Chloasma cuta ce da aka saba samu ta launin fata a cikin aikin asibiti. Yawanci yana faruwa a cikin matan da suka kai shekarun haihuwa, kuma ana iya ganin su a cikin maza da ba a san su ba. Ana siffanta shi da launi mai ma'ana akan kunci, goshi da kunci, galibi a cikin siffar fuka-fukan malam buɗe ido. Hasken rawaya ko launin ruwan kasa mai haske, launin ruwan kasa mai nauyi mai duhu ko bakin haske.
Kusan dukkanin kabilanci da tsiraru na iya haifar da cutar, amma yankunan da ke da tsananin UV, irin su Latin Amurka, Asiya, da Afirka, suna da matsala mafi girma. Yawancin marasa lafiya suna kamuwa da cuta a cikin shekarun 30s da 40s, kuma abin da ya faru a cikin masu shekaru 40 da 50 shine 14% da 16%, bi da bi. Mutane masu launin fata suna tasowa da wuri, masu duhu suna tasowa daga baya, ko da bayan al'ada. Bincike daga ƙananan jama'a a Latin Amurka ya nuna abin da ya faru na 4% zuwa 10%, 50% a cikin mata masu juna biyu da 10% a cikin maza.
Dangane da wurin da aka rarraba, ana iya raba melasma zuwa nau'ikan asibiti guda 3, gami da tsakiyar fuska (wanda ya shafi goshi, dorsum na hanci, kunci, da sauransu), zygomatic da mandible, kuma adadin abubuwan da suka faru shine 65%, 20. %, da kuma 15%, bi da bi. Bugu da ƙari, wasu cututtukan fata na idiopathic, irin su idiopathic periorbital fata pigmentation, ana tsammanin suna da alaƙa da melasma. Dangane da wurin da aka sanya melanin a cikin fata, ana iya raba melasma zuwa epidermal, dermal da kuma gauraye iri, daga cikinsu nau'in epidermal shine nau'in da ya fi yawa, kuma nau'in gauraye shine mafi kusantar.Fitilar itaceyana taimakawa don gano nau'ikan asibiti. Daga cikin su, nau'in epidermal shine launin ruwan kasa mai haske a ƙarƙashin hasken itace; nau'in dermal yana da launin toka mai haske ko shuɗi mai haske a ƙarƙashin ido tsirara, kuma bambancin ba a bayyane yake a ƙarƙashin hasken itace ba. Daidaitaccen rarrabuwa na melasma yana da fa'ida ga zaɓin jiyya na gaba.
Lokacin aikawa: Mayu-06-2022
