Book excerpt: Ideal for primary care practitioners who face the challenge of diagnosing their patients on the basis of undifferentiated and sometimes confusing presenting complaints, Taylor’s Differential Diagnosis Manual, Third Edition is a must-have for the busy practitioner. This handy guide fits inside a lab coat pocket and can be easily referenced within the time constraints of a brief office visit. Organized around common presenting symptoms, signs, laboratory, and imaging findings, this proven quick reference offers evidence-based guidelines on key questions to ask and what data to obtain to provide sound diagnoses of common problems. Fully updated with the latest clinical evidence and advances in clinical practice, this Third Edition includes more than 140 chapters packed with concise, easy-to read information on specific complaints in the areas of mental health; nervous system; vision; ear, nose, and throat; cardiovascular; respiratory; renal and urologic; female reproductive; musculoskeletal; dermatologic; and endocrine and metabolic problems. New chapters on abnormal mammogram, anticoagulation, bipolar disorder, corneal abrasion, dyspareunia, and loss of vision include the latest evidence-based diagnostic information.