Limb-shaking TIA related to moyamoya disease: diagnosis with magnetic resonance imaging and magnetic resonance angiography.

PURPOSE In a case with moyamoya disease, we found the magnetic resonance image and magnetic angiographic studies were helpful for the definite diagnosis of the disease. CASE REPORT A young adult presented limb-shaking transient ischemic attacks caused by moyamoya disease. The magnetic resonance angiography proved the steno-occlusive lesions in the major arteries of circle of Willis, and the magnetic resonance images demonstrated compensatively congested and dilated leptomeningeal vessels and lenticulostriate arteries with exhausted vasomotor elasticity. CONCLUSION In this case, without the aid of conventional angiography, the noninvasive magnetic resonance studies offered explicit imaging evidence to support the diagnosis and to illuminate the patient's clinical manifestation.