Question 1

What is camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

Camptodactyly-arthropathy-coxa vara-pericarditis syndrome (also known as CACP syndrome) is a rare genetic rheumatologic condition that primarily affects the joints, skeletal structure, and, in some cases, the heart. It is caused by pathogenic variants in the PRG4 gene, which is responsible for producing lubricin, a protein essential for joint lubrication. The condition typically presents in early childhood with congenital or early-onset camptodactyly and progressive joint abnormalities. It is extremely rare, affecting fewer than 1 in 1,000,000 people.

Question 2

What are the symptoms of camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

Individuals with this syndrome often present with a range of musculoskeletal abnormalities. Characteristic findings include camptodactyly of both the fingers and toes, symmetrical polyarticular arthropathy affecting large joints such as the knees, elbows, and wrists, and progressive coxa vara deformity. Additional features noted in many affected individuals are wrist swelling, lumbar hyperlordosis, short femoral neck, and in some cases, complications like osteoporosis, bone cysts, osteoarthritis, and less commonly, non-inflammatory pericarditis or pleuritis. Not all individuals experience all features, and severity varies considerably.

Question 3

What causes camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

Camptodactyly-arthropathy-coxa vara-pericarditis syndrome is caused by pathogenic variants in the PRG4 gene, which encodes lubricin—a protein that plays a crucial role in ensuring smooth joint movement and cartilage health. The condition is inherited in an autosomal recessive pattern, meaning that an individual must inherit two copies of the defective gene, one from each parent, to be affected. It is more common when parents share a common ancestor because both may carry the same rare genetic variant. Genetic counseling is recommended to help families understand the recurrence risk and to explore options for family planning. Associated genes include PRG4.

Question 4

How is camptodactyly-arthropathy-coxa vara-pericarditis syndrome inherited?

Accepted Answer

camptodactyly-arthropathy-coxa vara-pericarditis syndrome follows an autosomal recessive inheritance pattern. This means a child must inherit a copy of the altered gene from both parents to develop the condition. Parents who each carry one copy typically do not show symptoms.

Question 5

How rare is camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

camptodactyly-arthropathy-coxa vara-pericarditis syndrome is classified as very rare. The estimated prevalence is approximately <1 in 1,000,000. Because rare disease data can be limited, actual numbers may differ from published estimates.

Question 6

How is camptodactyly-arthropathy-coxa vara-pericarditis syndrome diagnosed?

Accepted Answer

Diagnosis is confirmed through molecular genetic testing that identifies pathogenic variants in the PRG4 gene. In addition to genetic testing, a comprehensive clinical evaluation—including assessment of joint abnormalities, developmental history, and family history—is essential to distinguish this syndrome from other conditions with overlapping features. Because many of these clinical features can be seen in other disorders, genetic testing is crucial to achieve a definitive diagnosis.

Question 7

Are there treatments for camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

Currently, management focuses on supportive care and symptom management since there are no treatments specifically approved for this syndrome. Treatment plans are highly individualized and typically involve a multidisciplinary team of specialists such as rheumatologists, orthopedists, and physical therapists who work together to maintain mobility and manage joint pain. Regular surveillance is an essential part of long-term care, helping to identify potential complications before they become severe. Patients should discuss treatment options with their healthcare team, and genetic counseling is recommended to support family planning.

Question 8

Are there clinical trials for camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

Yes, there are currently 5 active clinical trials for camptodactyly-arthropathy-coxa vara-pericarditis syndrome registered on ClinicalTrials.gov. Clinical trials test new treatments, procedures, or approaches. Your healthcare provider can help determine if a trial might be appropriate for your situation. Visit the Treatment section of this page for more details.

Question 9

What are the potential complications of camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

Individuals with camptodactyly-arthropathy-coxa vara-pericarditis syndrome may experience complications such as osteoporosis, bone cysts, and osteoarthritis. Additionally, some may develop non-inflammatory pericarditis or pleuritis. It's important for patients to have regular check-ups to monitor for these complications and manage them early.

Question 10

How does camptodactyly-arthropathy-coxa vara-pericarditis syndrome affect daily life?

Accepted Answer

Daily life for individuals with camptodactyly-arthropathy-coxa vara-pericarditis syndrome can vary widely based on the severity of symptoms. Many may need support for joint pain and mobility issues, which can affect activities like walking or playing. A multidisciplinary team, including physical therapists and rheumatologists, can help create a plan to manage these challenges.

Question 11

What is the prognosis for someone with camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

The prognosis for individuals with camptodactyly-arthropathy-coxa vara-pericarditis syndrome is highly variable. Many can maintain a good quality of life with supportive treatments and regular monitoring. However, the severity of symptoms can differ greatly, and some may experience progression of their condition over time.

Question 12

What specialists should be involved in the care of someone with camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Accepted Answer

Care for someone with camptodactyly-arthropathy-coxa vara-pericarditis syndrome typically involves a multidisciplinary team. This may include rheumatologists for joint issues, orthopedists for skeletal concerns, and physical therapists for mobility support. Working with specialists familiar with the syndrome can help ensure comprehensive care.

Organ System	Phenotype Count	Example Features
Bones and joints	8	Joint inflammation (arthritis), Excessive inward curve of the lower back (lumbar hyperlordosis), Osteoarthritis of the elbow
Heart and blood vessels	4	Constrictive pericarditis, Mitral valve prolapse, Mitral regurgitation
Arms and legs	3	Congenital finger flexion contractures, Camptodactyly of toe, Camptodactyly of finger
Muscles	2	Wrist flexion contracture, Congenital finger flexion contractures
Pregnancy and birth	1	Congenital finger flexion contractures
Digestive system	1	Ascites
Ears	1	Infantile sensorineural hearing impairment
Eyes	1	Nuclear cataract

Research Type	Count	% of Total
Research summaries	12	41%
Patient case studies	9	31%
Disease patterns and progression	4	14%
Laboratory research	3	10%
Testing and diagnosis research	1	3%

Kisho

camptodactyly-arthropathy-coxa vara-pericarditis syndrome

Overview

Clinical Presentation

Explore clinical features

Genetic Landscape

Diagnosis

Prognosis

Research Landscape

Recent Publications

Medical References

External Resources

OMIM

Orphanet

GARD

Questions for Your Care Team

Questions for Your Care Team

FAQ

Frequently Asked Questions

Latest News & Developments

ABCDE of complex pericarditis cases.

[Pericarditis, arthritis, camptodactyly syndrome: four decades after its original description].

camptodactyly-arthropathy-coxa vara-pericarditis syndrome

Overview

Clinical Presentation

Explore clinical features

Genetic Landscape

Diagnosis

Prognosis

Research Landscape

Recent Publications

Medical References

External Resources

OMIM

Orphanet

GARD

Related Diseases

Questions for Your Care Team

Questions for Your Care Team

FAQ

Frequently Asked Questions

What is camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

What are the symptoms of camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

What causes camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

How is camptodactyly-arthropathy-coxa vara-pericarditis syndrome inherited?

How rare is camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

How is camptodactyly-arthropathy-coxa vara-pericarditis syndrome diagnosed?

Are there treatments for camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Are there clinical trials for camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

What are the potential complications of camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

How does camptodactyly-arthropathy-coxa vara-pericarditis syndrome affect daily life?

What is the prognosis for someone with camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

What specialists should be involved in the care of someone with camptodactyly-arthropathy-coxa vara-pericarditis syndrome?

Latest News & Developments

ABCDE of complex pericarditis cases.

[Pericarditis, arthritis, camptodactyly syndrome: four decades after its original description].