Pyrexia of unknown origin.
D000293:Adolescent; D000328:Adult; D000368:Aged; D003095:Collagen Diseases / Q000150:complications; D005260:Female; D005334:Fever / Q000209:etiology*; D006801:Humans; D007239:Infections / Q000150:complications; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000150:complications; D014652:Vascular Diseases / Q000150:complications