Naevus Acneiformis Unilateralis (Naevus Follicularis Keratosus)

A rare type of nevus was first described by Selhorst¹in 1896 under the title naevus acneiformis unilateralis. The first instance of the condition recognized in the United States was reported by White²in 1914, under the title naevus follicularis keratosus. In the foreign literature similar cases have been recorded occasionally, under descriptive names such as naevus acneiformis (Bettmann³),naevus acnéique unilatéral en bandes et en plaques(Thibierge⁴), systemized sebaceous gland nevus (Mayr⁵), naevus unilateralis comedo-follicularis (Hodara⁶) andnaevus zoniforme à comédones(Montpellier et Colinieu⁷). Others have reported undoubted examples of this nevus, and mention should be made of the cases reported by Aoichi,⁸Meirowsky,⁹Klein,¹⁰Barber¹¹and Anderson.¹² This nevus was thoroughly and ably described by Sweitzer and Winer¹³under the title naevus unilateralis comedonicus in October 1932. About the same time