Flares of systemic lupus erythematosus are broadly defined as an increase in disease activity requiring an intensification of therapy. A renal flare is indicated by an increase in proteinuria and/or serum creatinine concentration, abnormal urine sediment or a reduction in creatinine clearance rate as a result of active disease. In this Review the authors examine current definitions of renal flares and describe developments in the diagnosis and treatment of renal flares.
- Ben Sprangers
- Marianne Monahan
- Gerald B. Appel