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Tricho Dento Osseous Syndrome
National Organization for Rare Disorders, Inc.
- TDO Syndrome
Tricho-dento-osseous (TDO) syndrome is an autosomal dominant genetic disorder that belongs to a group of diseases known as ectodermal dysplasias. Ectodermal dysplasias typically affect the hair, teeth, nails, and/or skin. TDO syndrome is characterized by kinky or curly hair; poorly developed tooth enamel; and unusual thickness and/or denseness (sclerosis) of the top portion of the skull (calvaria) and/or the long bones (i.e., bones in the arms and legs). In some cases, affected individuals also exhibit abnormally thin, brittle nails or premature closure (fusion) of the fibrous joints between certain bones in the skull (craniosynostosis), causing the head to appear abnormally long and narrow (dolicocephaly).
There may be three distinct types of TDO syndrome. Some researchers suggest that these variants may be differentiated mainly by whether the calvaria and/or long bones exhibit abnormal hardening (sclerosis), thickening, and/or density. Other symptoms also vary among the three disorder types.
National Foundation for Ectodermal Dysplasias
410 East Main Street
Mascoutah, IL 62258-0114
Children's Craniofacial Association
13140 Coit Road
Dallas, TX 75240
FACES: The National Craniofacial Association
PO Box 11082
Chattanooga, TN 37401
Post Office Box 751112
Limekiln, PA 19535
NIH/National Institute of Arthritis and Musculoskeletal and Skin Diseases
One AMS Circle
Bethesda, MD 20892-3675
NIH/National Institute of Dental and Craniofacial Research
Building 31, Room 2C39,
31 Center Drive, MSC 2290
Bethesda, MD 20892
Craniofacial Foundation of America
975 East Third Street
Chattanooga, TN 37403
Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
For a Complete Report
This is an abstract of a report from the National Organization for Rare Disorders, Inc.® (NORD). Cigna members can access the complete report by logging into myCigna.com. For non-Cigna members, a copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html.
The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.
It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report
This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.
For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site www.rarediseases.org or email email@example.com
Last Updated: 4/22/2008
Copyright 1987, 1989, 1990, 1996, 1998, 2006 National Organization for Rare Disorders, Inc.