Mechanistic Study of CD90-Positive Synovial Fibroblasts in the Invasion and Recurrence of Pigmented Villonodular Synovitis

This study elucidates the structure of the PVNS synovium compared to OA synovium and highlights the crucial role of CD90+PDPN+ FLSs in synovial invasion and bone resorption. These findings may lead to updated treatment concepts for PVNS and reveal new therapeutic targets. This study opens promising avenues for developing targeted therapeutic strategies aimed at inhibiting the invasive and osteoclastogenic functions of CD90+PDPN+ FLSs in PVNS. Future research should focus on validating these cells as potential therapeutic targets, possibly through the use of selective inhibitors, which could help mitigate synovial hyperplasia and bone destruction in affected patients.