it is suggested that the melanocytic series is characterized by a differentiation pathway ( mdp ) that has four discrete stages during normal development and in postnatal tissue maintenance -- nerve sheath precursor ( nsp ) , dermal migratory , junctional migratory , and dendritic -- and that congenital melanocytic nevi ( cmn ) derive from cells in the nsp stage of the mdp .
C0007589
differentiation
C0007634
cells