title: Frequency of Discordant Lesions and False-negative Cancers at Stereotactic Vacuum-assisted Biopsy.
abstract: This study aimed to determine frequency of discordant lesions and discordant false-negative cancers at stereotactic vacuum-assisted biopsy (SVAB).
  
  
  
  Institutional database was searched for discordant SVAB results between January 1, 2005 and December 31, 2012, in this retrospective institutional review board-approved Health Insurance Portability and Accountability Act-compliant study. Patient age, indication for initial mammogram, breast density, lesion size, Breast Imaging Reporting and Data System categorization, operator experience, biopsy needle gauge, biopsy histology, and final surgical histology of discordant lesions were collected and entered into a Microsoft Excel spreadsheet. Discordant rate and false-negative rates were calculated. Fisher exact test was used to assess prevalence of discordance using 11-Gauge needles versus 9-Gauge needles. Patient age, lesion Breast Imaging Reporting and Data System, operator days of experience, mammographic density, and lesion size were evaluated for association with false-negative discordant lesions using an exact Mann-Whitney U test.
  
  
  
  A total of 1861 SVABs were performed, 224 (12%) with an 11-Gauge VAB device and 1637 (88%) with a 9G Suros or Eviva device. Majority (1409 of 1861; 76%) of SVABs targeted calcifications. Twenty-three of 1861 (1.2%) discordant lesions were identified in 23 women. Seven of 23 (30%) discordant lesions were found to be cancers after final surgical pathology. Needle gauge was not associated with discordance. Operator experience was not associated with false-negative discordance.
  
  
  
  A relatively low discordance rate (1.2%) was observed. However, a high percentage (30%; range in literature 11.7%-53.8%) of our discordant lesions were false negatives. This study emphasizes the need for careful radiological-pathologic review after SVAB and for repeat biopsy or surgical excision in the setting of discordance.
authors.affiliation: NYU Langone School of Medicine, Laura and Isaac Perlmutter Cancer Center, 160 East 34th Street, 3rd Floor, New York, NY 10016. Electronic address: samantha.heller@nyumc.org.
authors.forename: Samantha L
authors.initials: SL
authors.lastname: Heller
authors.affiliation: NYU Langone School of Medicine, Laura and Isaac Perlmutter Cancer Center, 160 East 34th Street, 3rd Floor, New York, NY 10016.
authors.forename: Sonam
authors.initials: S
authors.lastname: Jaglan
authors.affiliation: NYU Langone School of Medicine, Laura and Isaac Perlmutter Cancer Center, 160 East 34th Street, 3rd Floor, New York, NY 10016.
authors.forename: James S
authors.initials: JS
authors.lastname: Babb
authors.affiliation: NYU Langone School of Medicine, Laura and Isaac Perlmutter Cancer Center, 160 East 34th Street, 3rd Floor, New York, NY 10016.
authors.forename: Amy
authors.initials: A
authors.lastname: Melsaether
authors.affiliation: NYU Langone School of Medicine, Laura and Isaac Perlmutter Cancer Center, 160 East 34th Street, 3rd Floor, New York, NY 10016.
authors.forename: Hildegard B
authors.initials: HB
authors.lastname: Toth
authors.affiliation: NYU Langone School of Medicine, Laura and Isaac Perlmutter Cancer Center, 160 East 34th Street, 3rd Floor, New York, NY 10016.
authors.forename: Linda
authors.initials: L
authors.lastname: Moy
mesh_terms: D000328:Adult; D000368:Aged; D001707:Biopsy, Needle / Q000379:methods; D001940:Breast / Q000000981:diagnostic imaging / Q000473:pathology; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D061705:Image-Guided Biopsy / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008327:Mammography / Q000379:methods*; D008875:Middle Aged; D015995:Prevalence; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013238:Stereotaxic Techniques; D014618:Vacuum
keywords: Stereotactic vacuum-assisted biopsy; discordance; false negatives; mammography