Ullrich congenital muscular dystrophy Overview Ullrich congenital muscular dystrophy (UCMD) is characterized by early-onset, generalized and slowly progressive muscle weakness, multiple proximal joint contractures, marked hypermobility of the distal joints and normal intelligence. Symptoms of Ullrich congenital muscular dystrophy The first signs of UCMD may be seen at birth or are usually evident within the first year of life. These include poor head control and delays in reaching motor milestones such as sitting unaided, crawling, or walking. Failure to gain weight and grow at the expected rate are also often early symptoms. The severity of symptoms at onset and progression varies amongst those affected and depends on the specific change in the COL6 genes. Initial symptoms could be subtle and go unnoticed, and the diagnosis may not be made until infancy or childhood. Muscle weakness Muscle weakness is often noticeable soon after birth. Various muscle groups are affected, including the...