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Living with Dislocation of the hip-dysmorphism syndrome

A rare syndrome present from birth with both hips out of joint, distinct facial features, and very flexible joints.

Understanding Dislocation of the hip-dysmorphism syndrome

Dislocation of the hip-dysmorphism syndrome is a rare syndrome present from birth with dislocated hips on both sides and distinct facial features.

Facial features include a flat mid-face, wide-set eyes, puffy eyes, a broad nasal bridge, and a carp-shaped mouth. Joints are very flexible. Heart defects, knee dislocation, groin hernia, and urine backflow have also been reported. GARD notes no further descriptions since 1995.

Signs & symptoms

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

  • Hip dislocation present from birth
  • Very flexible joints
  • Heart differences
  • Distinct facial features
  • Palate differences
  • Fingers that deviate to the side

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. Consider genetic testing

    Changes in TRIM33 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
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
Can genetic testing of the TRIM33 gene confirm the diagnosis?
How should the hips be treated?
Should the heart and kidneys be checked?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesTRIM33

Changes in the TRIM33 gene cause this condition. It is autosomal recessive, so a child inherits a changed copy of the gene from each parent.

Genetic

Also known as: collins-pope syndrome; dislocation of hip, congenital, with hyperextensibility of fingers and facial dysmorphism

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Dislocation of the hip-dysmorphism syndromeGARD ID 1428 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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