I can understand your concern @rensacb for a plan to maintain surveillance of a Bosniak 2f renal cyst. In my case, we have not scheduled followup imagery on my cyst; we are satisfied to look in on it whenever imaging for some other examination is scheduled. Another factor I have found to be important: My specialists and I regard our radiologists as highly technical experts for identifying tissues and their aberrations from their images, but not fully qualified to prescribe therapies to deal with what the radiologist sees and describes. Instead, my Primary Care Physician and the other physicians on my medical team take the lead, and I rely on them for treatments and treatment plans. Your spleen cyst is relatively small -- about a quarter of an inch. Are any symptoms causing your concern there, or is it on your mind because it is a new anomaly? Perhaps your PCP will discuss with you how to pursue information about your spleen and whether you need a specialist to assess its status. Martin