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Cri du chat syndrome is a rare genetic disorder due to a partial chromosome deletion on chromosome 5. [1] Its name is a French term ("cat-cry" or "call of the cat") referring to the characteristic cat-like cry of affected children. [2] It was first described by Jérôme Lejeune in 1963. [3]
The chromosomal basis of Cri du chat syndrome consists of a deletion of the most terminal portion of the short arm of chromosome 5. 5p deletions, whether terminal or interstitial, occur at different breakpoints; the chromosomal basis generally consists of a deletion on the short arm of chromosome 5.
Cri du chat syndrome: 5 D Cystic fibrosis: 7q P DiGeorge syndrome: 22q D Down syndrome: 21 C Duchenne muscular dystrophy: Xp D Familial hypercholesterolemia: 19 P Haemochromatosis type 1: 6 P Hemophilia: X P Klinefelter syndrome: X C Neurofibromatosis: 17q/22q/? Phenylketonuria: 12q P Polycystic kidney disease: 16 or 4 P Prader–Willi syndrome ...
Karyotype of a human with Trisomy 21 (Down syndrome). Trisomies can occur with any chromosome, but often result in miscarriage rather than live birth.For example, Trisomy 16 is most common in human pregnancies, occurring in more than 1%, but the only surviving embryos are those having some normal cells in addition to the trisomic cells (mosaic trisomy 16). [3]
Full trisomy 9 is a rare and fatal chromosomal disorder caused by having three copies of chromosome number 9.It can be a viable condition if the trisomic component affects only part of the cells of the body or in cases of partial trisomy of the short arm (trisomy 9p) in which cells have a normal set of two entire chromosomes 9 plus part of a third copy of the short arm ("p") of the chromosome.
Deletion of this area of chromosome 5 is associated with intellectual disability, psychotic behavior, autism, macrocephaly and hypernasal-like speech, as well as the disorder Cri du chat syndrome. [25] [39] Fryns (2006) suggests a detailed examination of chromosome 5 with FISH should be performed as part of the differential diagnosis of LFS. [9]
What is the life expectancy for patients with Lejeune’s syndrome? -ErinHowarth 00:17, 26 November 2009 (UTC) The above question was probably asked because of the reference in the [Telomerase reverse transcriptase] article. Telomerase is of course essential for embryonic growth and the maintenance of stem cells.
XYY syndrome, also known as Jacobs syndrome, is an aneuploid genetic condition in which a male has an extra Y chromosome. [1] There are usually few symptoms. [ 2 ] These may include being taller than average and an increased risk of learning disabilities .