Abstract
Methods Retrospective analysis in 319 patients with PAS admitted to our unit for chronic pain in 2010. Patients` medical histories have been worked up concerning chronic inflammatory diseases. The observed frequencies of JIA subtypes have been compared to frequencies recorded by the national German registry for rheumatic diseases (Deutsches Rheumaforschungszentrum DRFZ 2008). Results The medical history reported JIA in 61 patients (19%) and chronic multifocal osteomyelitis (CRMO) in 9 (3%) of the patients. (Table 1). More than one third of the histories were not conclusive for the diagnosis of JIA according to the ILAR criteria, mainly because arthritis had not been assured to be present for more than 6 weeks.
Highlights
Primary pain amplification syndrome (PAS [Juvenile fibromyalgia]) is an important differential diagnosis in patients suspected to have JIA
Secondary PAS may occur within the course of JIA after remission
The medical history reported JIA in 61 patients (19%) and chronic multifocal osteomyelitis (CRMO) in 9 (3%) of the patients. (Table 1)
Summary
Primary pain amplification syndrome (PAS [Juvenile fibromyalgia]) is an important differential diagnosis in patients suspected to have JIA. Secondary PAS may occur within the course of JIA after remission. Aim Characterizing the occurrence of JIA in a group of patients suffering from PAS
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