<unk>  (also known as "Linear<unk>  hyperpigmentation," "Progressive cribriform and zosteriform hyperpigmentation," "Reticulate and zosteriform hyperpigmentation," "Reticulate hyperpigmentation of Iijima and Naito and Uyeno," "Zebra-like hyperpigmentation in whorls and streaks," and "Zebra-line hyperpigmentation") is a disorder of pigmentation that develops within a few weeks of birth and progresses for one to two years before stabilizing. There is linear and<unk>  hyperpigmentation following the lines of Blaschko without preceding bullae or verrucous lesions. It is important to exclude other pigmentary disorders following the Blaschko lines before making a diagnosis of<unk> . The differential diagnoses include incontinentia pigmenti, linear epidermal nevus, hypomelanosis of Ito and Goltz syndrome. Recently, a case of<unk>  was reported in a Malaysian Chinese girl.
Linear and whorled nevoid hypermelanosis
Porokeratotic eccrine ostial and dermal duct nevus
Zosteriform speckled lentiginous nevus
Erythromelanosis follicularis faciei et colli
Linear verrucous epidermal nevus
Pigmented spindle cell nevus
Inflammatory linear verrucous epidermal nevus
Eccrine nevus