title: Fever of unknown origin in 185 paediatric patients: a single-centre experience.
abstract: OBJECTIVE
  We conducted a prospective study to evaluate the causes and outcome in children with fever of unknown origin (FUO).
  
  
  METHODS
  From 1990 to 1999, 185 children with FUO were evaluated. Initial evaluation included routine haematological analysis, Epstein-Barr virus (EBV) serology, urine, stool or blood cultures, chest X-ray and tuberculin probe.
  
  
  RESULTS
  In 131 (70%) patients diagnosis was established, and 70 (37.8%) had infectious disease. EBV infection was the most common infection followed by visceral leishmaniasis (VL), urinary tract infection (UTI) and tuberculosis. Autoimmune disorders were diagnosed in 24 (12.9%), Kawasaki disease in 12 (6.4%), malignant diseases in 12 (6.4%) and miscellaneous conditions in 15 (8.1%) patients. In the remaining 54 (30%) patients, diagnosis was not established and most of them had self-limited disease. During the investigation, 26 (14%) patients developed serious organ dysfunction and five patients (two with virus-associated haemophagocytic syndrome, one with VL and two unknown) died.
  
  
  CONCLUSIONS
  The most important infectious causes of FUO in our study were EBV infection and VL. Kawasaki disease represented a significant cause of FUO at the beginning of our study because it was not recognized by primary-care physicians. We report myelodysplastic syndrome as another emerging cause of paediatric FUO. Repeated clinical examination and careful use of specific laboratory examinations, invasive diagnostic procedures or imaging are crucial in approaching paediatric FUO.
authors.affiliation: Department of Paediatric Immunology and Infectious Diseases, Mother and Child Health Institute Dr Vukan Cupić, Belgrade, Serbia and Montenegro. bg.pasic@eunet.yu
authors.forename: Srdjan
authors.initials: S
authors.lastname: Pasic
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Minic
authors.forename: Predrag
authors.initials: P
authors.lastname: Djuric
authors.forename: Dragan
authors.initials: D
authors.lastname: Micic
authors.forename: Milos
authors.initials: M
authors.lastname: Kuzmanovic
authors.forename: Ljudmila
authors.initials: L
authors.lastname: Sarjanovic
authors.forename: Milanka
authors.initials: M
authors.lastname: Markovic
mesh_terms: D000293:Adolescent; D001327:Autoimmune Diseases / Q000150:complications* / Q000175:diagnosis / Q000401:mortality; D002648:Child; D002675:Child, Preschool; D003141:Communicable Diseases / Q000150:complications* / Q000175:diagnosis / Q000401:mortality; D005260:Female; D005335:Fever of Unknown Origin / Q000209:etiology*; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D008297:Male; D009080:Mucocutaneous Lymph Node Syndrome / Q000150:complications* / Q000175:diagnosis / Q000401:mortality; D009369:Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000401:mortality; D017063:Outcome Assessment, Health Care; D011446:Prospective Studies; D015022:Yugoslavia