title: Large-core biopsy guns: comparison for yield of breast tissue.
abstract: OBJECTIVE
  To compare seven large-core, long-throw, 14-gauge biopsy guns for yield and quality of breast tissue obtained.
  
  
  METHODS
  A two-phase, randomized and blinded study was performed. In the first phase, four fully automated 14-gauge biopsy guns (BIP, Manan, Biopsy, and ASAP) and one semiautomated device (Temno) were used to obtain breast cores from a cadaver. Samples were assessed for volume, number of fragments, and crush artifact. In the second phase, seven biopsy guns (previously mentioned guns plus Monopty and Ultra-Cut guns) were used to obtain cores from a breast parenchyma model. These cores were then evaluated for weight, volume, and number of fragments.
  
  
  RESULTS
  The mean specimen volume of cadaveric breast tissue obtained was 17.9 mm3 for the BIP gun, 17.8 for the Manan gun, 14.9 for the Biopsy gun, 14.1 for the ASAP gun, and 9.9 for the Temno gun. The Temno gun obtained statistically significantly smaller volumes than all other guns. For the breast parenchyma model, mean obtained volumes were 24.5, 24.1, 16.2, 21.7, 17.5, 20.0, and 15.2 mm3, respectively. The BIP and Manan guns yielded statistically significantly larger cores than all other guns except the ASAP.
  
  
  CONCLUSIONS
  Yields of breast tissue provided by each biopsy device differed statistically significantly. BIP and Manan biopsy guns yielded the greatest volume of core tissue, which may facilitate histopathologic diagnosis from breast biopsies performed with imaging guidance.
authors.affiliation: Department of Radiology, University of Maryland School of Medicine, Baltimore 21201, USA.
authors.forename: T L
authors.initials: TL
authors.lastname: Krebs
authors.forename: W A
authors.initials: WA
authors.lastname: Berg
authors.forename: M J
authors.initials: MJ
authors.lastname: Severson
authors.forename: L S
authors.initials: LS
authors.lastname: Magder
authors.forename: P A
authors.initials: PA
authors.lastname: Goldberg
authors.forename: C
authors.initials: C
authors.lastname: Campassi
authors.forename: C C
authors.initials: CC
authors.lastname: Sun
mesh_terms: D000818:Animals; D001707:Biopsy, Needle / Q000295:instrumentation*; D001940:Breast / Q000473:pathology*; D002102:Cadaver; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008460:Meat; D014422:Turkeys