Ct report shows less the 4 cm anyerusm in the root thoracic aeorta. i suffer from anxiety/every chest pain i get i fear it's rupturing. any advice ?

Low risk: While this is nothing to be ignored, the chance of rupture at this size is very small. It is important that it be followed regularly so that if it enlarges, it can be repaired before it gets to the size where the risk of rupture is greater. This is especially so if you have marfan's syndrome. Talk to your doctor about your anxiety and see a specialist if you have not already done so.

Low Risk: A 4 cm aortic root is barely outside the normal range. Unless you have a connective tissue disorder the chance of it rupturing is very very low.

Not concerning: A 4 cm aneurysm of the aortic root is usually not concerning. There is a small chance of having a complication. I would recommend an echocardiogram to evaluate the aortic valve. It can be associated with aortic valve disease. Make sure the measurement of the root is performed with ct or mri, echocardiograms are notorious for incorrectly estimating the size of the aortic root and ascending aorta.