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Living with Spondyloepimetaphyseal dysplasia, Isidor type

A rare bone condition with short stature that begins after birth, bowed legs, and hip and spine changes.

Understanding Spondyloepimetaphyseal dysplasia, Isidor type

Spondyloepimetaphyseal dysplasia, Isidor type is a rare bone growth condition with severe, disproportionate short stature.

Babies have normal birth length, then growth slows early after birth. The trunk and limbs are both short. People may have very bowed legs, stiff hip joints that can't fully straighten, and an inward curve of the lower back. X-rays show flattened spine bones and changes in the hips and knees. Signs may begin in infancy.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. The summary describes:

  • Short stature with a short trunk and limbs
  • Slowed growth after birth
  • Very bowed legs (genu varum)
  • Stiff hips (flexion contractures)
  • Inward curve of the lower back
  • Flattened spine bones (platyspondyly)

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 and genetic specialists.

  3. Consider genetic testing

    Changes in RPL13 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)
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 should we monitor my child's hips and legs?
Would RPL13 gene testing help our family?
Which specialists should follow my child's growth?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant
GenesRPL13

Changes in the RPL13 gene cause this condition. It is autosomal dominant, meaning one changed copy of the gene can cause it.

Genetic

Also known as: spondyloepimetaphyseal dysplasia isidor type

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Spondyloepimetaphyseal dysplasia, Isidor typeGARD ID 21586 · 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 Spondyloepimetaphyseal dysplasia, Isidor type.

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