title: Benign breast lesions: minimally invasive vacuum-assisted biopsy with 11-gauge needles patient acceptance and effect on follow-up imaging findings.
abstract: OBJECTIVE
  To evaluate patient acceptance of stereotactic or ultrasonographically (US) guided directional vacuum-assisted 11-gauge needle biopsy of breast lesions and short- and long-term changes at mammography and US resulting from the procedure.
  
  
  METHODS
  For 91 benign lesions that had been sampled at either stereotactic or US-guided directional vacuum-assisted breast biopsy performed with 11-gauge needles, clinical, mammographic, and US changes were evaluated 1 week after biopsy; 6-month follow-up findings were available for 74 lesions. The subjective outcome of the procedure and patient satisfaction were assessed on the basis of a patient-completed questionnaire that incorporated a multistage scoring system. Statistical analysis of scores for condition for both biopsy methods was performed with the chi2 test.
  
  
  RESULTS
  Adverse events occurred during the procedure in four patients. Clinically visible hematomas were observed at 1-week follow-up in 79% of patients. Densities were observed on mammograms in 46% of patients 1 week after biopsy; hematomas with a maximum diameter of 2 cm were seen on sonograms in 74%. Six months after biopsy, mammography revealed discrete architectural changes in one case. No abnormalities were found at 6-month follow-up US. Fifteen patients had various complaints during the procedure; six reported feeling constrained during the first few days after biopsy, and one patient was not satisfied with the cosmetic result. No patient reported a retrospective preference for surgical biopsy instead of directional vacuum-assisted biopsy. Analysis of scores for the stereotactic and US-guided methods revealed a significant difference (P <.001) in favor of the stereotactic method for condition during biopsy, while scores for condition in the first days after biopsy were more equally distributed between the two methods (P =.386).
  
  
  CONCLUSIONS
  Directional vacuum-assisted 11-gauge needle biopsy of the breast is well accepted by patients and rarely produces changes that may alter the mammographic or sonographic appearance of the breast at 6-month follow-up.
authors.affiliation: Departments of Radiology and Obstetrics and Gynecology, Lainz Hospital, Wolkersbergenstrasse 1, 1130 Vienna, Austria. s.pankl@telering.at
authors.forename: Sabine
authors.initials: S
authors.lastname: Huber
authors.forename: Monika
authors.initials: M
authors.lastname: Wagner
authors.forename: Michael
authors.initials: M
authors.lastname: Medl
authors.forename: Heinrich
authors.initials: H
authors.lastname: Czembirek
mesh_terms: D000328:Adult; D000368:Aged; D001707:Biopsy, Needle / Q000379:methods*; D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D016009:Chi-Square Distribution; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008327:Mammography; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D010342:Patient Acceptance of Health Care; D011183:Postoperative Complications; D013238:Stereotaxic Techniques; D011795:Surveys and Questionnaires; D018084:Ultrasonography, Interventional; D016217:Ultrasonography, Mammary; D014618:Vacuum