Rare pigmentary atrophic autosomal recessive disease manifested as an extreme photosensitivity to ultraviolet light as the result of a deficiency in the enzyme that permits excisional repair of utraviolet damaged dna.

Xeroderma pigmentosum (XP) is a genetic disorder in which there is a decreased ability to repair DNA damage such as that caused by ultraviolet (UV) light. Symptoms may include a severe sunburn after only a few minutes in the sun, freckling in sun-exposed areas, dry skin and changes in skin pigmentation...