Reliability: refers to the reproducibility or concordance between the findingsof two examiners (interobserver reliabilityI or the findings from repeated examinationsperformed by the same observer (intraobserver reliability); this isan index of the degree of confidence and diagnostic certainty that can beplaced in a finding; sources contributing to unreliability relate to the examiner,the patient, and the examination settingRoutine or screening physical examination: once advocated to be doneannually for maintaining health and preventing illness; the utility of physicalexamination components has been critically assessed, and various health organizationshave recommended the components of and the frequency withwhich these examinations should be performed (see Table I-I ).AS is a second-year medical student who is visiting her parents during the winterbreak, While at home, two events occur that make AS wonder if what shehas learned in medical school applies to the "real" world. First, she is unable toanswer her mother's question about whether she needs a "complete" check-upand what procedures she should expect the physician to do, Then, whiledemonstrating her diagnostic equipment, AS cannot hear a murmur that her16-year-old sister asks her to examine. Her sister~ pediatrician noted a murmuryears ago during a sports physical examination, and the sister wants to knowif it is still present. "So, how do you put this case together?" is a question we have asked countless medical studentsand house officers. Interpreting a patient's medical history and physical findings,synthesizing information, and arriving at a working diagnosis are critical skills for physicians.As medical students move into their clerkship experiences, they are expected to reordertheir disease-focused learning and apply it to patients presenting with undiagnosedproblems--problems that often relate to several organ systems and the interaction of differentillnesses. This book results from more than fifteen years of teaching physical diagnosisand helping students make the transition from disease-oriented pathophysiology and mechanicalpatient evaluation skills to assessment of patients.