A CT scan of the upper abdomen showing a fist-sized cyst of the left kidney and gallstones (the kidney cyst was found by chance; there were no symptoms. Update Date: 06/03/2008Linda Vorvick, MD, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.