Xeroderma pigmentosum (XP) is a rare genetic condition affecting DNA repair. People with xeroderma pigmentosum are extremely sensitive to ultraviolet (UV) rays like those from the sun. XP can ...

The policy, which has not yet included dermatological disorders, is being reviewed to incorporate three specific conditions: epidermolysis bullosa (EB), xeroderma pigmentosa (XP), and ichthyosis.