Rare diseases · Sign or symptom
Ectodermal dysplasia
HP:0000968
What it means
Ectodermal dysplasia is a group of conditions in which there is abnormal development of the skin, hair, nails, teeth, or sweat glands.
This term is kept in the HPO for now as 'ectodermal dysplasia' has been recorded as a phenotypic of other disorders such as DEAFNESS WITH ANHIDROTIC ECTODERMAL DYSPLASIA (MIM125050). Nevertheless it is preferable to use precise descriptions of the phenotypic abnormalities and this term should not be used for new annotations. It will be made obsolete in the future.
Rare diseases that can present with this9
Very common80–99%
6The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions, and Orphanet separately records 1 disease where this sign is specifically absent. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.