Dermal melanosis

Dermal melanosis 是扁平的藍色或藍色/灰色斑點,形狀不規則,通常在出生時或出生後不久出現。先天性真皮黑素細胞增多症(以前稱為蒙古藍斑)屬於胎記的一種。

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      References Optimizing Q-switched lasers for melasma and acquired dermal melanoses 30027914
      Q‑switched Nd:YAG 雷射是一種廣為人知的治療皮膚表層與深層色素斑點的方法,通常需要多次治療才能獲得理想效果。已提出使用 low‑energy Q‑switched 1064 nm Nd:YAG 雷射(multi‑pass technique and larger spot size)作為治療黃褐斑的方法。
      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,又稱蒙古斑,是新生兒常見的胎記。它於出生時或出生後不久,在皮膚上呈現灰藍色斑塊。這些標記多出現在下背部和臀部,肩部則是次常見部位。於亞洲及黑人嬰兒中較為常見,男女皆同。通常會在1至6歲自行消退,且大多無害,無需治療。
      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.