Incontinentia pigmenti (IP) is an X-linked dominant genodermatosis mostly affecting females. Cutaneous manifestations are present along the lines of Blaschko and are subdivided into four stages: vesicular, verrucous, hyperpigmented, and atrophic. Other tissues of ectodermal origin are also affected, showing hair abnormalities, dental anomalies, and ophthalmologic and neurologic alterations. Familial incontinentia pigmenti is caused by mutations in the NEMO gene.
