(Vienna, 06-03-2026) For a long time, the synovial membrane, known as the synovium, was primarily understood as the lining of the joint cavity. However, in his perspective paper currently published in Annals of Anatomy, Peter Mandl from MedUni Vienna describes it as a dynamic interface where biological processes, structural changes in the joint and the individual perception of patients converge. This concept of the "synovial interface " provides a structured framework for differentiated, individualised care for patients with inflammatory joint diseases.
The concept of the synovial interface assumes that inflammation of the synovial membrane (synovitis) is not only a molecular inflammatory process, but also involves structural changes such as joint effusion or thickening of the synovial membrane, as well as pain, stiffness and functional limitations. In diseases such as rheumatoid arthritis or psoriatic arthritis, synovitis is driven by complex cellular and molecular processes.
Better understanding discrepancies
At the same time, clinical examination, imaging, laboratory findings and patient-reported outcomes do not always fully correspond. "Such discrepancies are not measurement errors, but rather an expression of the multidimensional nature of joint disease," says Peter Mandl. "We need to understand that we are measuring different levels of the same disease – biological activity, structural changes and subjective perception. The concept of the synovial interface helps us to think about these levels together."
Integrative rather than isolated approach
Mandl therefore advocates integrative approaches that combine clinical examination, imaging, laboratory parameters and patient-reported outcomes. The aim is to assess disease activity not in isolation, but in the context of several dimensions.
Inflammatory rheumatic diseases such as rheumatoid arthritis, psoriatic arthritis and osteoarthritis affect millions of people worldwide. Synovitis is considered a central pathological feature of many of these diseases and is largely responsible for pain, loss of function and structural joint damage. A more precise and holistic assessment of inflammation is therefore an essential prerequisite for individualised treatment strategies. The concept of the synovial interface provides a structured framework for more differentiated care in inflammatory joint diseases.
Publication: Annals of Anatomy
The synovial interface: At the intersection from cells to humans.
Peter Mandl.
DOI: 10.1016/j.aanat.2026.152806
https://www.sciencedirect.com/science/article/pii/S0940960226000270