The plaques can be slightly warty (psoriaform) or scaly (eczema-like). ILVEN is caused by somatic mutations that result in genetic mosaicism. [en.wikipedia.org]

[…] verrucous epidermal nevus Other names ILVEN Verrucous linear plaque following the lines of Blaschko over the right upper arm of a young girl Inflammatory Linear Verrucous Epidermal Nevus is a rare disease of the skin that presents as multiple, discrete, red papules [en.wikipedia.org]

[…] head of the Department of Psychiatry at the University of Kiel. [1] In 1957, he described a case of sebaceous nevus involving the head, with ipsilateral ocular lesions including coloboma of the upper lid, increased density of cranial bones, epileptic seizures [emedicine.medscape.com]