Causes of Fever of Unknown Origin (FUO) - Differential Diagnosis Algorithm Neoplasm: • NHL • Hodgkin's lymphoma • Leukemia • Solid tumors Autoimmune: • SLE • Polyarteritis nodosum • Giant cell arteritis • Sarcoidosis Other: • Drug fever • Factitious fever • Trauma Non-infectious hepatitis • Recurrent PE Bacterial - Organ Specific Infection • Infectious endocarditis • Osteomyelitis • Occult abscess • Sinusitis • Cholangitis • UTI • Meningitis Bacterial - Non-organ specific • Brucellosis • Q-fever • Salmonella • Yersinia • Tuleremia • Septic Phlebitis • Rheumatic fever • Lyme disease • Whipple's disease Viral Infection: • HIV • EBV • CMV • Viral hepatitis • Enterovirus Other Infection: • Fungal • Protozoa (eg. malaria) • other parasites #Fever #UnknownOrigin #FUO #Chronic #Differential #Diagnosis #Algorithm #causes
