“…Histological studies point to an existing similarity between the Nevus unius lateralis and Congenital Ichthyosiform Erythrodermia [Binzer, 1930; Blaschko [1901] at tached some importance to the relationship of the nevi and the configura tion of whorls in the hairy skin. Kopp [1905] linked their origin to blood and lymph vessels.…”