Mongolian spot

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A large, flat birthmark that can range in color from deep brown to slate gray or blue-black.

Description

A Mongolian spot is now more commonly called a slate gray nevus. It’s a large, flat birthmark that may be mistaken for a bruise. The color can range from deep brown to slate gray or blue-black. It’s more common in Black, Native American, Hispanic and Asian babies than in white babies. It’s also called congenital dermal melanocytosis.

Overview

This birthmark usually shows up on the lower back, buttocks or shoulders.

Symptoms

This type of birthmark tends to fade during early childhood and needs no treatment.

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