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medRxiv PreprintsInternational3 November 2026

Fibromuscular Dysplasia in Acute Type A Aortic Dissection: A Common yet Underrecognized Vascular Phenotype in Women

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Objectives: Fibromuscular dysplasia (FMD) is a non inflammatory, non atherosclerotic arterial disease characterized by multifocal arterial beading that predominantly affects women. Although FMD commonly involves the renal and carotid arteries, its relationship with acute type A aortic dissection (ATAAD) remains poorly understood. We investigated the proportion of patients with FMD among patients with ATAAD, focusing on sex based differences. Materials and Methods: Patients aged below 70 years with ATAAD and ECG triggered aortic CT angiography (CTA) were consecutively included in this retrospec
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