Chromosome 22 Ring
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Chromosome 22 Ring 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.
Chromosome 22 Ring is a rare disorder characterized by abnormalities of the 22nd chromosome. Associated symptoms and findings may be extremely variable from case to case. However, the disorder is typically associated with moderate to severe mental retardation. Some affected individuals may also have relatively mild, nonspecific physical (i.e., dysplastic) features, whereas others may have more distinctive, potentially severe physical abnormalities. According to reports in the medical literature, common findings include diminished muscle tone (hypotonia) and motor incoordination; an unsteady manner of walking (gait); pronounced verbal delays; and/or certain malformations of the skull and facial (craniofacial) region. Such craniofacial abnormalities may include an unusually small head (microcephaly); vertical skin folds that may cover the eyes' inner corners (epicanthal folds); unusually large ears; and/or other malformations. Chromosome 22 Ring is usually caused by spontaneous or "de novo" errors very early in the development of the embryo that appear to occur randomly for unknown reasons.
March of Dimes Birth Defects Foundation
1275 Mamaroneck Avenue
White Plains, NY 10605
Arc (a national organization on mental retardation)
1010 Wayne Ave
Silver Spring, MD 20910
Chromosome Disorder Outreach, Inc.
P.O. Box 724
Boca Raton, FL 33429-0724
UNIQUE - Rare Chromosome Disorder Support Group
P.O. Box 2189
Surrey, Intl CR3 5GN
Tel: 44 0 1883 330766
Fax: 44 0 1883 330766
Ring Chromosome 22 E-Mail Discussion List
609 West Minnesota Street
St. Joseph, MN 56374
Chromosome 22 Central
237 Kent Ave
Ontario, Intl P4N 3C2
MUMS National Parent-to-Parent Network
150 Custer Court
Green Bay, WI 54301-1243
Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
For a Complete Report
For a Complete Report
This is an abstract of a report from the National Organization for Rare Disorders, Inc. ® (NORD). A copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html