Seeing is believing. This is the title of a new campaign promoted by the International Agency for Prevention of Blindness to raise funds to help tackle avoidable loss of sight in poorly developed countries, truly an admirable initiative. This book could have used a similar leitmotiv: if you see what happens inside of a joint, you will be able to believe in your patient’s symptoms. But it would not be right. Arthroscopy is not out there just to make a diagnosis; it was not dev