A benign, flat, congenital birthmark, with wavy borders and an irregular shape. The colour is caused by melanocytes, melanin-containing cells, that are usually located in the surface of the skin (the epidermis), but are in the deeper region (the dermis) in the location of the spot.
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Synonyms:
blue sacral spot; congenital dermal melanocytosis; Mongolian macula
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MedGen: MeSH: OMIM: MSeqDR : Genes:
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Disease Causing ClinVar Variants
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