II. Definitions

  1. Mongolian Spot (Dermal Melanosis, Dermal Melanocytosis)
    1. Benign pigmented Birthmarks typically in black, native american, asian and hispanic children

III. 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%

IV. Pathophysiology

  1. Melanocytes that are trapped deep with the skin

V. Signs

  1. Bluish-gray, bluish-black or brown Macules or patches
  2. Distribution
    1. Lumbosacral and buttock regions

VI. Course

  1. Most lesions fade by age 2 years
    1. 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 Nonaccidental Trauma

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