title: [Ultrasound guided core biopsy for breast lesions using 16G needle].
abstract: OBJECTIVE
  The objective of this study was to develop a standard diagnostic evaluation with 16G core-needle biopsy for breast lesions. We evaluated the ideal number of fragments using standard ultrasound criteria based on the previous results obtained on the size of the lesions.
  
  
  METHODS
  A prospective study was carried out, from may 2004 to September 2005, in 79 patients with lesions that included categories 2,3,4 and 5, according to BIRADS -USTM using 16G core biopsy needle. We took up 5 pieces numbered and placed individually in vials with 10% formalin.
  
  
  RESULTS
  In 84 biopsies performed there were 81 conclusive diagnoses (96%), with 43 malignant results (51%) and 38 benign results (45%). The effectiveness of the core biopsy increased with the sample numbers: one sample is 95.24% accurate; two samples reach 96.93%; three samples reach 98.8%; four samples reach 98.81%, and finally, five samples reach 100% accuracy.
  
  
  CONCLUSIONS
  the resection of three fragments was sufficient for a satisfactory result.
authors.affiliation: Pós-Graduação em Ginecologia da Santa Casa da Misericórdia do Rio de Janeiro, RJ, BR. elizabeth.martins@uol.com.br
authors.forename: Elizabeth Costa
authors.initials: EC
authors.lastname: Martins
authors.forename: Alkindar
authors.initials: A
authors.lastname: Soares
authors.forename: Carlos Marques
authors.initials: CM
authors.lastname: Guimarães
authors.forename: Maria de Nazaré Bastos da Serra
authors.initials: Mde N
authors.lastname: Freire
authors.forename: Hilton
authors.initials: H
authors.lastname: Koch
authors.forename: Martha
authors.initials: M
authors.lastname: Marsillac
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle; D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008875:Middle Aged; D009339:Needles; D011446:Prospective Studies; D018084:Ultrasonography, Interventional; D055815:Young Adult