Chromosome 18p tetrasomy
Other Names for this Disease
- Tetrasomy 18p
- Tetrasomy chromosome 18p
- Isochromosome 18p
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 The symptoms of tetrasomy 18p vary from case to case but may include craniofacial abnormalities; malformations of the spine, hands, or feet; neuromuscular abnormalities; kidney malformations; moderate to severe mental retardation; limitations in speech; and/or behavioral abnormalities. In most cases, tetrasomy 18p is the result of a spontaneous (de novo) genetic change (mutation) early in embryonic development that occurs for unknown reasons (sporadic).Tetrasomy 18p is a chromosomal disorder in which the short arm of the 18th chromosome (18p) appears four times (tetrasomy) rather than the normal two times in cells of the body.
Last updated: 3/13/2009
- Chromosome 18, Tetrasomy 18p. National Organization for Rare Disorders (NORD). 2001; http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Chromosome%2018%2C%20Tetrasomy%2018p. Accessed 3/13/2009.
- Tetrasomy 18p. Chromosome 18 Registry and Research Society. 2008; http://www.chromosome18.org/Conditions/Tetrasomy18p/tabid/129/Default.aspx. Accessed 3/13/2009.
- The Chromosome 18 Registry & Research Society is an advocacy organization composed of parents of individuals with chromosome 18 abnormalities. Click on the link above to view their information page on tetrasomy 18p.
- Genetics Home Reference (GHR) contains information on Chromosome 18p tetrasomy. This website is maintained by the National Library of Medicine.
- The National Organization for Rare Disorders (NORD) is a federation of more than 130 nonprofit voluntary health organizations serving people with rare disorders. Click on the link to view information on this topic.
- The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
- Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
- PubMed is a searchable database of medical literature and lists journal articles that discuss Chromosome 18p tetrasomy. Click on the link to view a sample search on this topic.