Blaschkolinear acquired inflammatory skin eruption, or blaschkitis, with features of lichen nitidus.

Blaschkolinear acquired inflammatory skin eruption (BLAISE) encompasses a variety of skin conditions in children and adults that show striking distribution along the lines of Blaschko and are characterized histopathologically by an inflammatory infiltrate. The most common presentations of BLAISE are blaschkitis, which affects adults, typically along multiple lines of Blaschko on the trunk, and lichen striatus, which is more commonly seen as a linear dermatosis on the extremities of children. More rarely, dermatoses such as lichen nitidus, illustrated by our patient, can also fit within this spectrum.