NCIt definition : Intraepithelial neoplasia of the penis that is not caused by human papillomavirus
infection. It usually presents as a solitary white or pink macule or plaque that may
be slightly elevated. A background of long-standing lichen sclerosus is often present.
It is characterized by a thickened epithelium, subtle abnormal cellular maturation,
and atypical basal layer cells. Parakeratosis is common. (WHO 2016);