Porokeratosis of Mibelli in a zosteriform distribution occurred in two girls. Although this has been previously described, the true incidence is not known. The diagnosis is most confused with lichen striatus, keratosis follicularis, nevus unius lateris, or other epidermal nevi.
Goldner R. Zosteriform Porokeratosis of Mibelli. Arch Dermatol. 1971;104(4):425-426. doi:10.1001/archderm.1971.04000220083017