Psoriatic arthritis (PsA) is a complex inflammatory disease often complicated by obesity, which not only worsens disease activity but also impairs treatment response. At ACR Convergence 2025, three compelling studies spanning pharmacologic, lifestyle, and longitudinal observational data converged on a central theme: weight loss is a powerful modulator of PsA outcomes, regardless of the intervention used.

IgG4 is a rare autoimmune disease with excessive IgG4 immunoglobulins that can affect multiple organs yielding plasma cell deposition (inflammation) and fibrosis.

Day 3 in Chicago is hump day, the last big full day of presentations and posters.  The day began with an 8AM plenary session, which brings me to the first of my three notables from today:

My favorite session at ACR Convergence is often the “Great Debate.” The debate this year also evaluated one of my favorite topics – ultrasound in giant cell arteritis (GCA). More specifically, it asked the question of whether biopsy or ultrasound should be the preferred modality for diagnosing GCA.

At ACR 2025, the session “27M02: Nutrition for Rheumatic Disease: Where Aging Biology, Sarcopenia, and Diet Intersect” invited the audience to view rheumatic disease through the lens of biological aging and to consider how nutrition and exercise can serve as integrative lifestyle interventions.