type of problem, in a kidney. there is a tumor made up of vascular cells. it s the cellular arteries are made out of, also muscle cells in fat cells altogether. it s a benign condition. we don t know that the first lady has that but typically embolization therapy used to treat these conditions. while they are benign, they can grow. if they do grow to a certain point, they can begin to damage the kidneys. there s also a risk of bleeding. what doctors do is they thread a catheter through the femoral artery which is the main artery in your leg down by the groin. then they go through through te abdominal aorta. whichever kidney they go to. they deposit tiny, tiny plastic