If an MRI knee scan identifies a meniscal tear; what factors are taken into consideration to send for arthroscopy? If the scan has been generated from a GP referral: is there vetting to decide urgent or routine orthopaedic appointment from the results and onward freferral? Does it matter what type of tear? Do certain tears warrant more immediate intervention? If the scan also shows OA / degeneration, how much does that affect the decision to go ahead with a scope?