The efficacy of partial meniscectomies in patients with osteoarthritis is currently debated. The purpose of this study is to determine the effectiveness of a novel physical exam maneuver, the Portland Pivot Kick (PPK), in predicting the potential benefit of arthroscopic partial medial meniscectomy in treating mechanical symptoms, even in the presence of osteoarthritis. We theorize that differentiating mechanical symptoms from degenerative joint disease in medial meniscus tears can be a prognosticator of improvement following surgical intervention. We hypothesize that patients with a positive preoperative PPK will have improvement of mechanical symptoms and subjective outcomes scores following arthroscopic partial medial meniscectomy.