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Fever of unknown origin

1 - University of Medicine and Pharmacy „Carol Davila“, Bucharest, Romania

2 - Clinical Emergency Hospital of Bucharest, Bucharest, Romania

3 - Medical Center As-AIDE Sante, Bucharest, Romania

4 - Universitary Emergency Central Military Hospital, Academy of Romanian Scientists, Bucharest, Romania

5 - Department of Visceral Surgery, “Fundeni” Clinical Institute, Bucharest, Romania

6 - Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania

Correspondence: Camelia C. Diaconu

Received: March 25, 2020

Accepted: August 23, 2020

Abstract:

Fever of unknown origin (FUO) is a diagnosis that describes a prolonged febrile illness without an established cause, despite investigations. From the first definition of the medical condition (given by Petersdorf and Beeson in 1961) the diagnostic criteria have changed over time, intending to improve the management and outcome of these patients. The main causes of FUO fall into 4 categories: infectious, non-infectious (inflammatory), neoplastic and diverse causes. The etiology of FUO has changed over time, due to ever-changing disease patterns and the development of diagnostic techniques. A significant percentage of patients with FUO remain without an etiologic diagnosis, despite advanced diagnostic tests. Gathering potentially diagnostic clues through history, physical examination and nonspecific key paraclinical abnormalities is the basis for the diagnosis of FUO.

Keywords:

Fever of unknown origin

Cite this article

APA Style

Gheorghe, G., Ceobanu, G., Gheorghe, F., Bratu, O.G., Bacalbasa, N., Bungau, S., & Diaconu, C.C. (2025). Fever of unknown origin. Romanian Journal of Military Medicine, 123(3), 213-218.

Vancouver Style

Gheorghe G, Ceobanu G, Gheorghe F, Bratu OG, Bacalbasa N, Bungau S, et al. Fever of unknown origin. Rom J Mil Med. 2025;123(3):213-218.

Harvard Style

Gheorghe, G., Ceobanu, G., Gheorghe, F., Bratu, O.G., Bacalbasa, N., Bungau, S. & Diaconu, C.C. 2025, 'Fever of unknown origin', Romanian Journal of Military Medicine, vol. 123, no. 3, pp. 213-218.