knee pain concept photo. caucasian male holding both hands behind knee, which pierced acute sharp pain while sitting on edge of so

acl acute adult anterior arthritis both bursitis cap cartilage caucasian concept condition cruciate damage discomfort disease dislocation disorder displacement fluid fracture gout grinding hand harm hold idea illness inflammation instability joint knee kneecap ligament man medicine motion osteoarthritis pain patella pathology patient posterior rupture sharp sign sofa symptom trauma