Tetrasomy 9p

See also: Trisomy 9
Tetrasomy 9p
Other namesIsochromosome 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]

  1. ^ a b "Tetrasomy 9p" (PDF). rarechromo.org. Unique: Rare Chromosome Disorder Support Group. Retrieved November 29, 2015.
  2. ^ "Chromosome 9, Tetrasomy 9p". National Organization for Rare Disorders. Retrieved 2015-11-29.