TN 16 (03-18)
DI 23022.520 Ullrich Congenital Muscular Dystrophy
ULLRICH CONGENITAL MUSCULAR DYSTROPHY
UCMD; Ullrich Disease; Ullrich Scleroatonic Muscular Dystrophy; Muscular Dystrophy Scleroatonic
Ullrich Congenital Muscular Dystrophy (UCMD) is a rare form of congenital muscular dystrophy that is caused by mutations in the gene coding for the alpha chains of collagen VI (COL6A1, COL6A2, COL6A3), adversely affecting the production of collagen VI, which is needed for normal connective tissue and muscle function. UCMD is present at birth. Children born with UCMD generally have loss of muscle tone (hypotonia), loose joints (hyperextensibility), muscle weakness of the distal muscles (hands and feet), joint contractures, curvature of the spine (kyphosis), a ‘wryneck’ (torticollis), hip dislocation, protruding heelbone (calcaneus), respiratory insufficiency, a round face with drooping of the lower lids, prominent ears (micrognathia) and skin changes (hyperkeratosis). Intelligence and brain activity are normal. Cardiac function is normal.
TESTING, PHYSICAL FINDINGS, AND ICD-9-CM CODING
The diagnosis is supported by abnormal immunoreactivity for collagen VI on muscle biopsies, genetic testing, serum creatine kinase (CK) concentration, and immunostaining of muscle tissue. EMG reveals myopathic changes while the nerve conduction velocity (NCV) is normal.
ICD-9: 359.0 Congenital hereditary muscular dystrophy
ONSET AND PROGRESSION
Children with UCMD experience a progressive loss of ambulation and die of respiratory failure in the first decade of life.
There is currently no cure for UCMD. Callipers (leg splints) are often used to assist a child to walk, and sleep studies are used to monitor the breathing quality during sleep.
SUGGESTED PROGRAMMATIC ASSESSMENT*
Suggested MER for Evaluation: Clinical examination including a description of physical findings, family history, genetic testing, electromyography or nerve conduction tests, and blood and enzyme tests.
Suggested Listings for Evaluation:
* Adjudicators may, at their discretion, use the Medical Evidence of Record or Listings suggested to evaluate the claim. However, the decision to allow or deny the claim rests with the adjudicator.