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A 24-year-old man presented with central cyanosis and dyspnea on exertion for past 2 years. He had no history of epistaxis, melaena, neurological deficit, or congenital heart defect. He had grade 3 clubbing on examination; auscultation revealed a pulmonary vascular bruit.
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Akkineni et al. (2025) studied this question.
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