One year ago I had a CT due to pain in my abdomen. They found a cystic lesion on my right kidney. They then did an MRI and said it was slightly complex. This February they did another MRI and now want me to have an ultrasound. What I don't understand is, according to my research, it seems that an ultrasound is not as informative as an MRI. Why would they want to now give me an ultrasound after an MRI with contrast? Isn't it working backwards in a way? Can anyone answer this? I am getting nowhere from my doctor until they do the test!!!