title: Localisation of occult breast lesion: a comparative analysis of hookwire and radioguided procedures.
abstract: OBJECTIVE
  For occult breast lesions, to retrospectively compare the performance of radioguided and hookwire methods in terms of ease of localisation and surgical procedures, and the ability to obtain a specimen with a clear margin.
  
  
  METHODS
  Retrospective study.
  
  
  METHODS
  Regional hospital, Hong Kong.
  
  
  METHODS
  All patients who underwent occult breast lesion localisation by either ultrasonography- or stereotactic-guided radioguided occult lesion localisation or hookwire localisation from August 2003 to December 2007 were included.
  
  
  METHODS
  Demographic data, localisation and operation procedure time, size of specimens and margin clearance.
  
  
  RESULTS
  In all, 165 patients (mean age, 52 years) having these procedures were assessed. In 98 instances, the procedure (hookwire=53, radioguided=45) was for diagnostic purposes and in 67 (hookwire=23, radioguided=44) for therapy. Both techniques attained a very high success rate (>95%). For radioguided occult lesion localisation, there was a significantly shorter mean localisation time than for hookwire localisation (18 min versus 31 min; P<0.001), while the mean operating time was similar. Radioguided occult lesion localisation entailed larger specimens and fewer cases with close or involved margins, or recourse to intra-operative re-excision or a second operation, but these differences were not statistically significant. Within the radioguided occult lesion localisation group, there were 42 patients who had a simultaneous sentinel lymph node biopsy (sentinel node and occult lesion localisation), with a 98% success rate although no lymph node metastasis was revealed.
  
  
  CONCLUSIONS
  Radioguided occult lesion localisation excels in yielding a much shorter localisation time and is as good as hookwire localisation in terms of specimen margin clearance and need for re-excision. It also offers the advantage of enabling simultaneous sentinel lymph node biopsy for invasive cancers. Therefore it is a recommended procedure that should be used more widely.
authors.affiliation: Department of Radiology, Kwong Wah Hospital, Kowloon, Hong Kong. tiffchu@hotmail.com
authors.forename: Tiffany Y C
authors.initials: TY
authors.lastname: Chu
authors.forename: C Y
authors.initials: CY
authors.lastname: Lui
authors.forename: W K
authors.initials: WK
authors.lastname: Hung
authors.forename: S K
authors.initials: SK
authors.lastname: Kei
authors.forename: Catherine L Y
authors.initials: CL
authors.lastname: Choi
authors.forename: H S
authors.initials: HS
authors.lastname: Lam
mesh_terms: D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D015412:Mastectomy, Segmental / Q000295:instrumentation / Q000379:methods*; D008875:Middle Aged; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D012086:Reoperation / Q000706:statistics & numerical data; D012189:Retrospective Studies; D021701:Sentinel Lymph Node Biopsy / Q000379:methods*; D013997:Time Factors
chemical_list: D019275:Radiopharmaceuticals