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Living with Endocrine-cerebro-osteodysplasia syndrome

A rare genetic condition affecting hormone glands, the brain, and the bones, present from birth.

Understanding Endocrine-cerebro-osteodysplasia syndrome

Endocrine-cerebro-osteodysplasia (ECO) syndrome is a rare genetic condition that affects the hormone system, the brain, and the bones.

GARD describes many differences in the hormone glands, brain, and skeleton. Signs are seen in newborns and infants. They can include facial differences such as cleft lip or palate, bowed limb bones, and differences in how the brain formed.

Signs & symptoms

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

  • Cleft lip or cleft palate
  • Bowed bones in the arms and legs
  • Eyes set close together (hypotelorism)
  • Small lower jaw (micrognathia)
  • Brain differences such as holoprosencephaly
  • Low-set ears

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 bone and joint specialists, genetic specialists and hormone specialists.

  3. Consider genetic testing

    Changes in CILK1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Genetic specialists (geneticists); Hormone specialists (endocrinologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
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 rare disease patient organizations for support
  • 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
Can genetic testing for the CILK1 gene confirm this diagnosis?
What is the chance of this happening again in another pregnancy?
Which specialists should be involved in care?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesCILK1

Changes in the CILK1 gene cause this condition. It is autosomal recessive, which means a child inherits a changed copy of the gene from each parent.

GeneticEndocrine

Also known as: eco syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Endocrine-cerebro-osteodysplasia syndromeGARD ID 17094 · 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 Endocrine-cerebro-osteodysplasia syndrome.

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