9 randomized controlled trials were included in a 'benefits' analysis, and 2 RCTs and 7 observational/registry studies in a 'harms' analysis comparing arthroscopic interventions for a meniscus tear, both in the presence and absence of radiographic evidence of osteoarthritis, to control interventions. In the 'benefits' analysis, the pooled results demonstrated a slight benefit of arthroscopy for patient-reported pain at 3 and 6 months compared to control, but not at 12, 18, and 24 months after surgery. Effects on patient-reported function were insignificant. In the 'harms' analysis, adverse events that were noted with arthroscopy included deep vein thrombosis, pulmonary embolism, and infection.