MelanosisTretinoinChemexfoliationKeratolytic AgentsHyperpigmentationLentigoAcne VulgarisAdministration, TopicalOintmentsDermatologic AgentsSkin AgingCosmeticsFacial DermatosesSkin CreamLasers, Solid-StateTrichloroacetic AcidCausticsBetamethasone ValerateLasers, GasGlycolatesAcitretinPhyllanthus emblicaSkin PigmentationNicotinic AcidsEmollientsKeratosis, ActinicSkin CareFacial InjuriesLaser Therapy, Low-LevelNeurocutaneous SyndromesCarcinoma, Basal CellMelanocytesGlycyrrhizaMelanosomesLincomycinRetinoidsAdministration, CutaneousSkinMonophenol MonooxygenaseHydroquinonesNevus, PigmentedMelaninsDrug CombinationsHemangiomaTreatment OutcomeDouble-Blind MethodAntineoplastic AgentsKeratinocytes