Incidence of Skin Cancers and Precancerous Lesions in Japanese Risk Factors and Prevention -

Prevalence of precancerous skin lesions and non-melanoma skin cancer in Japanese-Brazilians in Bauru, São Paulo State, Brazil

“…In Japan, prevalence of actinic keratosis is 0.76%-5% 19,23,24 . Actinic keratosis is 3.5 times more frequent in the Southeast of the country, which receives a higher dose of UV rays, and five times more frequent in Japanese fishermen as compared to farmers 25 .…”

“…As compared to Japanese, Japanese-Brazilians present a higher risk of developing these skin Table 4 Prevalence of actinic keratoses in Japanese-Brazilians in Bauru, São Paulo, Brazil, and in Japanese in Kasai 19,24 and Ie Island, Japan 23,25 . alterations because they live in a tropical country with intense exposure to ultraviolet rays, and with a predominantly agricultural economy in some regions 28 .…”

UV-induced skin cancer at workplace and evidence-based prevention

“…Cumulative UV exposure is mainly determined by either outdoor occupation or recreation and is supplemented by use of tanning parlours or phototherapeutic measures (Saladi and Persaud 2005;Elsner et al 2007). Although often confounded by concurrent leisure time sun exposure and prone to selfselection bias several studies from USA, Japan, and Europe have detected a significant association between skin cancer and outdoor occupation (Freedman et al 1997;Araki et al 1999;Walther et al 2004;Marehbian et al 2007;Hensen et al 2009;Lichte et al 2009;Radespiel-Tröger et al 2009). In the field of occupational medicine, the UV radiation encompasses natural UV exposition by the sun as well as exposition to artificial UV sources.…”

“…In cohort and case-control studies excess risks of non-melanoma skin cancer were identified for outdoor workers (Freedman et al 1997;Araki et al 1999;Walther et al 2004;Marehbian et al 2007;Hensen et al 2009;Radespiel-Tröger et al 2009;Lichte et al 2009). Additionally, work-related exposure to artificial UV-light is for example given in welding, in materials testing and in sterilization (Bajdik et al 1996;Emmett et al 1981;Currie and Monk 2000).…”

An extract of Polygonum multiflorum protects against free radical damage induced by ultraviolet B irradiation of the skin

“…The incidence of ultraviolet B (UVB)-related skin problems and the interest in protecting the skin from the harmful effects of UVB are increasing (1)(2)(3). Although UVB represents only a small part of the UV spectrum, it has potent biological effects in terms of skin cancer (4), skin aging (5) and cataract formation (6,7).…”