Phakomatosis Pigmentokeratotica, also known as phacomatosis pigmentokeratotica, is related to hypophosphatemia and renal hypoplasia. An important gene associated with Phakomatosis Pigmentokeratotica is HRAS (HRas Proto-Oncogene, GTPase). Affiliated tissues include skin, and related phenotypes are linear nevus sebaceous and nevus spilus