Tricho Dento Osseous Syndrome
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Tricho Dento Osseous Syndrome is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
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
PO Box 114
Mascoutah, IL 62258-0114
Children's Craniofacial Association
13140 Coit Road
Dallas, TX 75240
FACES: The National Craniofacial Association
P. O. Box 11082
Chattanooga, TN 37401
PO Box 751112
Las Vegas, NV 89136
NIH/National Arthritis and Musculoskeletal and Skin Diseases Information Clearinghouse
1 AMS Circle
Bethesda, MD 20892-3675
NIH/National Oral Health Information Clearinghouse
1 NOHIC Way
Bethesda, MD 20892-3500
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
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