Systemic lupus erythematosus (SLE) and antiphospholipid syndrome (APS) often overlap. While there have been some therapeutic advances, significant needs remain around diagnosis and monitoring, with a gap around definitions and biomarkers for refractory disease or specific subsets. EULAR – The European Alliance of Associations for Rheumatology – held its 2026 annual Congress in London, where new data showcased advances in the field.