dr. sa mmadi, should he descare? >> not every cyst is the same kind of cyst. today when we catch them early, the cure rate is extremely high. there are simple cysts, the majority of them, it is a fluid filled sack of fluid. that's the classification that we use. that's a simple cyst. there's two, three and four. his father probably with bosniak 3 and 4. those are cancerous, have tissue in it and calcification. the best study is ultrasound. make sure you follow up with your urologist every year and make sure that if there is any cause of cancer, every intent should be made not to remove the entire kidney, but just part of it. we can do it laparoscopically and that can be done. >> would is bosnjak? >> a professor from nyu that