Question: individuals with the disorder xeroderma pigmentosum are hypersensitive to sunlight?
Answer: Xeroderma pigmentosum (XP) is a very rare skin disorder where a person is highly sensitive to sunlight, has premature skin ageing and is prone to developing skin cancers. Xeroderma pigmentosum is caused by cellular hypersensitivity to ultraviolet (UV) radiation, as a result of a defect in the DNA repair system.