aortic sinus aneurysm

a·or·tic si·nus an·eu·rysm

abnormal dilation of one or more of the three aortic sinuses situated behind the three aortic valve cusps.
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References in periodicals archive ?
First, the aortic sinus aneurysm caused a large defect (14 mm diameter), and some of the adjacent tissues were fragile and weak.
Ruptured aortic sinus aneurysms typically express themselves in young men after puberty but before age 30 years (4).