title: [Predictive value of breast imaging report and database system (BIRADS) to detect cancer in a reference regional hospital].
abstract: BACKGROUND
  To validate the BIRADS in mammography, the calculation of its predictive value in each center is required, as recommended by the American College of Radiology.
  
  
  OBJECTIVE
  To determine the predictive value of the BIRADS system in our center.
  
  
  METHODS
  All ultrasound guided needle percutaneous biopsies, performed at our center between 2006 and 2010 were reviewed. Predictive value, sensitivity, specificity and diagnostic accuracy of BIRADS were calculated, with a confidence interval of 95%.
  
  
  RESULTS
  Of 1,313 biopsies available, 1,058 met the inclusion criteria. Fifty eight percent of biopsies were performed to women with mammographies classified as BIRADS 4 or 5. The presence of cancer in mammographies classified as BIRADS 0 was 4%. The prevalence of cancer for mammographies BIRADS 1, 2, 3, 4 and 5 were 0, 3, 2.7, 17.7 and 72.4% respectively. The positive and negative predictive values of BIRADS classification were 55 and 92 % respectively.
  
  
  CONCLUSIONS
  In our institution BIRADS classification 4 and 5 has a high positive predictive value for detecting cancer as in developed countries.
authors.forename: Enrique
authors.initials: E
authors.lastname: Bellolio
authors.forename: Viviana
authors.initials: V
authors.lastname: Pineda
authors.forename: María Eugenia
authors.initials: ME
authors.lastname: Burgos
authors.forename: M José
authors.initials: MJ
authors.lastname: Iriarte
authors.forename: Renato
authors.initials: R
authors.lastname: Becker
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Araya
authors.forename: Miguel
authors.initials: M
authors.lastname: Villaseca
authors.forename: Noldy
authors.initials: N
authors.lastname: Mardones
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle; D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D061705:Image-Guided Biopsy; D008327:Mammography; D008875:Middle Aged; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D055815:Young Adult