title: Axillary lymph node core biopsy for breast cancer metastases -- how many needle passes are enough?
abstract: OBJECTIVE
  To determine the diagnostic yield of each of three core passes when sampling abnormal lymph nodes in patients presenting with breast cancer.
  
  
  METHODS
  All patients suspected of having breast cancer had axillary ultrasound as part of initial assessment. Radiologically abnormal nodes (cortical thickness >2.3mm or round shape) were biopsied with three passes of a 22 mm throw 14 G core biopsy needle and sent for histopathology in separate numbered pots. Data were collected prospectively, and analysis performed on the data of 55 consecutive patients who had positive nodes on at least one core biopsy needle pass.
  
  
  RESULTS
  Of 55 patients with a positive node on core biopsy, tumour was noted in all three cores taken in 39 (70.9%). Lymph node metastasis was detected in 45 (81.8%) first core biopsies. With the first two cores taken, positive results were detected in 53 of 55 cases (96.4%). In both cases where tumour was only found on a third core biopsy pass, no lymph node tissue was present in the first two biopsy passes.
  
  
  CONCLUSIONS
  Two well-directed 14 G core biopsy samples from an abnormal axillary node are adequate for diagnosis of breast cancer metastasis.
authors: Department of Breast Surgery, Ninewells Hospital and Medical School, Dundee DD1 9SY, UK. ejanemacaskill@nhs.net
authors: E J
authors: EJ
authors: Macaskill
authors: C A
authors: CA
authors: Purdie
authors: L B
authors: LB
authors: Jordan
authors: D
authors: D
authors: Mclean
authors: P
authors: P
authors: Whelehan
authors: D C
authors: DC
authors: Brown
authors: A
authors: A
authors: Evans
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001365:Axilla; D001707:Biopsy, Needle / Q000379:methods*; D001943:Breast Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D015203:Reproducibility of Results