II. Definition

  1. Benign pigmented Birthmarks typically in black, native american, asian and hispanic children

III. Pathophysiology

  1. Melanocytes that are trapped deep with the skin

IV. Epidemiology: Ethnic breakdown

  1. Black infants: 96%
  2. Native americans infants: 90%
  3. Asian infants: 81-90%
  4. Hispanic infants: 46-70%
  5. White infants: 10%

V. Signs

  1. Bluish-gray, bluish-black or brown Macules or patches
  2. Distribution: Especially lumbosacral and buttock areas

VI. Course

  1. Most lesions fade by age 2 and often disappear completely between age 7 to 13 years
  2. Some areas may persist

VII. Management

  1. No interventions needed
  2. Document presence of Mongolian Spots to avoid misdiagnosis of Bruising from abuse

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