This CT scan shows a cross section of the lungs of a person with lung cancer. The two dark areas in the middle of the screen are the lungs. The light areas in the right lung represent the cancer (left side of picture).
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.