Postzygotic NRAS Variants and Subsequent Copy-Neutral Loss of Heterozygosity Underlie Speckled-Pattern Formation in Nevus Spilus-Type Congenital Melanocytic Nevus.
Nevus spilus-type congenital melanocytic nevus (NS-CMN) is characterized by a background brown macule with superimposed black macules or plaques; however, the mechanism underlying speckled-pattern formation in human skin remains unclear. We performed clinicopathological and molecular analyses of three NS-CMN cases usin...