JIA does not automatically “turn into” adult RA in all cases, but in some patients—depending on subtype—an inflammatory arthritis pattern can persist into adulthood. In polyarticular and RF-positive patterns, the phenotype can resemble adult RA more closely. This is often better understood as continuity of inflammatory disease biology rather than a sudden transformation. Discontinuing follow-up or therapy during the transition to adulthood can increase flare risk and functional decline.

That is why transition care is a strategic step: a planned handover from pediatric to adult rheumatology, sustained treat-to-target goals, and uninterrupted monitoring. The goal is to maintain control in adulthood, minimizing joint damage and protecting long-term quality of life.