Axial Involvement in Psoriatic Arthritis Analysis of a Greek Psoriatic Arthritis (PsA) cohort shows that nearly one quarter of patients have axial involvement, and among them, ∼30% have isolated spinal axPsA and nr-axSpA, respectively. https://t.co/MmRMlEp7zR https://t.co/ZAbfpIWwRM