The word aortic ("relative to the aorta") exists, but with 'abdomen' I have my doubts, and more when it is already very common abdominal, perhaps as the first component of another word (already without tilde) or in voices combined with a hyphen. Ca also exists, but has no relation to the previous ones.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
