In the April edition of Critical Decisions in Emergency Medicine, Drs. Danya Khoujah and Wendy Chang take on the great outdoors and discuss the various forms of high-altitude illness, including acute mountain sickness, high-altitude cerebral edema, and high-altitude pulmonary edema. They’ll also discuss the presentation and management of several tick- and mosquito-borne illnesses, such as Lyme disease and West Nile virus, which often go overlooked. As always, you’ll hear about the hot topics covered in CDEM’s regular features, including our newest feature, Clinical Pediatrics.