What is (are) Ullrich congenital muscular dystrophy ?
Ullrich congenital muscular dystrophy is a condition that mainly affects skeletal muscles (the muscles used for movement). Affected individuals show severe muscle weakness soon after birth, develop stiff joints (contractures) in their knees and elbows, and may have an unusual range of movement (hypermobility) in their wrists and ankles. This condition is caused by mutations in the COL6A1, COL6A2, and COL6A3 genes. Ullrich congenital muscular dystrophy is typically inherited in an autosomal recessive pattern. In rare cases, this condition may be inherited in an autosomal dominant pattern.