Possible causes of pyrexia of unknown origin(PUO)..
Shared by vikalp jain(NGMCian)...
INFECTIONS:-Bacterial:bacillary endocarditis and septicemia,collection of pus(subphrenic,intrahepatic,etc)
MALIGNANCY:-kidney nd liver,pancreas,lymphoma(hodgkin nd non hodgkin)..
AUTOIMMUNE DZS: SLE , PAN, rhumatoid arthritis..
GRANULOMAS: sarcoid,crohn dz...
IATROGENIC: Drug fever
NURSES,Doctors and all paramedical : factitious fever
ETC: remeber that the cause is more often a rare manifestation of a common dz den a common manifestation of rare dz