In patient safety and risk management circles, wrong-site surgery is considered one of the "never events." Healthcare industry observers estimate, however, that as many as 4,000 wrong-site, wrong-patient or wrong-procedure incidents occur each year, not to mention an incalculable number of near-misses. Four examples of wrong-site surgeries, adapted from actual incidents, are described below. After each scenario, experts offer their views on what went wrong and what would have been the right thing to do.?