Melanocytic Nevi Prevalence and the Relationship with Sun Exposure Among School Children

Amaç: Melanositik nevüs (MN) say›s› melanom geliflimi için en güçlü risk faktörü olarak bilinmektedir. Bu nedenle bir toplumda MN say›s›n›n bilinmesi önemlidir. Çal›flmada ilkokul ça¤› çocuklar›nda MN prevalans›n›n belirlenmesi, yap›sal özellikler ve günefl maruziyeti ile MN say›s› aras›ndaki olas› iliflkinin a盤a ç›kar›lmas› amaçlanm›flt›r. Gereç ve Yöntem: Randomize, kesitsel düzenlenen bu çal›flma için ilkö¤retim okullar›nda e¤itim alan çocuklar›n deri fenotipleri ve bir önceki yaz günefle maruziyetlerinin sorguland›¤› bir anket haz›rland›. Dokuz yüz altm›fl anket ebeveynlere ulaflt›r›ld›. Ailesi taraf›ndan izin verilen çocuklar tüm vücut MN’leri aç›s›ndan muayene edildi. Bulgular: Anketler 939 çocu¤un ebeveynleri taraf›ndan yan›tland›, 622 çocuk muayene edildi. Yafl ortalamas› 8,8±1,5 (6-12) olan çocuklar›n, 316’s› erkek 306’s› k›zd›. Okul çocuklar›nda MN say›s› ortalamas› 19,6±16,6 idi ve bu say› yaflla artmaktayd› (p<0,001). MN say›s› ile cinsiyet, deri fototipi ve deri rengi aras›nda anlaml› iliflki saptand›. Erkeklerde (p<0,001), günefle duyarl› deri tipi (p=0,03) ve aç›k deri rengine (p<0,001) sahip çocuklarda daha fazla MN vard›. Bir önceki yaz gün içinde d›flar›da geçirilen süre, MN say›s›n› etkilememiflti (p=0,35). MN say›s› ile geçen yaz yaflanan günefl yan›¤› say›s› aras›nda bir iliflki saptanmad› (p=0,11). MN’lar en yo¤un olarak yüzde, azalan s›ra ile üst ekstremite, gövde ve alt ekstremitede yerleflmiflti. Kollar, eller ve ayaklar›n daha çok günefl gören k›s›mlar›nda daha fazla MN vard›. Sonuç: Bu çal›flmada okul çocuklar›nda bir önceki yaz yaflanan günefl maruziyetinin MN say›s›n› etkilemedi¤i saptanm›flt›r. Ancak MN say›s›n›n deri fenotipi ile iliflkisi ve MN’lerin vücuttaki da¤›l›m›, günefl maruziyetinin MN say›s›n› etkileyebilece¤i ve bu etkinin uzun bir zaman süreci içinde ortaya ç›kabilece¤ini düflündürmektedir. (Türkderm 2009; 43: 149-54) Anahtar Kelimeler: Melanositik nevüs, çocuk, günefl maruziyeti

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