Xeroderma pigmentosum, type 7: A rare genetic disorder where the enzyme that repairs DNA damage done by UV radiation is defective. It is characterized by sensitivity to sunlight, skin pigmentation and atrophy and actinic skin tumors. The different types of xeroderma pigmentosum vary in the body's ability to repair the damage to DNA done by UV radiation. Type G usually involves severe neurological symptoms.
Excessive freckling * Telangiectases * Keratoma * Papillomas * Skin malignancies
The phrase "signs of Xeroderma pigmentosum, type 7" should, strictly speaking, refer only to those signs and symptoms of Xeroderma pigmentosum, type 7 that are not readily apparent to the patient.