title: [A new method of complete peripheral margin assessment in breast conservative surgery using an adjustable polygonal prism mould].
abstract: Conventional margin evaluation for breast conservative surgery is usually based on the sections taken perpendicular to the inked margins and has difficulty in completeness. We have developed a new method using an adjustable mould during fixation so that the three-dimensional specimen is fixed in the shape of polygonal prism. The new method enables us to assess peripheral margins completely by examining the inner surfaces of the marginal slices cut parallel to the flat peripheral margins of the specimen.
  
  
  METHODS
  We have applied the new method to 59 invasive carcinomas and 10 noninvasive carcinomas of the breast, which were judged to be negative for residual tumor by conventional inked margin on the section cut through the center of the tumor.
  
  
  RESULTS
  The new method detected 13(22.0%) and 3(30.0%) cases with positive margins in 59 invasive carcinomas and 10 noninvasive carcinomas of the breast, respectively. Nine of 13(69.2%) positive margins in invasive carcinomas were due to the intraductal components of the carcinomas.
  
  
  CONCLUSIONS
  The polygon method is superior to the conventional inked margin method in sensitivity. Furthermore, it covered all the peripheral margins and pinpointed the positive sites.
authors.affiliation: Department of Pathology, Nagoya National Hospital, Nagoya 460-0001.
authors.forename: Shu
authors.initials: S
authors.lastname: Ichihara
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Mori
authors.forename: Suzuko
authors.initials: S
authors.lastname: Moritani
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Sato
mesh_terms: D001940:Breast; D001943:Breast Neoplasms / Q000473:pathology / Q000601:surgery*; D018270:Carcinoma, Ductal, Breast / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D015412:Mastectomy, Segmental / Q000379:methods*; D016707:Tissue Fixation / Q000379:methods*