Congenital Fiber Type Disproportion

Congenital myopathy with fiber type disproportion


Type of disease: Rare conditions

Congenital fiber type disproportion is a type of congenital myopathy. Congenital myopathy refers to a group of muscle disorders that appear at birth or in infancy. Early signs and symptoms of congenital fiber type disproportion include floppiness, limb and facial weakness, and breathing problems. It is a genetic disease caused by mutations in the ACTA1, SEPN1RYR1 or TPM3 genes. Depending on the gene and mutation involved, congenital fiber type disproportion can be passed through families in an autosomal recessive, autosomal dominant, or X-linked manner. Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.

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