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Living with Spondyloepimetaphyseal dysplasia, PAPSS2 type

A rare bone condition with short stature, short bowed legs, and early joint wear, with normal intelligence.

Understanding Spondyloepimetaphyseal dysplasia, PAPSS2 type

Spondyloepimetaphyseal dysplasia, PAPSS2 type is a rare bone condition that causes short stature and bowed lower limbs.

People have short stature, short and bowed lower limbs, and mildly short fingers. The spine may curve (kyphoscoliosis), and walking may be affected. The knee joints are enlarged, and joint wear may start early. Intelligence is normal. Signs may begin in the newborn or infant years.

Signs & symptoms

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

  • Short stature
  • Short, bowed lower limbs
  • Mildly short fingers
  • Curved spine (kyphoscoliosis)
  • Enlarged knee joints
  • Early joint wear (osteoarthropathy)

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 PAPSS2 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Little People of America may keep lists of experts for this condition.

Care & treatment

Care team
Bone and joint specialists (orthopedists or orthopedic surgeons); Genetic specialists (geneticists)
Expert care
Expert lists: Little People of America
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 Little People of America
  • 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 spine and joints?
Would PAPSS2 gene testing help our family?
What can we do about early joint pain or wear?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesPAPSS2

Changes in the PAPSS2 gene cause this condition. It is autosomal recessive, meaning a child inherits a changed copy of the gene from each parent.

Genetic

Also known as: brachyolmia 4 with mild epiphyseal and metaphyseal changes; brachyolmia type 4 with mild epiphyseal and metaphyseal changes; semd, pakistani type; spondylodysplasia and premature pubarche; spondyloepimetaphyseal dysplasia 3-prime-phosphoadenosine 5-prime-phosphosulfate synthase 2 type; spondyloepimetaphyseal dysplasia pakistani type

Patient organizations

Source: NIH GARD · Spondyloepimetaphyseal dysplasia, PAPSS2 typeGARD ID 16813 · 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

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