Tulip bulb sign

Last revised by Joshua Yap on 27 Jul 2022

The tulip bulb sign refers to the characteristic appearance of annuloaortic ectasia as seen on CT angiography.

There is symmetric dilatation of the three sinuses of Valsalva, with extension into the ascending aorta and effacement of the sinotubular junction

It is seen especially in Marfan syndrome, with 60-80% patients affected 1.

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