Chloasma yakajairika inowanikwa ganda pigmentation kusagadzikana mukiriniki maitiro. Inowanzoitika muvakadzi vezera rekubereka, uye inogonawo kuonekwa kune varume vashoma vanozivikanwa. Inoratidzwa ne symmetrical pigmentation pamatama, huma nematama, kunyanya muchimiro chemapapiro e butterfly. Chiyero cheyero kana chishava chakajeka, chinorema chitema chitema kana chitema.
Anenge ese madzinza uye madiki madiki anogona kukura chirwere ichi, asi nzvimbo dzine yakanyanya kuratidzwa UV, seLatin America, Asia, neAfrica, dzine chiitiko chepamusoro. Vazhinji vevarwere vanokura chirwere mumakore avo makumi matatu nemakumi mana, uye chiitiko mu40- uye 50-makore ekuzvarwa ndeye 14% uye 16%, zvichiteerana. Vanhu vane ganda rakajeka vanokurumidza kutanga, vane ganda dema vanokura pave paya, kunyange pashure pokunge vaguma kuenda kumwedzi. Ongororo kubva kuvanhu vashoma muLatin America inoratidza chiitiko che4% kusvika 10%, 50% muvakadzi vane pamuviri uye 10% muvarume.
Zvinoenderana nenzvimbo yekugovera, melasma inogona kukamurwa kuita matatu emakiriniki emhando, kusanganisira yepakati-chiso (inosanganisira huma, dorsum yemhino, matama, nezvimwewo), zygomatic uye mandible, uye huwandu hwezviitiko i65%, 20 %, uye 15%, zvichiteerana. Mukuwedzera, zvimwe zvirwere zveganda zveidiopathic, zvakadai seidiopathic periorbital skin pigmentation, inofungidzirwa kuti inosanganiswa ne melasma. Zvinoenderana nenzvimbo yekuisa melanin paganda, melasma inogona kukamurwa kuita epidermal, dermal uye yakasanganiswa mhando, pakati peiyo epidermal mhando ndiyo yakajairika mhando, uye yakasanganiswa mhando ndiyo inonyanya kuitika.Mwenje wehuniinobatsira pakuzivikanwa kwemhando dzekiriniki. Pakati pavo, rudzi rwe epidermal rutsvuku pasi pechiedza che Wood; iyo dermal type ndeyechiedza grey kana mwenje bhuruu pasi peziso rakashama, uye mutsauko hausi pachena pasi pechiedza che Wood. Kurongeka kwakaringana kwe melasma kunobatsira pakusarudzwa kwekurapwa kwepashure.
Nguva yekutumira: May-06-2022
