I had a CT scan this past weekend and blood work done since I went to the ER complaining of abdominal and back pain. I was diagnosed with a urinary tract infection and am feeling much better. They did find a 1/2 inch cyst on my liver which my internist wants to do an MRI on. My blood work all looks good. She says that she sees them all the time and that I should not worry, but I am just scared because I never even knew these things existed. Should I have any concern?