Skin-melanocytic tumor
Mongolian spot

Author: Christopher Hale, M.D. (see Authors page)

Revised: 20 February 2017, last major update November 2014

Copyright: (c) 2003-2017,, Inc.

PubMed Search: Mongolian spot
Cite this page: Mongolian spot. website. Accessed October 18th, 2018.
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

Images hosted on other servers:
Missing Image

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