Presence of four copies of the short arm of chromosome 9
See also: Trisomy 9
Medical condition
Tetrasomy 9p
Other names
Isochromosome 9p
Chromosome 9, the chromosome involved in this condition
Tetrasomy 9p (also known tetrasomy 9p syndrome) is a rare chromosomal disorder characterized by the presence of two extra copies of the short arm of chromosome 9 (called the p arm), in addition to the usual two.[1] Symptoms of tetrasomy 9p vary widely among affected individuals but typically include varying degrees of delayed growth, abnormal facial features and intellectual disability.[1] Symptoms of the disorder are comparable to those of trisomy 9p.[2]
^ ab"Tetrasomy 9p" (PDF). rarechromo.org. Unique: Rare Chromosome Disorder Support Group. Retrieved November 29, 2015.
^"Chromosome 9, Tetrasomy 9p". National Organization for Rare Disorders. Retrieved 2015-11-29.
Tetrasomy9p (also known tetrasomy9p syndrome) is a rare chromosomal disorder characterized by the presence of two extra copies of the short arm of chromosome...
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Progress M1-9 9p, an arm of Chromosome 9 (human) 9P/Tempel; see Tempel 1 Monosomy 9p, a chromosomal disorder due to deletion Tetrasomy9p, a genetic disease...
trisomy 9p; they have birth defects similar to, but less severe than, those in tetrasomy9p. The genetic material in tetrasomy 9 and trisomy 9p that causes...
sample since 9p is found in high concentrations in the blood. Ultrasound is another tool that may be utilized to identify tetrasomy9p in infants prior...
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