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Chromosome Disorders

Chromosomes hold the genetic keys to all of the body's functions. There may be errors on any of the body's 23 pairs of chromosomes, such as broken or missing pieces or too many pieces or copies. Links below are grouped by chromosome number (1-22 and sex chromosomes).

Wolf-Hirschhorn Syndrome (Chromosome 4)
Article describes Wolf-Hirschhorn syndrome, its symptoms, diagnosis, and treatment.

Cri-du-chat Syndrome (Chromosome 5)
Article describes cri-du-chat syndrome, its symptoms, diagnosis, and treatment. From the About.com Guide to Rare/Orphan Diseases.

Chromosome 9p Network
Provides information, guest book, news, and links.

Distal Trisomy 10q Families
Offers information, a registry, and links.

The Fragile Web Site (Jacobsen Syndrome, 11q minus)
Provides information on Chromosome 11 abnormalities, especially Jacobsen syndrome (11q minus).

Patau Syndrome (Trisomy 13)
Article describes Patau syndrome (Trisomy 13), its symptoms, diagnosis, and treatment.

Angelman Syndrome (Chromosome 15)
Article describes Angelman syndrome, its symptoms, diagnosis, and treatment.

Prader-Willi Syndrome (Chromosome 15)
Article describes Prader-Willi syndrome, its symptoms, diagnosis, and treatment.

IsoDicentric 15 Exchange, Advocacy, and Support (IDEAS)
Information, FAQs, photo gallery, support, and newsletters.

Chromosome 16 Disorders
Article describes some of the disorders of chromosome 16, such as trisomy 16, and lists their symptoms.

Smith-Magenis Syndrome (Chromosome 17)
Information, resources, and support for Smith-Magenis syndrome from Parents and Researchers Interested in Smith-Magenis Syndrome (PRISMS).

Edwards Syndrome (Trisomy 18)
Article describes Edwards syndrome (Trisomy 18), its symptoms, diagnosis, and treatment.

Chromosome 18 Registry & Research Society
Offers education, research, support, and a newsletter.

Down Syndrome (Trisomy 21)
The About.com Guide to Down Syndrome answers some of the common questions about this inherited disorder.

Cat Eye Syndrome (Chromosome 22)
Information about the genetic birth defect called cat eye syndrome, including its symptoms, diagnosis, and treatment.

Chromosome 22 Central
Comprehensive site, offering news, information, links, chat, message boards, guest book, and research.

Fragile X Syndrome
Article describes Fragile X syndrome, its symptoms, diagnosis, and treatment.

Klinefelter's Syndrome and Breast Cancer
Article examines the XXY male disorder, it symptoms, diagnosis, and treatment, and why these males are 20 to 50 times more likely to develop breast cancer than the average male. From the About.com Guide to Rare/Orphan Diseases.

Turner Syndrome
Article describes the disorder, its symptoms, diagnosis, and treatment. From the About.com Guide to Rare/Orphan Diseases.

Sex Chromosome Variations: About 47XXY
Information from Klinefelter Syndrome and Associates organization.

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