Spondyloperipheral dysplasia-short ulna syndrome

What it is

From: Orphanet

Spondyloperipheral dysplasia-short ulna syndrome is a rare, genetic, primary bone dysplasia, with highly variable phenotype, typically characterized by platyspondyly, brachydactyly type E changes (short metacarpals and metatarsals, short distal phalanges in hands and feet), bilateral short ulnae and mild short stature. Other reported features include additional skeletal findings (e.g. midface hypoplasia, degenerative changes in proximal femora, limited elbow extension, bilateral sacralization of L5, clubfeet), as well as myopia, hearing loss, and intellectual disability.

Reported clinical features and what the terms mean

The following findings are associated with this condition in Orphanet. They are not a checklist for diagnosing yourself, and they do not all occur in every affected person. Some are examination, imaging or laboratory findings that cannot be recognised at home.

The frequency labels describe how often a finding was reported among people with the condition in the source. They do not give the chance that a person with that symptom has the condition. Definitions below reproduce HPO terminology; they explain the term, not the likely severity in an individual.

Abnormality of the hip joint · Frequent (79-30%)

An abnormality of the hip joint.

Abnormality of the vertebral endplates · Frequent (79-30%)

Any abnormality of the vertebral end plates, which are the top and bottom portions of the vertebral bodies that interface with the vertebral disks.

Cleft palate · Frequent (79-30%)

Cleft palate is a developmental defect of the palate resulting from a failure of fusion of the palatine processes and manifesting as a separation of the roof of the mouth (soft and hard palate).

Delayed pubic bone ossification · Frequent (79-30%)

Delayed maturation and calcification of the pubic bone.

Disproportionate short stature · Frequent (79-30%)

A kind of short stature in which different regions of the body are shortened to differing extents.

Flattened epiphysis · Frequent (79-30%)

Abnormal flatness (decreased height) of epiphyses.

Hearing impairment · Frequent (79-30%)

A decreased magnitude of the sensory perception of sound.

Hypoplasia of the ulna · Frequent (79-30%)

Underdevelopment of the ulna.

Irregular epiphyses · Frequent (79-30%)

An alteration of the normally smooth contour of the epiphysis leading to an irregular appearance.

Myopia · Frequent (79-30%)

An abnormality of refraction characterized by the ability to see objects nearby clearly, while objects in the distance appear blurry.

Type E brachydactyly · Frequent (79-30%)

In type E brachydactyly, shortening of the fingers is mainly in the metacarpals and metatarsals.

Aplasia/hypoplasia involving bones of the extremities · Frequent (79-30%)

Arthralgia of the hip · Occasional (29-5%)

Joint pain affecting the hip.

Broad hallux · Occasional (29-5%)

Visible increase in width of the hallux without an increase in the dorso-ventral dimension.

Other findings in the same source

From: Orphanet

Additional reported features include Cataract (Occasional (29-5%)); Flattened femoral head (Occasional (29-5%)); Hip dysplasia (Occasional (29-5%)); Limited elbow extension (Occasional (29-5%)); Ovoid vertebral bodies (Occasional (29-5%)); Platyspondyly (Occasional (29-5%)); Retinal detachment (Occasional (29-5%)); Short metatarsal (Occasional (29-5%)); Talipes (Occasional (29-5%)). This is a selected summary, not a complete description of the condition.

When it may begin

From: Orphanet

Infancy; Neonatal

Inheritance in the source

From: Orphanet

Autosomal dominant

Frequency and the population described

From: Orphanet

Point prevalence: <1 / 1 000 000; Worldwide; Class only. Reported family(ies): 10.0; Worldwide. This is a published case count, not prevalence.

Understanding the inheritance label

From: MedlinePlus Genetics

An autosomal dominant pattern means that one altered copy of a relevant gene can be sufficient for the condition. Some affected people inherit the change; others have a new change without an affected parent. The precise finding, family history and condition determine what this means for relatives.

Which doctor should you see?

The suggested department for discussing Spondyloperipheral dysplasia-short ulna syndrome is Orthopaedics, with a orthopaedic specialist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

Additional services that may be relevant, depending on the findings, include: Clinical Genetics.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• What explains the change in pain, movement or function?
• Which activities need adjustment while the diagnosis is being clarified?
• What are the roles of rehabilitation, observation and surgery in this situation?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Spondyloperipheral dysplasia-short ulna syndrome. That gap does not mean that treatment is unavailable. A clinician needs to establish the diagnosis and review current guidance before recommending medicines, procedures, rehabilitation or other support.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.