Important It is possible that the main title of the report Xeroderma Pigmentosum is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
Kaposi Disease (not Kaposi Sarcoma)
Xeroderma Pigmentosum, Variant Type, XP-V
Xeroderma Pigmentosum, Type A, I, XPA, Classical Form
Xeroderma Pigmentosum, Type B, II, XPB
Xeroderma Pigmentosum, Type C, III, XPC
Xeroderma Pigmentosum, Type D, IV, XPD
Xeroderma Pigmentosum, Type E, V, XPE
Xeroderma Pigmentosum, Type F, VI, XPF
Xeroderma Pigmentosum, Type G, VII, XPG
Xeroderma Pigmentosum, Dominant Type
Xeroderma pigmentosum (XP) is a group of rare inherited skin disorders characterized by a heightened reaction to sunlight (photosensitivity) with skin blistering occurring after exposure to the sun. In some cases, pain and blistering may occur immediately after contact with sunlight. Acute sunburn and persistent redness or inflammation of the skin (erythema) are also early symptoms of XP. In most cases, these symptoms may be apparent immediately after birth or occur within the next three years. In other cases, symptoms may not develop until later in childhood or, more rarely, may not be recognized until adulthood. Other symptoms of XP may include discolorations, weakness and fragility, and/or scarring of the skin.
Xeroderma pigmentosum affects the eyes as well as the skin, has been associated with several forms of skin cancer, and, in some cases, may occur along with dwarfism, mental retardation, and/or delayed development.
Several subtypes of XP (i.e., XP complementation groups) have been identified, based upon different defects in the body's ability to repair DNA damaged by ultraviolet light (UV). According to the medical literature, the symptoms and findings associated with the classic form of xeroderma pigmentosum, known as XP, type A (XPA), may also occur in association with the other XP subtypes. These include: XP, type B (XPB); XP, type C (XPC), XP, type D (XPD); XP, type E (XPE); XP, type F (XPF); and XP, type G (XPG). These XP subtypes are transmitted as an autosomal recessive trait. In addition, another subtype of the disorder, known as XP, dominant type, has autosomal dominant inheritance.
In addition to the XP subtypes discussed above, researchers have identified another form of the disorder known as XP, variant type (XP-V). As with the other XP subtypes, symptoms and findings associated with the classic form of XP may also be seen in individuals with XP-V. XP-V cells have a normal or near normal ability to repair UV-induced DNA damage (nucleotide excisional repair), however, they are defective in replicating UV-damaged DNA during the division and reproduction of cells. Although the disorder's mode of inheritance is unknown, most researchers suspect that XP-V is transmitted as an autosomal recessive trait.
The Arc 1825 K Street NW, Suite 1200 Washington, DC 20006 Tel: (202)534-3700 Fax: (202)534-3731 Tel: (800)433-5255 TDD: (817)277-0553 Email: email@example.com Internet: http://www.thearc.org
Skin Cancer Foundation 149 Madison Avenue Suite 901 New York, NY 10016 Tel: (212)725-5176 Fax: (212)725-5751 Tel: (800)754-6490 Email: firstname.lastname@example.org Internet: http://www.skincancer.org
NIH/National Institute of Arthritis and Musculoskeletal and Skin Diseases Information Clearinghouse One AMS Circle Bethesda, MD 20892-3675 USA Tel: (301)495-4484 Fax: (301)718-6366 Tel: (877)226-4267 TDD: (301)565-2966 Email: NIAMSinfo@mail.nih.gov Internet: http://www.niams.nih.gov/
Xeroderma Pigmentosum Society, Inc. 437 Snydertown Road, 185 S Orange Ave Craryville, NY 12521 Tel: (518)851-2612 Email: email@example.com Internet: http://www.xps.org/
Rare Cancer Alliance 1649 North Pacana Way Green Valley, AZ 85614 USA Internet: http://www.rare-cancer.org
Genetic and Rare Diseases (GARD) Information Center PO Box 8126 Gaithersburg, MD 20898-8126 Tel: (301)251-4925 Fax: (301)251-4911 Tel: (888)205-2311 TDD: (888)205-3223 Internet: http://rarediseases.info.nih.gov/GARD/
Madisons Foundation PO Box 241956 Los Angeles, CA 90024 Tel: (310)264-0826 Fax: (310)264-4766 Email: firstname.lastname@example.org Internet: http://www.madisonsfoundation.org
Cancer.Net American Society of Clinical Oncology 2318 Mill Road Suite 800 Alexandria, VA 22314 Tel: (571)483-1780 Fax: (571)366-9537 Tel: (888)651-3038 Email: email@example.com Internet: http://www.cancer.net/
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