| A form of congenital muscular dystrophy characterized by congenital weakness, hypotonia, proximal joint contractures, marked hyperlaxity of the distal joints, attainment of independent ambulation which is subsequently lost and uniform respiratory insufficiency during the teenage years. Intermediate COL6-RD is caused by heterozygous or biallelic pathogenic variants (PVs) in the genes coding for the alpha chains of the extracellular matrix protein collagen VI (COL6A1, COL6A2, and COL6A3). |
