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Congenital giant pigmented nevus; Giant hairy nevus; Giant pigmented nevus; Bathing trunk nevus; Congenital melanocytic nevus - large
A congenital pigmented or melanocytic nevus is a dark-colored, often hairy patch of skin that is present at birth.
A giant congenital nevus is smaller in infants and children, but it usually continues to grow with the child. A giant pigmented nevus is larger than 8 inches once it stops growing.
Bathing trunk nevi are thought to be caused by defects or problems that occur as a baby grows in the womb. However, in some families bathing trunk nevi may be inherited.
A bathing trunk nevus may occur with:
Smaller congenital pigmented or melanocytic nevi are common in children and lead to fewer complications. Larger or giant nevi are fairly rare.
Bett BJ. Large or multiple congenital melanocytic nevi: Occurence of neurocutaneous melanocytosis in 1008 persons. J Am Acad Dermatol. 2006 May;54(5):767-777.
Congenital melanocytic nevi. In: Habif TP, ed. Clinical Dermatology. 5th ed. Philadelphia, Pa: Saunders Elsevier; 2009:pp 850-851.
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