Clinical diagnosis of SLE under ACR/EULAR 2019 criteria \[8\]
Age between 18 and 75 years
Must have inflammatory arthralgia, i.e. signs or symptoms deemed due to active SLE according to the investigator, in relation to distribution and typical inflammatory patterns as previously suggested, including joint symptoms lasting more than 6 weeks, morning stiffness lasting ≥60 minutes, and the most severe symptoms occurring at night and early morning.
Must be capable of providing informed consent
You may not be if
\- Patients with contraindications to synovial biopsy or not accepting to perform the synovial biopsy
