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  3. Witkop syndrome
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Witkop syndrome


Title


Other Names:
Tooth and nail syndrome; TNS; Dysplasia of nails with hypodontia; Tooth and nail syndrome; TNS; Dysplasia of nails with hypodontia; Hypodontia - dysplasia of nails See More
Categories:
Congenital and Genetic Diseases; Mouth Diseases; Skin Diseases
This disease is grouped under:
Ectodermal dysplasia

Summary Summary


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

Orpha Number: 2228

Definition
Hypodontia-nail dysplasia syndrome is a form of ectodermal dysplasia.

Epidemiology
Its incidence has been estimated at around 1-2 in 10,000.

Clinical description
The primary teeth are usually normal but the permanent teeth often fail to erupt. The mandibular incisors, second molars, and maxillary canines are frequently absent and the crowns may be small and conical. Lip eversion may be present. Nails are usually small, thin and brittle with longitudinal ridges, pitting and koilonychias. Congenital absence of the nail plate has also been reported. Toenails are usually more severely affected than fingernails. Sweat glands, heat tolerance and hair are normal, although fine hair has been described in some cases.

Etiology
The syndrome is caused by a mutation in the MSX1 gene (4p16.1).

Diagnostic methods
Diagnosis is usually made during mid-childhood when persistence of the primary dentition becomes apparent, but the syndrome may be difficult to diagnose as the nail defects may be mild.

Differential diagnosis
The differential diagnosis should include other forms of ectodermal dysplasia, in particular hypohidrotic ectodermal dysplasia (see these terms).

Genetic counseling
Transmission is autosomal dominant.

Management and treatment
There is no specific treatment but oral health care and dental management are recommended.

Prognosis
The prognosis is good. The nail defects usually become less apparent with age and the nails often appear normal by adulthood.

Visit the Orphanet disease page for more resources.
Last updated: 3/22/2007

Symptoms Symptoms


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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.

Showing of 19 |
Medical Terms Other Names
Learn More:
HPO ID
80%-99% of people have these symptoms
Agenesis of permanent teeth
Failure of development of permanent teeth
Missing teeth
[ more ]
0006349
Conical tooth
Cone shaped tooth
Shark tooth
[ more ]
0000698
Delayed eruption of teeth
Delayed eruption
Delayed teeth eruption
Delayed tooth eruption
Eruption, delayed
Late eruption of teeth
Late tooth eruption
[ more ]
0000684
Fragile nails
Brittle nails
0001808
Hypodontia
Failure of development of between one and six teeth
0000668
Hypoplastic fingernail
Small fingernail
Underdeveloped fingernail
[ more ]
0001804
Hypoplastic toenails
Underdeveloped toenails
0001800
Ridged fingernail
Longitudinally grooved fingernails
0008402
Thin toenail 0012746
30%-79% of people have these symptoms
Everted lower lip vermilion
Drooping lower lip
Outward turned lower lip
[ more ]
0000232
Fine hair
Fine hair shaft
Fine hair texture
Thin hair shaft
Thin hair texture
[ more ]
0002213
5%-29% of people have these symptoms
Polycystic ovaries 0000147
Percent of people who have these symptoms is not available through HPO
Autosomal dominant inheritance 0000006
Concave nail
Spoon-shaped nails
0001598
Microdontia of primary teeth
Decreased width of baby teeth
Decreased width of milk teeth
[ more ]
0006347
Nail pits
Nail pitting
Pitted nails
[ more ]
0001803
Ridged nail
Grooved nails
Nail ridging
[ more ]
0001807
Small nail
Small nails
0001792
Sparse hair 0008070
Showing of 19 |
Do you have more information about symptoms of this disease? We want to hear from you.
Last updated: 12/1/2019
Do you have updated information on this disease? We want to hear from you.

Find a Specialist Find a Specialist


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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

  • To find a medical professional who specializes in genetics, you can ask your doctor for a referral or you can search for one yourself. Online directories are provided by the American College of Medical Genetics and the National Society of Genetic Counselors. If you need additional help, contact a GARD Information Specialist. You can also learn more about genetic consultations from Genetics Home Reference.

Learn More Learn More


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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.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Witkop syndrome. Click on the link to view a sample search on this topic.

GARD Answers GARD Answers


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Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know.

Have a question? Contact a GARD Information Specialist.
You can help advance
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You can help advance rare disease research!
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