Battie Claire, Gohara Mona, Verschoore Michèle, Roberts Wendy
L'Oréal Research and Innovation, Asnières, France.
J Drugs Dermatol. 2013 Feb;12(2):194-8.
For many fair-skinned individuals around the world, skin cancer is the leading malignancy. Although skin cancer comprises only 1% to 2% of all malignancies in those with darker complexions, the mortality rates in this subgroup are substantially higher when compared with their Caucasian counterparts. This discrepancy is largely as a result of delayed detection/treatment, and a false perception among patient and physician that brown skin confers complete protection against skin cancer. Recent studies show that 65% of surveyed African Americans never wore sunscreen, despite living in sunny climates, and that more than 60% of minority respondents erroneously believed that they were not at risk for skin cancer. Dark skin offers some protection from ultraviolet (UV) light. However, there is considerable heterogeneity in skin of color, a phenomenon that is accentuated by mixed heritage. Ethnicity does not confer skin type anymore. People of color do experience sunburn, and from a biological point of view, all skin types appear to be sensitive to UV-induced DNA damage, with an inverse relationship between skin color and sensitivity to UV light. Our population is changing rapidly, and within the next few decades minority populations will become the majority. It is therefore imperative to educate both physicians and patients on the perceived immunity against cutaneous malignancies, the need for sun protection, and the clinical signs of skin cancer in non-Caucasian people, so that future unnecessary mortality can be avoided.
对于世界各地许多肤色白皙的人来说,皮肤癌是主要的恶性肿瘤。尽管皮肤癌在肤色较深的人群中仅占所有恶性肿瘤的1%至2%,但与白种人相比,这一亚组人群的死亡率要高得多。这种差异很大程度上是由于检测/治疗延迟,以及患者和医生存在一种错误观念,即棕色皮肤能完全预防皮肤癌。最近的研究表明,65%接受调查的非裔美国人尽管生活在阳光充足的气候中,但从不涂抹防晒霜,而且超过60%的少数族裔受访者错误地认为他们没有患皮肤癌的风险。深色皮肤对紫外线有一定的防护作用。然而,有色人种的皮肤存在很大的异质性,这种现象在混血人群中更为明显。种族不再决定皮肤类型。有色人种确实会晒伤,从生物学角度来看,所有皮肤类型似乎都对紫外线诱导的DNA损伤敏感,皮肤颜色与对紫外线的敏感性呈反比关系。我们的人口正在迅速变化,在未来几十年内,少数族裔将成为多数。因此,必须对医生和患者进行教育,让他们了解对皮肤恶性肿瘤的认知免疫力、防晒的必要性以及非白种人皮肤癌的临床症状,以便避免未来不必要的死亡。