formation resulting in limb or organ ischemia. Although conventional angiography is still accepted as the gold standard modality, the information obtained is limited to the vessel lumen. Multidetector computed tomographic angiography and magnetic resonance angiography can provide valuable information not only regarding intraluminal pathologies but also concerning the thickening of the vessel wall, which may be the earliest manifestation of the disease.