I am stage A without any lymph node enlargement, but WBC count are increasing rapidly (?) (elevating from 20 to 28 for 6 months). My doctor is planning to do CT scan twice in a year. I worry about the radiation risk of CT scan, and I can not understand why CT scanning survey is needed in the present stage; Richter transformation? If so I must have enlarged lymph nodes? Or PLL? If so, can CT scanning reveal PLL? I appreciate if you could tell me your experience (frequency of CT scanning) during watch and wait without any lymph nodes. ( How many times have you done CT scanning in a year when you do not have any lymph nodes? ) I think I do not need CT in the present state. Am I wrong?