A meniscal repair or arthroscopic meniscectomy is a surgical procedure to repair a torn meniscus via keyhole surgery. It involves removal of some or all of a meniscus from the tibio-femoral joint of the knee using arthroscopic (keyhole) surgery. The procedure can be a complete meniscectomy where the meniscus and the meniscal rim is removed or partial, where only a section of the meniscus is removed. This may vary from a minor trimming of a frayed edge to anything short of removing the rim. It is a minimally invasive procedure often undergone as an outpatient in a one-day clinic and is performed when a meniscal tear is too large to be corrected by a surgical repair of the meniscus. Factors affecting success include tear age, location and pattern, age of the patient, as well as any associated injuries.