Skin melanocytic tumor
Topics to be merged
Mongolian spot

Topic Completed: 1 November 2014

Minor changes: 4 November 2020

Copyright: 2003-2021,, Inc.

PubMed Search: Mongolian spot

Christopher S. Hale, M.D.
Page views in 2020: 822
Page views in 2021 to date: 611
Cite this page: Hale CS. Mongolian spot. website. Accessed July 24th, 2021.
Definition / general
  • Also known as congenital dermal melanocytosis
  • Related to "dermal melanocytoses" (nevus of Ito, nevus of Ota, Hori nevus)
  • Although melanocytic, is NOT a true nevus
  • Usually sacral region
Case reports
Clinical images

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Mongolian spots

Microscopic (histologic) description
  • Normal at low power
  • High power shows occasional deep dendritic melanocytes, with melanin granules dissecting bundles of dermal collagen
  • No associated melanophages
Differential diagnosis
  • Bruises from child abuse
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