This is a common birthmark in newborns, occasionally confused with bruises and even child abuse.
Description
Mongolian spots are dark, bluish-gray, flat birthmarks which can be rather large. They are collections of skin pigment cells (melanocytes) close to the skin surface. They are harmless and do not predispose the child to skin cancer or any other diseases
Symptoms
Mongolian spots can occur anywhere, but tend to be seen over the buttocks, back, and shoulders. They also are relatively common on the arms and legs. They vary greatly in size and shape. A child may have one spot or several.
Who gets it?
Mongolian spots can occur in any newborn, but are more common in black, Asian, and Hispanic babies. They may occur in up to 90% of these babies.
Is it contagious?
No, it is not.
How long does it last?
They are darkest at birth and fade during the first few years of life. Most fade away by 2 or 3 years of age and are gone completely by age 5. However, they can persist faintly into adulthood.
How is it diagnosed?
They are diagnosed by their characteristic appearance in a newborn baby.
What is the treatment?
No treatment is necessary.
How can it be prevented?
It cannot be prevented.
When to be concerned
Mongolian spots are not a concern, but they can be misdiagnosed. If the spots are enlarging or darkening, then the child should be examined.
