Abstract
Purpose: Infrapatellar fat pad (IPFP) plays several biomechanical roles such as stabilizing patella, improving efficiency of extensor mechanism. Recently, IPFP has been received attention in pathophysiology of knee osteoarthritis (OA). However, it is unknown how IPFP changes as knee OA progresses. In addition, IPFP is nerve-rich tissue. Although previous reports indicate that IPFP is the source of pain, the characteristics of IPFP in patients with knee OA with anterior knee pain are often unclear.
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