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Disease Profile

X-linked dominant scapuloperoneal myopathy

Prevalence estimates on Rare Medical Network websites are calculated based on data available from numerous sources, including US and European government statistics, the NIH, Orphanet, and published epidemiologic studies. Rare disease population data is recognized to be highly variable, and based on a wide variety of source data and methodologies, so the prevalence data on this site should be assumed to be estimated and cannot be considered to be absolutely correct.


US Estimated

Europe Estimated

Age of onset





Autosomal dominant A pathogenic variant in only one gene copy in each cell is sufficient to cause an autosomal dominant disease.


Autosomal recessive Pathogenic variants in both copies of each gene of the chromosome are needed to cause an autosomal recessive disease and observe the mutant phenotype.


dominant X-linked dominant inheritance, sometimes referred to as X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome.


recessive Pathogenic variants in both copies of a gene on the X chromosome cause an X-linked recessive disorder.


Mitochondrial or multigenic Mitochondrial genetic disorders can be caused by changes (mutations) in either the mitochondrial DNA or nuclear DNA that lead to dysfunction of the mitochondria and inadequate production of energy.


Multigenic or multifactor Inheritance involving many factors, of which at least one is genetic but none is of overwhelming importance, as in the causation of a disease by multiple genetic and environmental factors.


Not applicable


Other names (AKA)

Scapuloperoneal myopathy, X-linked dominant; Scapuloperoneal myopathy, FHL1-related; SPM;


Musculoskeletal Diseases


X-linked scapuloperoneal myopathy is an inherited muscular dystrophy characterized by weakness and wasting of the muscles in the lower legs and the area of the shoulder blades. In some individuals, facial muscles may also be affected. While the progression varies from case to case, it tends to be relatively slow.[1][2] Some cases of scapuloperoneal myopathy are caused by mutations in the FHL1 gene. These cases are inherited in an X-linked dominant manner.[3] Treatment is symptomatic and supportive.[1]


This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Medical Terms Other Names
Learn More:
Percent of people who have these symptoms is not available through HPO
Adult onset
Symptoms begin in adulthood
Abnormal heart rate
Heart rhythm disorders
Irregular heart beat
Irregular heartbeat

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Elevated serum creatine kinase
Elevated blood creatine phosphokinase
Elevated circulating creatine phosphokinase
Elevated creatine kinase
Elevated serum CPK
Elevated serum creatine phosphokinase
High serum creatine kinase
Increased CPK
Increased creatine kinase
Increased creatine phosphokinase
Increased serum CK
Increased serum creatine kinase
Increased serum creatine phosphokinase

[ more ]

Flexion contracture
Flexed joint that cannot be straightened
Foot dorsiflexor weakness
Foot drop
Decreased reflex response
Decreased reflexes

[ more ]

Lower limb muscle weakness
Lower extremity weakness
Lower limb weakness
Muscle weakness in lower limbs

[ more ]

Myofibrillar myopathy
Muscle tissue disease
Proximal muscle weakness
Weakness in muscles of upper arms and upper legs
Scapular winging
Winged shoulder blade
Scapuloperoneal myopathy
Skeletal muscle atrophy
Muscle degeneration
Muscle wasting

[ more ]

Steppage gait
High stepping
Waddling gait
'Waddling' gait
Waddling walk

[ more ]

X-linked dominant inheritance


X-linked dominant scapuloperoneal myopathy is caused by mutations in the FHL1 gene. The FHL1 gene is located on chromosome Xq26. This gene may be involved in muscle development or hypertrophy.[4]


Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.

Testing Resources

  • The Genetic Testing Registry (GTR) provides information about the genetic tests for this condition. The intended audience for the GTR is health care providers and researchers. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.


There is no standard course of treatment for scapuloperoneal myopathy. Some patients may benefit from physical therapy or other therapeutic exercises.[1]

Learn more

These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

Where to Start

  • The Muscular Dystrophy Association has developed a resource called "Facts About Myopathies" that discusses commonly asked questions regarding myopathies. Click on the link above to view this information page.

In-Depth Information

  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss X-linked dominant scapuloperoneal myopathy. Click on the link to view a sample search on this topic.


  1. Scapuloperoneal myopathy. National Organization for Rare Disorders (NORD). 2007; https://www.rarediseases.org/rare-disease-information/rare-diseases/byID/436/viewAbstract. Accessed 8/9/2012.
  2. Scapuloperoneal myopathy, MYH7-related. Online Mendelian Inheritance in Man (OMIM). 2008; https://omim.org/entry/181430. Accessed 8/9/2012.
  3. Scapuloperoneal myopathy, X-linked dominant. Online Mendelian Inheritance in Man (OMIM). 2010; https://omim.org/entry/300695. Accessed 8/9/2012.
  4. FLH1. Genetics Home Reference (GHR). 2012; https://ghr.nlm.nih.gov/gene/FHL1. Accessed 8/9/2012.

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