title: Magnetic resonance-guided, vacuum-assisted breast biopsy: results from a European multicenter study of 538 lesions.
abstract: BACKGROUND
  The objective of this study was to determine the accuracy, reproducibility, and clinical value of magnetic resonance (MR)-guided, vacuum-assisted breast biopsy (MR-VAB) in a prospective, multicenter study.
  
  
  METHODS
  In 5 European centers, MR-VAB was performed or attempted on 538 suspicious lesions that were visible or could targeted only by MR imaging (MRI). Verification of malignant or borderline lesions included reexcision of the biopsy cavity. Benign biopsy results were verified by retrospective correlation of histology with preinterventional and postinterventional MRI studies. Follow-up of 24-48 months (median, 32 months) was available for 491 of 538 patients.
  
  
  RESULTS
  MR-VAB was unsuccessful or was not completed in 21 of 538 patients, for which an immediate repeat biopsy was recommended. Five hundred seventeen of 538 performed VAB procedures (96%) were successful. Histology yielded 138 (27%) malignancies, 17 (3%) atypical ductal hyperplasias, and 362 (70%) benign entities. No false-negative diagnoses occurred among the 517 successful MR-VAB procedures. The positive predictive value of VAB depended on patient preselection, which differed according to the indication for the initial MRI study.
  
  
  CONCLUSIONS
  The results of this study indicated that MR-VAB offers excellent accuracy. Small lesion size did not prove to be a limitation.
authors.affiliation: Department of Breast Imaging and Intervention; Radiology, Klinikum Rechts der Isar, Technical University Munich, Germany. claudia.perlet@med.uni-muenchen.de
authors.forename: Claudia
authors.initials: C
authors.lastname: Perlet
authors.forename: Sylvia H
authors.initials: SH
authors.lastname: Heywang-Kobrunner
authors.forename: Anke
authors.initials: A
authors.lastname: Heinig
authors.forename: Harald
authors.initials: H
authors.lastname: Sittek
authors.forename: Jan
authors.initials: J
authors.lastname: Casselman
authors.forename: Ingvar
authors.initials: I
authors.lastname: Anderson
authors.forename: Patrick
authors.initials: P
authors.lastname: Taourel
mesh_terms: D001706:Biopsy / Q000379:methods; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D011237:Predictive Value of Tests; D011446:Prospective Studies; D015203:Reproducibility of Results; D012189:Retrospective Studies; D014618:Vacuum