title: Multiple chemical sensitivity and idiopathic environmental intolerance (part one).
abstract: Multiple chemical sensitivity/idiopathic environmental intolerance (MCS/IEI) is a commonly used diagnostic term for a group of symptoms. These symptoms have been described and commented on for more than 15 years in the USA. Recently, it has also been observed in Japan. The main features of this syndrome are multiple symptoms involving in multiple organ systems that are precipitated by a variety of chemical substances with relapses and exacerbation under certain conditions when exposed to very low levels which do not affect the population at large. There are no laboratory markers or specific investigative findings. Although traditional medical organizations have not agreed on a definition for this syndrome due to the lack of obvious evidence to demonstrate the existence of these symptoms, it is being increasingly recognized. It constitutes an increasing percentage of the caseload at occupational/environmental medical clinics.Part one of this review article discusses pathophysiological theories, substances which cause symptoms, prevalence in the general and specific populations, past history and family history, and clinical symptoms of MCS/IEI patients.
authors: Department of Preventive Medicine and Public Health, Kitasato University School of Medicine, 1-15-1 Kitasato, 228-8555, Sagamihara, Kanagawa, Japan.
authors: Mitsuyasu
authors: M
authors: Watanabe
authors: Hideki
authors: H
authors: Tonori
authors: Yoshiharu
authors: Y
authors: Aizawa