Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF ++ Kathryn L. Butler, MD ++ Assistant in Surgery ++ Division of Trauma, Emergency Surgery, and Surgical Critical Care ++ Massachusetts General Hospital ++ Instructor in Surgery ++ Associate Director of Surgery Clerkship ++ Harvard Medical School ++ ++ Associate Editor ++ Mukesh Harisinghani, MD ++ Professor of Radiology ++ Harvard Medical School ++ Director of Abdominal MRI ++ Massachusetts General Hospital