http://www.medscape.com/features/sl...ine2015?src=wnl_edit_tpal&uac=231286SJ#page=5 It takes the 5th slot of 33. Chronic Fatigue Syndrome Gets New Name and Definition The Institute of Medicine (IOM) is taking chronic fatigue syndrome seriously. An IOM report called it a "serious, complex, multisystem disease" that physicians and other healthcare professionals need to view as "real" and diagnose. The report proposed calling it "systemic exertion intolerance disease." "It's time to stop saying that this is a just figment of people's imagination. This is a real disease, with real physical manifestations that need to be identified and cared for," said Committee Chair Ellen Wright Clayton, MD, JD. She is a professor of pediatrics and director of the Center for Biomedical Ethics and Society at Vanderbilt University. Elsewhere in the world the illness is called "myalgic encephalomyelitis."