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Congenital nevi (CN) are benign melanocytic proliferations presenting at birth or soon after and can evolve and progress over time. CN are subdivided based on their size into small lesions (<1.5 cm), medium (1.5–19.9 cm) and large (≥20cm) [1, 2]. The majority of lesions fall into the small or medium categories. The incidence of large CN is approximately 1 in 20,000 people .