Camptodactyly-arthropathy-coxavara-pericarditis syndrome in Saudi Arabia: Clinical and molecular genetic findings in 22 patients

CACP syndrome is an autosomal recessive disorder occurring due to mutations in the gene PRG4 encoding lubricin; it is not an uncommon disorder in Saudi Arabia. Pericarditis is rarely seen in our patients. Our data suggest that CACP syndrome may be easily confused with JIA, causing a delay in diagnosis and probably unnecessary treatment with antirheumatic drugs including biologic agents.