title: [Ultrasound-guided core needle biopsy for the diagnosis of fibroepithelial breast tumors].
abstract: OBJECTIVE
  to evaluate the concordance rate of ultrasound-guided core needle biopsy followed by excisional biopsy in palpable breast lumps, suggestive of fibroepithelial tumors.
  
  
  METHODS
  a retrospective study included 70 biopsies with a histological diagnosis of fibroepithelial tumor in 67 out of 531 patients with breast lesions submitted to ultrasound-guided core needle biopsy with a high frequency (7.5 MHz) linear transducer, using an automatic Bard-Magnum gun and a 14-gauge needle. Cases with a diagnosis of fibroepithelial tumor by core needle biopsy or excisional biopsy and with a diagnosis of fibrosclerosis were included in the study. The agreement between the two biopsy methods was assessed using the Kappa coefficient.
  
  
  RESULTS
  excisional biopsy revealed 40 cases of fibroadenoma (57.1%), 19 cases of phyllodes tumor (27.2%), and 11 cases of fibrosclerosis (15.7%). The concordance rate for fibroadenoma was substantial (k = 0.68, 95%CI = 0.45 - 0.91), almost perfect for the phyllodes tumor (k = 0.81, 95%CI = 0.57 - 1.0), and moderate for fibrosclerosis (k = 0.58, 95%CI = 0.36 - 0.90).
  
  
  CONCLUSIONS
  the core needle biopsy is a minimally invasive method that has "substantial" to "almost perfect" concordance rate with excisional biopsy. Fibrosclerosis should be considered in the differential diagnosis of fibroepithelial tumors.
authors.affiliation: Setor de Mastologia, Disciplina de Ginecologia, Universidade de São Paulo, Brasil. desiderion@uol.com.br
authors.forename: Marcos Desidério
authors.initials: MD
authors.lastname: Ricci
authors.forename: Paulo Gustavo Tenório do
authors.initials: PG
authors.lastname: Amaral
authors.forename: Denis Seiiti
authors.initials: DS
authors.lastname: Aoki
authors.forename: Hélio Rubens de
authors.initials: HR
authors.lastname: Oliveira Filho
authors.forename: Walter da Silva
authors.initials: Wda S
authors.lastname: Pinheiro
authors.forename: José Roberto
authors.initials: JR
authors.lastname: Filassi
authors.forename: Edmund Chada
authors.initials: EC
authors.lastname: Baracat
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001707:Biopsy, Needle / Q000379:methods; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D018225:Neoplasms, Fibroepithelial / Q000000981:diagnostic imaging / Q000473:pathology*; D012189:Retrospective Studies; D018084:Ultrasonography, Interventional; D055815:Young Adult