Histology of InflammatoryLinearVerrucous Epidermal Naevus
In ILVEN, sections show skin with psoriasiform epidermal hyperplasia with alternating orthokeratosis and parakeratosis (figure 1). The orthokeratotic areas overlie depressed epidermis with marked hypergranulosis (figure 2). The zones of parakeratosis overlie hypogranulosis (figure 3). There are spongiotic epidermal changes and small microvesicles. There is a mixed dermalinflammatory response (figure 4).