I had a mammogram in spring, in April and nothing showed up. Then six months later, in October, I found a lump, pretty big lump, too. So, I went to my doctor right away and he took another mammogram. Nothing. So he said well let's go for ultrasound. He said it may be a cyst, okay. Because cancer doesn't grow that fast, and the last mammogram was in the spring, and this is only six months, that it can't grow that fast, from zero to that big. So, he said it could be a cyst, so ultrasound can tell you it is a cyst or not. That's all ultrasound can do. So ultrasound came out, said no, it's not a cyst. So okay. The last method to find out what is a biopsy.