title: Nucleolar organizer regions in breast cytology material.
abstract: OBJECTIVE
  To evaluate the presence of nucleolar organizer regions (NORs) by the argyrophil NOR (AgNOR) technique on scrape cytology on breast lumps.
  
  
  METHODS
  The study group consisted of 112 breast lumps that were sent for frozen section and included fibrocystic disease (52 cases), fibroadenomas (15 cases) and carcinomas (45 cases). Scrape cytology was performed on each case, and the number of AgNOR dots was recorded for 50 cells and the mean value calculated.
  
  
  RESULTS
  The mean AgNOR counts were statistically significantly higher in malignant lesions in comparison to either fibroadenomas or fibrocystic changes.
  
  
  CONCLUSIONS
  The AgNOR technique could be of use in cytologic material as an adjunct to fine needle aspiration of breast lesions.
authors.affiliation: Department of Pathology, Hasharon Hospital, Golda Medical Center, Petah Tiqva, Israel.
authors.forename: L
authors.initials: L
authors.lastname: Rath-Wolfson
authors.forename: I
authors.initials: I
authors.lastname: Hamel
authors.forename: M
authors.initials: M
authors.lastname: Halpern
authors.forename: B
authors.initials: B
authors.lastname: Klein
authors.forename: R
authors.initials: R
authors.lastname: Gal
mesh_terms: D001943:Breast Neoplasms / Q000175:diagnosis* / Q000473:pathology; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D009697:Nucleolus Organizer Region / Q000473:pathology*; D016622:Silver Staining / Q000379:methods*