ectodermal dysplasia, trichoodontoonychial type
Findings
No curated finding names ectodermal dysplasia, trichoodontoonychial type yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Ectodermal dysplasia, trichoodontoonychial type is a form of ectodermal dysplasia with hair, teeth and nail involvement characterized predominantly by hypodontia, hypotrichosis, delayed hair growth and brittle nails. Additionally, focal dermal hypoplasia, irregular hyperpigmentation, hypoplastic or absent nipples, amastia, hearing impairment, congenital hip dislocation and asthma have been associated. There have been no further descriptions in the literature since 1996.
Definition from the Mondo Disease Ontology (MONDO:0007511), read 2026-09-29. CC BY 4.0.
Features
12 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- Abnormal dental morphologyHPOHP:0006482
- Very frequent (80% to 99% of cases)
- Abnormal toenail morphologyHPOHP:0008388
- Very frequent (80% to 99% of cases)
- Abnormality of the noseHPOHP:0000366
- Very frequent (80% to 99% of cases)
- HypodontiaHPOHP:0000668
- Very frequent (80% to 99% of cases)
- Irregular hyperpigmentation of backHPOHP:0007521
- Very frequent (80% to 99% of cases)
- LipoatrophyHPOHP:0100578
- Very frequent (80% to 99% of cases)
Where it sits
- A kind of