Definition:

Sarcoglycanopathies are a group of a four genetically closely related muscular dystrophies with a phenotype often similar to the X-linked Duchenne muscular dystrophy [DS:H00562]. It has been demonstrated that pathological mutations of the alpha-sarcoglycan (SG), beta-SG, gamma-SG, and delta-SG genes cause autosomal recessive muscular dystrophies. Clinical presentation of sarcoglycanopathies is characterized by a slowly progressive proximal muscle weakness, leading to loss of ambulation during adolescence in most patients.