Laboratory medicine is the branch of medicine in which specimens of tissue, fluid, or other bodysubstance are examined outside of the person, usually in the laboratory. Pathology is the field oflaboratory medicine. Pathology is a significant field in modern medical diagnosis and medical research,concerned mainly with the causal study of disease, whether caused by pathogens or non-infectiousphysiological disorder. 70 percent of all medical decisions rely on diagnostic and prognosticinformation provided by pathologists. This book provides in-depth knowledge of laboratory medicine.The uniqueness of this book is its special references on techniques and procedures that are used in thepathology and medicine. This book will be highly beneficial to students, teachers and research workersof this field. This book consists of contributions made by international experts. This book providespractical guidelines to the management and diagnosis of patients requiring medical attention. Thisbook is to help the physicians and students so that they can understand well this field of medicine. Mainaim of this book is to provide a mature approach to basic principles of this field.