The Mongolian spot (MS) is a congenital macula of blue-gray
colour usually located on the sacrococcygeal region, but may have atypical
locations such as the back and more rarely the limbs. The authors describe a case of an infant male, born from a monitored pregnancy without complications, whose skin objective examination showed a Mongolian spot
occupying the entire lower back region and lower limbs with many similar spots
of different sizes and locations as well as on the back of the right hand.
Further physical examination appeared to be normal.
The knowledge
of normal variants is crucial in clinical practice of the family doctor,
particularly in child health consultation. This atypical skin colouration arises with relative frequency in our population and although it does not seem strange in the usual location, the appearance in atypical locations can be a
sign of other associated pathologies, and if they had not been observed at
birth, they can be an alert for eventual child abuse.
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