title: [Predictive value of conventional immuno-histochemical biomarkers in breast cancer].
abstract: BACKGROUND
  Pathological complete response (pCR) after neoadjuvant chemotherapy (NCT) in breast cancer (BC) identifies patients with good prognosis.
  
  
  OBJECTIVE
  To assess if the clinico-pathological subtype, determined by classic immunohistochemical (IHC) markers, is able to predict pCR and prognosis in BC patients treated with NCT.
  
  
  METHODS
  One hundred thirty three BC patients aged 24-80 years, were treated with NCT. Clinico-pathological subtype was defined based on classic IHC markers. pCR was defined as the absence of invasive neoplastic cells in the breast and lymph nodes, on final breast surgery.
  
  
  RESULTS
  pCR was achieved in 8.2% of patients, 3.5 and 19.5% in luminal and hormonal receptor (HR) negative tumors respectively (p < 0.01). Median follow-up was 72.6 months (3.5-190). Patients who achieved pCR had higher overall survival (OS) (p = 0.04). A univariate analysis revealed that size of the tumor, ratio of metastatic to examined lymph nodes and absence of HR were significant predictors of pCR. These findings were not replicated in the multivariate analyses.
  
  
  CONCLUSIONS
  Clinico-pathological subtypes were independent prognostic factors for pCR and OS in BC patients in our cohort. These findings support using classic and cheap biomarkers as a predictive tool for NCT in BC.
authors.forename: Francisco
authors.initials: F
authors.lastname: Acevedo
authors.forename: Mauricio
authors.initials: M
authors.lastname: Camus
authors.forename: Catalina
authors.initials: C
authors.lastname: Vial
authors.forename: Sergio
authors.initials: S
authors.lastname: Panay
authors.forename: Marcelo
authors.initials: M
authors.lastname: Abarca
authors.forename: Francisco
authors.initials: F
authors.lastname: Domínguez
authors.forename: César
authors.initials: C
authors.lastname: Sánchez
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis*; D001943:Breast Neoplasms / Q000737:chemistry / Q000188:drug therapy / Q000401:mortality / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D020360:Neoadjuvant Therapy; D016133:Polymerase Chain Reaction; D011237:Predictive Value of Tests; D011379:Prognosis; D012189:Retrospective Studies; D016019:Survival Analysis; D047368:Tumor Burden; D055815:Young Adult
chemical_list: D014408:Biomarkers, Tumor