Inflammatory Myopathies in Primary Sjögren's Syndrome

Characterization of Inflammatory Muscle Involvement in Patients With Primary Sjögren's Syndrome

The AMISS study will characterize the features of muscle disease in patients with primary Sjogren's syndrome (pSS).

Muscle disease is associated with pSS, but this association is not well defined. The AMISS study, a retrospective observational multicentric study, will recruit patients with pSS and muscle involvement in order to characterize in details the features of this association (epidemiological aspects, clinical presentation, biological, radiological and histological findings, treatments and outcomes).

Inclusion Criteria:

• diagnosis of Primary Sjögren's syndrome according to the ACR/EULAR classification criteria
• inflammatory muscle involvement, as diagnosed by the treating physician

Exclusion Criteria:

• Diagnosis of inflammatory myopathy before the diagnosis of pSS