Calcinosis in juvenile dermatomyositis: frequency, risk factors and outcome

Area of Science:

• Rheumatology
• Pediatrics
• Dermatology

Background:

• Juvenile dermatomyositis (JDM) is a rare autoimmune disease affecting children.
• Calcinosis, the deposition of calcium in soft tissues, is a frequent and debilitating complication of JDM.

Purpose of the Study:

• To determine the prevalence of calcinosis in JDM patients.
• To identify risk factors associated with calcinosis development in JDM.
• To evaluate potential therapeutic interventions for JDM-associated calcinosis.

Main Methods:

• Retrospective chart review of 39 children diagnosed with JDM between 2004 and 2015.
• Comparison of demographic, clinical, laboratory, and therapeutic characteristics between patients with and without calcinosis.
• Analysis of treatment outcomes, including alendronate therapy and surgical intervention.

Main Results:

• Calcinosis was present in 23.1% of the studied JDM patients.
• Significant associations found between calcinosis and delayed diagnosis/treatment, prolonged disease duration, joint contractures, and cardiac involvement.
• Alendronate therapy showed partial reduction in calcinosis in 66.7% of treated patients; surgical removal was performed in one case.

Conclusions:

• Calcinosis is a common complication of JDM, linked to diagnostic delays, disease chronicity, and cardiac issues.
• Early diagnosis and treatment initiation are crucial for managing JDM.
• Alendronate shows promise as a therapeutic option for managing calcinosis in JDM.