I'm a 30 yr old female. About 4 yrs ago, they found a hemangioma on liver while doing an ultrasound fir something else. This year they were doing another US for something else and they found 2 more. They are in the right and left lobe. The drs say not to worry, but i requested a follow up US. Can they tell the difference btwn a hemangioma and cancer. Really worried!