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- X-linked spinal muscular atrophy type 2 (SMAX2, XLSMA), also known as arthrogryposis multiplex congenita X-linked type 1 (AMCX1), is a rare neurological disorder involving death of motor neurons in the anterior horn of spinal cord resulting in generalised muscle wasting (atrophy). The disease is caused by a mutation in UBA1 gene and is passed in an X-linked recessive manner by carrier mothers to affected sons. Affected babies have general muscle weakness, weak cry and floppy limbs; consequently, the condition is usually apparent at or even before birth. Symptoms resemble the more severe forms of the more common spinal muscular atrophy (SMA); however, SMAX2 is caused by a different genetic defect and only genetic testing can correctly identify the disease. The disorder is usually fatal in infancy or early childhood due to progressive respiratory failure, although survival into teenage years has been reported. As with many genetic disorders, there is no known cure to SMAX2. Appropriate palliative care may be able to increase quality of life and extend lifespan. (en)
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- 15125 (xsd:nonNegativeInteger)
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- This condition is inherited in an X-linked recessive manner (en)
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- 535380.0 (dbd:nicaraguanCórdoba)
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- X-linked spinal muscular atrophy type 2 (en)
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- Spinal muscular atrophy with arthrogryposis (en)
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- X-linked spinal muscular atrophy type 2 (SMAX2, XLSMA), also known as arthrogryposis multiplex congenita X-linked type 1 (AMCX1), is a rare neurological disorder involving death of motor neurons in the anterior horn of spinal cord resulting in generalised muscle wasting (atrophy). The disease is caused by a mutation in UBA1 gene and is passed in an X-linked recessive manner by carrier mothers to affected sons. (en)
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- X-linked spinal muscular atrophy type 2 (en)
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- X-linked spinal muscular atrophy type 2 (en)
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