title: [C-reactive protein, Il-6 and procalcitonin as infection parameters in children with oncologic diseases].
abstract: BACKGROUND
  Due to anti-neoplastic therapy, there is a high incidence of infections and fever in pediatric patients with malignant disease. We have searched for parameters that may be of value in the early diagnosis of infection, in discriminating between bacterial and non-bacterial causes and for monitoring the response to antimicrobiotic therapy.
  
  
  METHODS
  46 febrile episodes in 33 children with malignant diseases under anti-neoplastic therapy, aged 0.5 to 17 years, were included. Each patient was supplied with a central venous catheter (Hickman catheter).
  
  
  METHODS
  Blood was taken for the evaluation of C-reactive-protein (CRP), Interleukin-6 (IL-6) and Procalcitonin (PCT). Laboratory data included WBC, blood cultures, as well as microbiologic and serologic tests for important infectious agents. Patients were grouped as follows: 1. Patients with febrile diseases and positive blood cultures, 2. Patients with localized bacterial or mycotic infections and negative blood cultures, 3. Patients with fever of unknown origin, 4. Patients with viral infections, 5. Control group.
  
  
  RESULTS
  CRP and IL-6 were more sensitive than PCT in detecting bacterial and mycotic diseases in leukopenic children, because of low PCT-levels in patients with localized infections. IL-6 values were high shortly after onset of fever and decreased under sufficient antimicrobiotic therapy until day three.
  
  
  CONCLUSIONS
  Because of the quick response, IL-6 may be helpful in monitoring antimicrobiotic therapy. Using Procalcitonin-levels, we were not able to distinguish between localized bacterial and viral infection in leukocytopenic patients.
authors.affiliation: 2. Klinik für Kinderheilkunde und Jugendmedizin, Klinikum Buch, Berlin.
authors.forename: L
authors.initials: L
authors.lastname: Bayer
authors.forename: M
authors.initials: M
authors.lastname: Schöntube
authors.forename: W
authors.initials: W
authors.lastname: Dörffel
mesh_terms: D000293:Adolescent; D001424:Bacterial Infections / Q000175:diagnosis* / Q000276:immunology; D002097:C-Reactive Protein / Q000378:metabolism*; D002116:Calcitonin / Q000097:blood*; D015740:Calcitonin Gene-Related Peptide; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007223:Infant; D015850:Interleukin-6 / Q000097:blood*; D007938:Leukemia / Q000276:immunology*; D008297:Male; D009181:Mycoses / Q000175:diagnosis / Q000276:immunology; D009369:Neoplasms / Q000276:immunology*; D009894:Opportunistic Infections / Q000175:diagnosis* / Q000276:immunology; D011237:Predictive Value of Tests; D011498:Protein Precursors / Q000097:blood*
chemical_list: C000606589:CALCA protein, human; D015850:Interleukin-6; D011498:Protein Precursors; D002116:Calcitonin; D002097:C-Reactive Protein; D015740:Calcitonin Gene-Related Peptide