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Thoracic aortic aneurysm in BAV, a heterogeneous disease, can be divided into two clusters based on the aortic root involvement. Cluster A is BAV/TAA with aortic root aneurysm—a malignant form and should be treated more aggressively. Cluster B is BAV/TAA without aortic root dilation—a benign form and should be treated conservatively.
