Congenital Nevus

• Figure 2.8 A: Congenital nevus B: Spitz nevus (Reprint from Laxer RM, ed. The Hospital for Sick Children: Atlas of Pediatrics. Philadelphia, PA: Current Medicine; 2005) C: Nevus spilus (Courtesy of Dr. Paul Getz)

  Onset at birth or first year typically; 1–2% of population
• Categorized as small (<1.5 cm), medium (1.5–20 cm), and large (>20 cm or 10% BSA)
• Slight ↑ risk of melanoma (highest in large CNs); 3–12% of giant (large) CNs may develop melanoma (different studies show varying percentages); axial nevi with greatest risk
• If large nevus over scalp, rule out neurocutaneous melanosis with MRI