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Intellectual disability-developmental delay-contractures syndrome is a rare, slowly progressive genetic disorder that is present at birth. It is characterized by contractures of the joints of the feet (arthrogryposis multiplex congenita), muscle degeneration (atrophy), mild intellectual disability and an impaired ability to move certain muscles of the eyes, face and tongue. Other symptoms might include spasticity and seizures. Intellectual disability-developmental delay-contractures syndrome is caused by mutations in the ZC4H2 gene and is inherited in an X-linked recessive fashion. Most people with intellectual disability-developmental delay-contractures syndrome are male; however carrier females have been reported to have mild symptoms. There is no known cure for intellectual disability-developmental delay-contractures syndrome. Treatment is symptomatic and supportive.
Source: GARD Last updated on 05-01-20
Intellectual disability-developmental delay-contractures syndrome syndrome is inherited in an X-linked recessive manner and is caused by mutations in the ZC4H2 gene. A condition is considered X-linked if the gene with the mutation that causes the disorder is located on the X chromosome, one of the two sex chromosomes. In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. In females (who have two X chromosomes), a mutation must be present in both copies of the gene to cause the disorder. As such, males are affected by X-linked recessive disorders much more frequently than females.
In X-linked recessive inheritance, a female with one mutated copy of the gene in each cell is called a carrier. She can pass on the altered gene, but usually does not experience signs and symptoms of the disorder. Rarely, female carriers of a ZC4H2 gene mutation have been reported to exhibit mild symptoms.
Last updated on 05-01-20
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