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Living with Hydrocephaly-tall stature-joint laxity syndrome

A very rare genetic condition with extra fluid in the brain, tall height, loose joints, and a curved spine.

Understanding Hydrocephaly-tall stature-joint laxity syndrome

Hydrocephaly-tall stature-joint laxity syndrome is a very rare genetic condition described in two sisters.

It involves hydrocephalus (extra fluid in the brain) starting in infancy, tall height, loose joints (joint laxity), and a forward curve of the middle and lower spine (thoracolumbar kyphosis). It has not been described in the medical literature since 1989.

Signs & symptoms

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

  • Fluid buildup in the brain (hydrocephalus)
  • Tall height
  • Loose, double-jointed joints
  • Curved spine (kyphosis, scoliosis)
  • Long, slender fingers (arachnodactyly)
  • Shoulder dislocation

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.

  3. Ask which tests can help

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

Care & treatment

Care team
Genetic specialists (geneticists)
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
How is hydrocephalus monitored and treated?
Should the heart be checked, since aortic leakage is listed?
Would genetic counseling help our family?

Quick facts

Symptoms usually startInfant
InheritanceAutosomal Recessive

Changes in genes (also called variants) cause this condition. It is autosomal recessive, so a child inherits a changed copy of the gene from each parent.

Genetic

Also known as: daish hardman lamont syndrome; daish-hardman-lamont syndrome; hydrocephalus, tall stature, joint laxity and kyphoscoliosis; hydrocephalus, tall stature, joint laxity syndrome; hydrocephaly, tall stature, joint laxity syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Hydrocephaly-tall stature-joint laxity syndromeGARD ID 1666 · 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 Hydrocephaly-tall stature-joint laxity syndrome.

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