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Living with Hidrotic ectodermal dysplasia, Christianson-Fourie type

A rare genetic condition affecting hair and nails, along with heart rhythm changes, that can be seen from infancy.

Understanding Hidrotic ectodermal dysplasia, Christianson-Fourie type

Hidrotic ectodermal dysplasia, Christianson-Fourie type is a rare condition that affects the hair, nails, and heart rhythm.

It is a form of ectodermal dysplasia, a group of conditions affecting skin, hair, and nails. People have sparse scalp hair and eyelashes, and eyebrows that are absent or sparse. Nails are thickened and may lift at the tip. Heart rhythm changes, such as a fast or slow heartbeat, can also occur. It may be noticed in newborns or infants.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Sparse scalp hair
  • Sparse eyelashes
  • Absent eyebrows
  • Poorly formed nails (nail dystrophy)
  • Overgrown, curved toenails
  • Limited armpit and pubic hair

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include genetic specialists and skin, hair, and nail specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    National Foundation for Ectodermal Dysplasias may keep lists of experts for this condition.

Care & treatment

Care team
Genetic specialists (geneticists); Skin, hair, and nail specialists (dermatologists)
Expert care
Expert lists: National Foundation for Ectodermal Dysplasias
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with National Foundation for Ectodermal Dysplasias and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which heart rhythm tests should we have, and how often?
Could a cardiologist be part of our care team?
Would genetic testing help our family?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant

Changes in genes (also called variants) cause this condition. It is inherited in an autosomal dominant way, meaning one changed copy of the gene can be enough to cause it.

GeneticSkin

Also known as: christianson fourie syndrome; christianson-fourie syndrome; hidrotic ectodermal dysplasia christianson fourie type

Patient organizations

Source: NIH GARD · Hidrotic ectodermal dysplasia, Christianson-Fourie typeGARD ID 2682 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Hidrotic ectodermal dysplasia, Christianson-Fourie type.

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