Patellofemoral Syndrome - StatPearls - NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK557657/
WEBFeb 13, 2023 · Patellofemoral syndrome (PFS), also known as patellofemoral pain syndrome (PFPS) and runner's knee, is one of the most common causes of anterior knee pain encountered by clinicians. Patients typically complain of generalized anterior knee pain that is aggravated by loading a flexed knee, such as running, climbing stairs, and squatting.
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