Book excerpt: Featuring 1,785 CT and MRI images and 460 cases from leading medical centers, this Second Edition is a comprehensive teaching-file atlas covering virtually all abdominal and pelvic diseases. Cases are presented as unknowns in a consistent format—a brief clinical history, several images, relevant findings, differential diagnosis, final diagnosis, and a discussion. This format helps readers hone their diagnostic reasoning skills and offers excellent preparation for radiology board exams. This edition includes 245 brand-new cases, new images for 190 cases, and a new abdominal wall chapter. Images reflect state-of-the-art technologies, including multidetector row CT, 3D reformatted images, and breath-hold MRI sequences.