National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

Progressive pseudorheumatoid dysplasia


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Other Names:
Spondyloepiphyseal dysplasia tarda-progressive arthropathy syndrome; Progressive pseudorheumatoid arthropathy of childhood; PPAC; Spondyloepiphyseal dysplasia tarda-progressive arthropathy syndrome; Progressive pseudorheumatoid arthropathy of childhood; PPAC; Spondyloepiphyseal dysplasia tarda - progressive arthropathy; PPD; SEDT-PA; Arthropathy, progressive pseudorheumatoid, of childhood; Spondyloepiphyseal dysplasia tarda with progressive arthropathy; Progressive pseudorheumatoid chondrodysplasia See More
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Progressive pseudorheumatoid disyplasia (PPD) is a disorder of bone and cartilage that affects many joints. It manifests between the age of 3 and 6 years with joint pain and progressive joint stiffness. Major signs and symptoms include stiff joints (contractures), short stature, and widening of the ends of the finger and toe bones as well as other tubular bones.[1] Bony widening at the fingers' joints progresses leading to permanent bending of the fingers (camptodactyly). Spine involvement results in short trunk and hunching of the back (kyphosis).[2] It may initially be mistaken for juvenile rheumatoid arthritis, however people with this condition do not have the laboratory test results of juvenile rheumatoid arthritis. PPD is caused by a mutation in the WISP3 gene and is inherited in an autosomal recessive pattern. There is still no cure. Treatment may include pain medication and hip and knee joint replacement surgery at an early age.[1][2]

 

 

Last updated: 4/21/2016

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

Showing of 29 |
Medical Terms Other Names
Learn More:
HPO ID
80%-99% of people have these symptoms
Gait disturbance
Abnormal gait
Abnormal walk
Impaired gait
[ more ]
0001288
Joint stiffness
Stiff joint
Stiff joints
[ more ]
0001387
Methylmalonic acidemia 0002912
Short stature
Decreased body height
Small stature
[ more ]
0004322
30%-79% of people have these symptoms
Abnormality of the knee 0002815
Enlarged interphalangeal joints
Enlarged hinge joints
0006247
Flattened epiphysis
Flat end part of bone
0003071
Kyphosis
Hunched back
Round back
[ more ]
0002808
Osteoarthritis
Degenerative joint disease
0002758
Sclerotic vertebral endplates 0004576
Scoliosis 0002650
Percent of people who have these symptoms is not available through HPO
Abnormality of the foot
Abnormal feet morphology
Abnormality of the feet
Foot deformities
Foot deformity
[ more ]
0001760
Arthropathy
Disease of the joints
0003040
Autosomal recessive inheritance 0000007
Camptodactyly of finger
Permanent flexion of the finger
0100490
Coxa vara 0002812
Decreased cervical spine mobility
Limited neck movement
0004637
Difficulty walking
Difficulty in walking
0002355
Enlarged epiphyses
Large end part of bone
0010580
Enlarged metacarpophalangeal joints 0006163
Enlargement of the proximal femoral epiphysis
Enlarged end part of innermost thighbone
0003371
Genu varum
Outward bow-leggedness
Outward bowing at knees
[ more ]
0002970
Joint swelling 0001386
Kyphoscoliosis 0002751
Metaphyseal widening
Broad wide portion of long bone
0003016
Muscle weakness
Muscular weakness
0001324
Osteoporosis 0000939
Platyspondyly
Flattened vertebrae
0000926
Waddling gait
'Waddling' gait
Waddling walk
[ more ]
0002515
Showing of 29 |
Last updated: 7/1/2020

Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.

Testing Resources

  • The Genetic Testing Registry (GTR) provides information about the genetic tests for this condition. The intended audience for the GTR is health care providers and researchers. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.
  • Orphanet lists international laboratories offering diagnostic testing for this condition.

If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.

If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.

You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.

Healthcare Resources


Related diseases are conditions that have similar signs and symptoms. A health care provider may consider these conditions in the table below when making a diagnosis. Please note that the table may not include all the possible conditions related to this disease.

Conditions with similar signs and symptoms from Orphanet
PPAC can be initially misdiagnosed as juvenile rheumatoid arthritis but is distinguished on radiographic analysis (especially the platyspondyly and generalised epiphyseal dysplasia) and the absence of inflammatory joint disease. PPAC must be differentiated from juvenile idiopathic arthritis to ensure optimal treatment and to avoid unnecessary exposure to immunosuppressants.
Visit the Orphanet disease page for more information.

Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.

Clinical Research Resources

  • The U.S. National Institutes of Health, through the National Library of Medicine, developed ClinicalTrials.gov to provide patients, family members, and members of the public with current information on clinical research studies. There is a study titled Evaluation and Treatment of Skeletal Diseases which may be of interest to you.
  • Orphanet lists European clinical trials, research studies, and patient registries enrolling people with this condition. 

Patient Registry

  • A registry supports research by collecting of information about patients that share something in common, such as being diagnosed with Progressive pseudorheumatoid dysplasia. The type of data collected can vary from registry to registry and is based on the goals and purpose of that registry. Some registries collect contact information while others collect more detailed medical information. Learn more about registries.

    Registries for Progressive pseudorheumatoid dysplasia:
    International Skeletal Dysplasia Registry (ISDR)
     

Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.

Organizations Supporting this Disease


These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

Where to Start

  • Genetics Home Reference contains information on Progressive pseudorheumatoid dysplasia. This website is maintained by the National Library of Medicine.

In-Depth Information

  • GeneReviews provides current, expert-authored, peer-reviewed, full-text articles describing the application of genetic testing to the diagnosis, management, and genetic counseling of patients with specific inherited conditions.
  • MeSH® (Medical Subject Headings) is a terminology tool used by the National Library of Medicine. Click on the link to view information on this topic.
  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Progressive pseudorheumatoid dysplasia. Click on the link to view a sample search on this topic.
  • Medscape Reference has information on spondyloepiphyseal dysplasia in general. You may need to register to view this medical reference, but registration is free.

Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know.


  1. Spranger JW, Brill PW, Poznanski A. Bone dysplasias, 2nd ed. New York, NY: Oxford University Press; 2002;
  2. Bhavani GS, Shah H, Shukla A, Dalal A & Girisha KM. Progressive pseudorheumatoid dysplasia. GeneReviews. November, 2015; http://www.ncbi.nlm.nih.gov/books/NBK327267/.