Blaschko's lines refers to lines of:: (A) Melanocyte migration, (B) Ectodermal cell migration, (C) Mesodermal cell migration, (D) Endodermal cell migration
Answer is B. Blaschko's lines are characteristic of mosaic conditions of the epidermis and probably represent the routes of ectodermal cell migration from the neural crest. Ref: Rook's textbook of dermatology, 8th edition, Pg 18.4.