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Cri-du-chat syndrome: Rare Disease Status. Cri-du-chat syndrome is listed as a rare disease by the Office of Rare Diseases (ORD)...more Â» Cri-du-chat syndrome: Rare Disease Status. Cri-du-chat syndrome is listed as a rare disease by Ophanet, a consortium of European partners ...more Â» About statistics: This page presents a variety of statistics about Cri-du-chat syndrome.
Cri du chat syndrome, also known as chromosome 5p deletion syndrome, 5pâ syndrome or Lejeuneâs syndrome, is a rare genetic disorder due to chromosome deletion on chromosome 5. Its name is a French term referring to the characteristic cat-like cry of affected children. It was first described by JÃ©rÃ´me Lejeune in 1963. The condition affects an estimated 1 in 50,000 live births across all ethnicities and is more common in females by a 4:3 ratio.