This book's approacti is to assume the typical anesthesia scenario, namely a patient who arrives already carrying a diagnosis, rather than a patient with a constellation of signs and symptoms in search of a unifying diagnosis. Because of this, we have not used excessive space addressing the exact incidences of various findings. We subscribe to the school that says that if a finding is present in your patient, the incidence is 100%. We have elected to include all findings of the syndrome, even if uncommon, although we have tried to indicate when such findings are uncommon or rare, typically by the use of "may have" or the more grammatically correct "can have." Because of the small number of patients with certain uncommon syndromes, it can be hard to separate findings due to the syndrome and findings that were merely coincidental.