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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 is the result of a chromosome abnormalityâa deleted piece of chromosomal material on chromosome 5. In about 80% of patients, the defective chromosome comes from the father. In 90% of patients with cri du chat syndrome, the deletion is sporadic. This means that it happens randomly and is not hereditary.