MRCP2-0356
A 36-year-old female of Asian descent, with no significant medical history, presents after experiencing a syncopal event while gardening. She has been experiencing fever, joint pain, and multiple episodes of vertigo for the past 6 months. Upon examination, a diminished radial pulse is noted in her right arm and a systolic blood pressure difference of 12 mmHg is observed in her upper extremities. A bruit is heard along the right upper extremity, and Dopplers reveal a stenotic area along the subclavian, which is later confirmed by Magnetic Resonance Angiography (MRA). The patient is diagnosed with subclavian steal syndrome. Laboratory tests show a normocytic normochromic anemia, elevated CRP and ESR, negative ANA and ANCA, and all other laboratory tests are within normal range. What is the most likely diagnosis?