National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

Amish Nemaline Myopathy



Other Names:
Amish Nemaline Myopathy; ANM; NEM5; Amish Nemaline Myopathy; ANM; NEM5; Nemaline Myopathy, Amish Type; Nemaline myopathy, caused by mutation in the troponin t1 gene; Nemaline myopathy 5, Amish type See More
Categories:
This disease is grouped under:

The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
orphanet

Orpha Number: 98902

Definition
A type of nemaline myopathy (NM) only observed in several families of the Amish community.

Clinical description
It has a neonatal onset and patients present with hypotonia associated to contractures, a severe pectus carinatum, and tremor that subsides after 2-3 months of age.

Etiology
TNNT1 (19q13.4) is the causative gene of the Amish NM.

Genetic counseling
Transmission follows an autosomal recessive pattern.

Prognosis
Life expectancy rarely exceeds 2 years as a consequence of severe respiratory insufficiency.

Visit the Orphanet disease page for more resources.
Last updated: 10/1/2010

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.

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Medical Terms Other Names
Learn More:
HPO ID
30%-79% of people have these symptoms
EMG: myopathic abnormalities 0003458
Hip contracture 0003273
Motor delay 0001270
Neonatal hypotonia
Low muscle tone, in neonatal onset
0001319
Pectus carinatum
Pigeon chest
0000768
Progressive muscle weakness 0003323
Proximal amyotrophy
Wasting of muscles near the body
0007126
Shoulder flexion contracture 0003044
Tremor 0001337
Type 1 muscle fiber predominance 0003803
5%-29% of people have these symptoms
Respiratory insufficiency due to muscle weakness
Decreased lung function due to weak breathing muscles
0002747
Percent of people who have these symptoms is not available through HPO
Abnormality of the rib cage 0001547
Autosomal recessive inheritance 0000007
Decreased hip abduction 0003184
Delayed gross motor development
Delayed motor skills
0002194
Infantile onset
Onset in first year of life
Onset in infancy
[ more ]
0003593
Myopathy
Muscle tissue disease
0003198
Nemaline bodies 0003798
Respiratory insufficiency
Respiratory impairment
0002093
Rigidity
Muscle rigidity
0002063
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Last updated: 7/1/2020

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.

The resources below provide information about treatment options for this condition. If you have questions about which treatment is right for you, talk to your healthcare professional.

Management Guidelines

  • Orphanet Emergency Guidelines is an article which is expert-authored and peer-reviewed that is intended to guide health care professionals in emergency situations involving this condition.  

If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.

If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.

You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.

Healthcare Resources


Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.

Patient Registry

  • A registry supports research by collecting of information about patients that share something in common, such as being diagnosed with Amish Nemaline Myopathy. The type of data collected can vary from registry to registry and is based on the goals and purpose of that registry. Some registries collect contact information while others collect more detailed medical information. Learn more about registries.

    Registries for Amish Nemaline Myopathy:
    Congenital Muscle Disease International Registry
     

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 Amish Nemaline Myopathy. Click on the link to view a sample search on this topic.

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