An abdominal aortic aneurysm (AAA) can be a bulge from the aorta on the abdomen. The aorta is the key artery that carries blood clear of the guts to other areas of the human body. Key lymphedema (scarce): Some individuals are born without having specified lymph vessels or have abnormalities https://www.sgvascularctr.com/an-introduction-to-vascular-surgery-in-singapore/