Chloasma ndi matenda ofala kwambiri okhudza khungu omwe amapezeka m'machipatala. Amafala kwambiri mwa akazi a msinkhu wobereka, ndipo amathanso kupezeka mwa amuna osadziwika bwino. Amadziwika ndi mtundu wofanana pa masaya, pamphumi ndi m'masaya, makamaka ngati mapiko a gulugufe. Achikasu chopepuka kapena bulauni wopepuka, bulauni wolemera kapena wakuda wopepuka.
Pafupifupi mitundu yonse ya anthu amitundu yosiyanasiyana ndi mafuko ang'onoang'ono amatha kudwala matendawa, koma madera omwe ali ndi kuwala kwa dzuwa kwambiri, monga Latin America, Asia, ndi Africa, ndi omwe amapezeka kwambiri. Ambiri mwa odwala matendawa ali ndi zaka za m'ma 30 ndi 40, ndipo anthu azaka za m'ma 40 ndi 50 ndi 14% ndi 16% motsatana. Anthu akhungu loyera amayamba msanga, anthu akhungu lakuda amayamba mochedwa, ngakhale atasiya kusamba. Kafukufuku wochokera kwa anthu ochepa ku Latin America akusonyeza kuti anthu amakhala ndi 4% mpaka 10%, 50% mwa amayi apakati ndi 10% mwa amuna.
Malinga ndi malo omwe melasma imafalikira, melasma ikhoza kugawidwa m'magulu atatu azachipatala, kuphatikizapo pakati pa nkhope (yokhudza mphumi, pamphuno, masaya, ndi zina zotero), zygomatic ndi mandible, ndipo kuchuluka kwa matendawa ndi 65%, 20%, ndi 15%, motsatana. Kuphatikiza apo, matenda ena akhungu omwe amabwera chifukwa cha idiopathic, monga idiopathic periorbital skin pigmentation, akuganiziridwa kuti amagwirizana ndi melasma. Malinga ndi malo omwe melanin imayikidwa pakhungu, melasma imatha kugawidwa m'magulu a epidermal, dermal ndi mixed types, pakati pawo mtundu wa epidermal ndiye mtundu wofala kwambiri, ndipo mtundu wosakanikirana ndiye wotheka kwambiri,Nyali ya matabwaNdi yothandiza pozindikira mitundu ya matenda. Pakati pawo, mtundu wa epidermal ndi bulauni wopepuka pansi pa kuwala kwa Wood; mtundu wa khungu ndi imvi yopepuka kapena buluu wopepuka pansi pa maso, ndipo kusiyana sikuonekera pansi pa kuwala kwa Wood. Kugawa molondola kwa melasma ndikothandiza posankha chithandizo chamtsogolo.
Nthawi yotumizira: Meyi-06-2022
