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

Autosomal dominant Charcot-Marie-Tooth disease type 2 with giant axons


Other Names:
Autosomal dominant hereditary motor and sensory neuropathy type 2 with giant axons; CMT2 with giant axons; HMSN2 with giant axons
Categories:
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
orphanet

Orpha Number: 401964

Definition
A rare subtype of axonal hereditary motor and sensory neuropathy characterized by distal muscle weakness and atrophy (principally of peroneal muscles) associated with distal sensory loss (tactile, vibration), pes cavus present since infancy or childhood, and axonal swelling with neurofilament accumulation on nerve biopsy. Other features may include hand muscle involvement, hypo/arreflexia, gait disturbances, muscle cramps, toe abnormalities and mild cardiomyopathy.

Visit the Orphanet disease page for more resources.
Last updated: 10/1/2018

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
Percent of people who have these symptoms is not available through HPO
Areflexia
Absent tendon reflexes
0001284
Autosomal dominant inheritance 0000006
Cardiomyopathy
Disease of the heart muscle
0001638
Decreased motor nerve conduction velocity 0003431
Distal amyotrophy
Distal muscle wasting
0003693
Distal muscle weakness
Weakness of outermost muscles
0002460
EMG: chronic denervation signs 0003444
Hammertoe
Hammer toe
Hammertoes
[ more ] 		0001765
Hyporeflexia
Decreased reflex response
Decreased reflexes
[ more ] 		0001265
Impaired distal tactile sensation
Decreased touch sensation in extremities
0006937
Impaired distal vibration sensation 0006886
Onion bulb formation 0003383
Peripheral axonal neuropathy 0003477
Pes cavus
High-arched foot
0001761
Steppage gait
High stepping
0003376
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Last updated: 7/1/2020

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

Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

Organizations Supporting this Disease

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.

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.

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