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Diseases

Genetic and Rare Diseases Information Center (GARD)

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Becker muscular dystrophy


Other Names for this Disease

  • Becker's muscular dystrophy
  • Benign pseudohypertrophic muscular dystrophy
  • Muscular dystrophy pseudohypertrophic progressive, Becker type
  • Muscular dystrophy, Becker type
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Symptoms

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What are the signs and symptoms of Becker muscular dystrophy?

The symptoms of Becker muscular dystrophy (BMD) may begin anywhere from childhood to a person's early 20s.[1][2] Muscle weakness often affects the legs and pelvis, and slowly gets worse.[1] Over time, affected people begin to have difficulty walking, frequent falls, difficulty with muscle skills (such as running, hopping, and jumping), and loss of muscle mass.[3] Eventually, affected people require a wheelchair.[2] The condition also affects the heart muscles, causing dilated cardiomyopathy. This form of heart disease enlarges and weakens the heart muscle, preventing it from pumping blood efficiently. Dilated cardiomyopathy progresses rapidly and is life-threatening in many cases.[1] Other symptoms of BMD may include cognitive problems, fatigue, loss of balance and coordination, problems breathing, and muscle weakness in the arms, neck and other areas.[3]
Last updated: 3/5/2014

The Human Phenotype Ontology provides the following list of signs and symptoms for Becker muscular dystrophy. If the information is available, the table below includes how often the symptom is seen in people with this condition. You can use the MedlinePlus Medical Dictionary to look up the definitions for these medical terms.

Signs and Symptoms Approximate number of patients (when available)
Amyotrophy 90%
EMG abnormality 90%
Gait disturbance 90%
Myopathy 90%
Hyperlordosis 50%
Hypertrophic cardiomyopathy 50%
Limitation of joint mobility 50%
Reduced bone mineral density 50%
Scoliosis 50%
Slender long bone 50%
Cognitive impairment 7.5%
Developmental regression 7.5%
Adult onset -
Arrhythmia -
Calf muscle pseudohypertrophy -
Cardiomyopathy -
Elevated serum creatine phosphokinase -
Hyporeflexia -
Muscle weakness -
Myalgia -
X-linked recessive inheritance -

Last updated: 11/3/2014

The Human Phenotype Ontology (HPO) has collected information on how often a sign or symptom occurs in a condition. Much of this information comes from Orphanet, a European rare disease database. The frequency of a sign or symptom is usually listed as a rough estimate of the percentage of patients who have that feature.

The frequency may also be listed as a fraction. The first number of the fraction is how many people had the symptom, and the second number is the total number of people who were examined in one study. For example, a frequency of 25/25 means that in a study of 25 people all patients were found to have that symptom. Because these frequencies are based on a specific study, the fractions may be different if another group of patients are examined.

Sometimes, no information on frequency is available. In these cases, the sign or symptom may be rare or common.


References
  1. Duchenne and Becker muscular dystrophy. Genetics Home Reference (GHR). 2007; http://www.ghr.nlm.nih.gov/condition=duchenneandbeckermusculardystrophy. Accessed 11/18/2009.
  2. Muscular Dystrophy, Becker. National Organization for Rare Disorders (NORD). 2007; http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Muscular%20Dystrophy%2C%20Becker. Accessed 11/18/2009.
  3. Kaneshiro NK, Hoch DB. Becker's muscular dystrophy. MedlinePlus. 2008; http://www.nlm.nih.gov/medlineplus/ency/article/000706.htm. Accessed 11/18/2009.


Other Names for this Disease
  • Becker's muscular dystrophy
  • Benign pseudohypertrophic muscular dystrophy
  • Muscular dystrophy pseudohypertrophic progressive, Becker type
  • Muscular dystrophy, Becker type
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.