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Congenital melanocytic naevus

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Congenital melanocytic naevi are circumscribed areas of skin pigmentation present at birth as a result of abnormal intrauterine proliferation of melanocytes within the dermis, the epidermis or both. They may range in size from a few millimetres to many centimetres in diameter. If their projected or final adult maximal diameter is greater than 20 cm they are termed giant congenital melanocytic naevi.

sections/codes in this section (2F20.2-2F20.2)

• Giant congenital melanocytic naevus  (2F20.20)
• Other specified congenital melanocytic naevus  (2F20.2Y)
• Congenital melanocytic naevus, unspecified  (2F20.2Z)

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