This book covers pathophysiology of fever, the general approach to the febrile patient, and offers a systematic, in-depth discussion regarding the differential diagnosis of unexplained fever. The authors define an unexplained fever as a fever which lasts a minimum of 14 days and whose etiology is not known. This one-of-a-kind publication highlights the main causes of fever, specifically infectious diseases, cancer, connective tissue diseases, various rare disorders, plus etiologies which are often ignored. Also, laboratory and medical imaging techniques for diagnosing fevers are included....