In this issue of Physician Assistant Clinics , guest editor and emergency medicine physician assistant J. Randy Howell brings his considerable expertise to the topic of Medicine Outside Four Walls . Wilderness and austere medical practice addresses many aspects of this challenging field: recreational medicine (whitewater boating, skiing, rock climbing, backpacking), expedition medicine, global health, prehospital medicine, military medicine, and disaster medicine. In this issue, top experts discuss the unique and varied presentations, diagnostics, training, and treatment options in low resource and austere environments.