A recent study involving 101 patients used fluorescence optical imaging (FOI) with indocyanine green to differentiate psoriatic arthritis (PsA) from erosive hand osteoarthritis (EHOA). Patients with EHOA exhibited stronger joint enhancement in finger joints compared to those with PsA, who displayed a unique imaging pattern. The study revealed that the Werner sign, a specific triangular enhancement, was more prevalent in PsA cases. FOI showed substantial reliability in diagnosing joint conditions, providing measurable differences despite some diagnostic overlap.

Source: Frontiers in Medicine