Mongolian Spot (hyperpigmented macule)

1. the most common hyperpigmented lesion in the newborn
2. in 90% of AA, asian, hispanic infants
3. often over buttocks, flanks, shoulders
4. gray, blue-green
5. may be mistaken for bruises. document size and location!
6. caused by melanocytes that infiltrate the dermis, tend to fade gradually over 1st 3 years of life, but some may persist into adulthood