title: Fever of unknown origin: a follow-up investigation of 34 patients.
abstract: 34 patients hospitalized for fever of unknown origin (FUO) were subjected to a follow-up investigation on the average 5 yr after the hospital stay. Two patients had died of a disease related to FUO: one had adenocarcinoma with an unknown primary site and the other a supposed autoimmune disease. In one case the cause of FUO was a periappendicular abscess. A woman continued to have periods of fever with high ESR. In the remaining 30 cases the cause of FUO had apparently been a self-limited, benign disease. In contrast to an earlier series from our clinic, no cases of tuberculosis were revealed.
mesh_terms: D000038:Abscess / Q000150:complications; D000230:Adenocarcinoma / Q000150:complications / Q000556:secondary; D000293:Adolescent; D000328:Adult; D000368:Aged; D001065:Appendix; D002277:Carcinoma / Q000150:complications; D002429:Cecal Diseases / Q000150:complications; D003718:Denmark; D005260:Female; D005335:Fever of Unknown Origin / Q000453:epidemiology / Q000209:etiology*; D005387:Finland; D005500:Follow-Up Studies; D006801:Humans; D008113:Liver Neoplasms / Q000150:complications / Q000556:secondary; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology