NIH Rare Diseases
:
54
Cap myopathy is a disorder that primarily affects skeletal muscles, the muscles that the body uses for movement. People with cap myopathy have muscle weakness (myopathy) and poor muscle tone (hypotonia) throughout the body, but they are most severely affected in the muscles of the face, neck, and limbs. The muscle weakness, which begins at birth or during childhood, can worsen over time. The name cap myopathy comes from characteristic abnormal cap-like structures that can be seen in muscle cells when muscle tissue is viewed under a microscope. The severity of cap myopathy is related to the percentage of muscle cells that have these caps. Individuals in whom 70 to 75 percent of muscle cells have caps typically have severe breathing problems and may not survive childhood, while those in whom 10 to 30 percent of muscle cells have caps have milder symptoms and can live into adulthood. Cap myopathy can be caused by mutations in the in the ACTA1, TPM2, or TPM3 genes. This condition follows an autosomal dominant manner of inheritance, however, most cases are not inherited; they result from new mutations in the gene and occur in people with no history of the disorder in their family.
MalaCards based summary
:
Cap Myopathy, also known as
cap disease, is related to
myopathy and
myopathy, congenital. An important gene associated with Cap Myopathy is
TPM3 (Tropomyosin 3), and among its related pathways/superpathways are
Cardiac muscle contraction and
Dilated cardiomyopathy (DCM). The drugs
Anti-Bacterial Agents and
Antibiotics, Antitubercular have been mentioned in the context of this disorder. Affiliated tissues include
skeletal muscle and
bone, and related phenotypes are
high palate and
reduced tendon reflexes
Genetics Home Reference
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26
Cap myopathy is a disorder that primarily affects skeletal muscles, which are muscles that the body uses for movement. People with cap myopathy have muscle weakness (myopathy) and poor muscle tone (hypotonia) throughout the body, but they are most severely affected in the muscles of the face, neck, and limbs. The muscle weakness, which begins at birth or during childhood, can worsen over time.
