Dermal melanosis

Dermal melanosis planae sunt maculae irregulares caeruleae vel caeruleae‑canae, quae plerumque in infantia aut mox post apparent. Melanocytosis dermal congenita (olim Mongolica caerulea) genus notae est.

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      References Optimizing Q-switched lasers for melasma and acquired dermal melanoses 30027914
      Laser Q‑switched Nd:YAG curatio notissima est maculis cutis pigmentatis, tam in stratis quam in profundis. Fere plures sessiones ad bonum effectum requiruntur. Usus low‑energy Q‑switched 1064 nm Nd:YAG laser (multi‑pass technique and larger spot size) propositus est ad tractandum melasma.
      The Q-switched Nd:YAG laser is a well-known treatment for pigmented skin spots, both on the surface and deeper layers. Usually, several sessions are required for good results. Using a low-energy Q-switched 1064nm Nd:YAG laser (multi-pass technique and larger spot size) has been proposed as a way to treat melasma.
       Dermal Melanocytosis 32491340 
      NIH
      Congenital dermal melanocytosis, etiam macula Mongolica, nota est. Commune genus notae in fœtibus visum est. Apparet sicut macula griseo‑caerulea inaequalis in cute a nativitate vel paulo post. Hae maculae typice reperiuntur in clunibus, dorsi inferioris, et in zona scapulari, prope locum communem. Frequentiores sunt in infantibus Asiaticis et Afro‑descendentibus, affectantes tam pueros quam puellas. Fere resolvuntur a aetate 1‑6 annorum et plerumque non requirunt curationem, quia sunt in genere innocuae.
      Congenital dermal melanocytosis, also known as Mongolian spot or slate gray nevus, is one of many frequently encountered newborn pigmented lesions. It is a type of dermal melanocytosis, which presents as gray-blue areas of discoloration from birth or shortly thereafter. Congenital dermal melanocytosis is most commonly located in the lumbar and sacral-gluteal region, followed by shoulders in frequency. They most commonly occur in Asian and Black patients, affect both genders equally, and commonly fade by age 1 to 6 years old. Congenital dermal melanocytoses are usually benign and do not require treatment.