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[Fever of unknown origin: 1. Etiology. A prospective multicenter study of 164 patients].

Cristian Băicuş, H D Boloşiu, C Tănăsescu, Anda Băicuș

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Abstract

BACKGROUND: The spectrum of fever of unknown origin seems to be determined by geographic and economic factors, and it appears to change in time. Excepting a small retrospective study, no other study on fever of unknown origin has been performed in Central or Eastern Europe. METHODS: A multicenter cohort study was carried out on 164 consecutive patients who met the classic, modified criteria of fever of unknown origin. The study lasted 2 years (1997-1998) and included a follow-up period of another 2 years. MAIN OUTCOME MEASURED: The final diagnosis at the end of follow-up. RESULTS: 74 (45%) patients had infections (tuberculosis: 27 patients, 16%), 41 patients (25%) had neoplasms, 30 (18%) had non-infectious inflammatory diseases, three (2%) drug fever, and four (2%) other causes. The etiology remained obscure for 12 patients (7%). CONCLUSIONS: Infections represent the most important etiology, among them predominating tuberculosis.

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BACKGROUND: The spectrum of fever of unknown origin seems to be determined by geographic and economic factors, and it appears to change in time. Excepting a small retrospective study, no other study on fever of unknown origin has been performed in Central or Eastern Europe. METHODS: A multicenter cohort study was carried out on 164 consecutive patients who met the classic, modified criteria of fever of unknown origin. The study lasted 2 years (1997-1998) and included a follow-up period of another 2 years. MAIN OUTCOME MEASURED: The final diagnosis at the end of follow-up. RESULTS: 74 (45%) patients had infections (tuberculosis: 27 patients, 16%), 41 patients (25%) had neoplasms, 30 (18%) had non-infectious inflammatory diseases, three (2%) drug fever, and four (2%) other causes. The etiology remained obscure for 12 patients (7%). CONCLUSIONS: Infections represent the most important etiology, among them predominating tuberculosis.

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Available abstract

BACKGROUND: The spectrum of fever of unknown origin seems to be determined by geographic and economic factors, and it appears to change in time. Excepting a small retrospective study, no other study on fever of unknown origin has been performed in Central or Eastern Europe. METHODS: A multicenter cohort study was carried out on 164 consecutive patients who met the classic, modified criteria of fever of unknown origin. The study lasted 2 years (1997-1998) and included a follow-up period of another 2 years. MAIN OUTCOME MEASURED: The final diagnosis at the end of follow-up. RESULTS: 74 (45%) patients had infections (tuberculosis: 27 patients, 16%), 41 patients (25%) had neoplasms, 30 (18%) had non-infectious inflammatory diseases, three (2%) drug fever, and four (2%) other causes. The etiology remained obscure for 12 patients (7%). CONCLUSIONS: Infections represent the most important etiology, among them predominating tuberculosis.

Key concepts: Etiology, Fever of unknown origin, Medicine, Tuberculosis, Prospective cohort study, Retrospective cohort study, Pediatrics, Internal medicine

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