title: Relation between pathomorphological response in tumors after neoadjuvant chemotherapy and clinico-morphological and molecular prognostic factors in patients with breast cancer.
abstract: OBJECTIVE
  To determine the correlation between tumor pathomorphological response (PMR) after neoadjuvant chemotherapy (NACT) and clinico-morphological and molecular prognostic factors in patients with breast cancer (BC), and to determine the possible impact of the PMR and estrogen receptors (ER), progesterone receptors (PR) and Her-2/neu BC status on the disease course.
  
  
  METHODS
  The data from the medical history of patients on IIB stage (T2N1M0, T3N0M0) (n = 247), who received treatment with NACT, were used. The correlation between the parameters was determined using the Spearman's coefficient. Patient's survival was analyzed by Kaplan - Meier method. The association between PMR grades with the risk of disease relapse was estimated by Cox's regression analysis.
  
  
  RESULTS
  PMR grade correlated with tumor differentiation grade (rho = 0.38; p 0.05) and BC subtypes (rho = 0.05; p > 0.05). The patients with the same PMR grades didn't differ by the number of lymph node metastases (p > 0.05) and differed by the presence of embolus in tumor vessels (p 0.05). The risk of disease relapse depended on PMR grade: for grade 2-3 it was significantly decreased (HR = 0.71, 95% CI - 0.25-2.9, p = 0.0037), and for grade 4-5 it was the highest (HR = -1.23, 95% CI - 0.24-5.05, P = 0.0001), while 0-1 grade had no impact on the risk of disease relapse (HR = 0.22, 95% CI 0.08-0.38; p = 0.7).
  
  
  CONCLUSIONS
  The data of combined clinical, histological and immunohistochemical analysis have shown that PMR grades may serve as the criteria for individualization of adjuvant treatment of the patients with locally advanced BC.
authors.affiliation: R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology, NAS of Ukraine, Kiev03022, Ukraine. timovska79@gmail.com
authors.forename: Yu O
authors.initials: YO
authors.lastname: Timovska
authors.forename: V M
authors.initials: VM
authors.lastname: Pivnyuk
authors.forename: G P
authors.initials: GP
authors.lastname: Oliynichenko
authors.forename: M F
authors.initials: MF
authors.lastname: Anikushko
authors.forename: L M
authors.initials: LM
authors.lastname: Zachartseva
authors.forename: V F
authors.initials: VF
authors.lastname: Chekhun
mesh_terms: D000328:Adult; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000235:genetics / Q000473:pathology*; D003520:Cyclophosphamide / Q000008:administration & dosage; D018572:Disease-Free Survival; D004317:Doxorubicin / Q000008:administration & dosage; D005260:Female; D005472:Fluorouracil / Q000008:administration & dosage; D006801:Humans; D007150:Immunohistochemistry; D053208:Kaplan-Meier Estimate; D008207:Lymphatic Metastasis / Q000473:pathology; D008875:Middle Aged; D020360:Neoadjuvant Therapy; D011379:Prognosis; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000235:genetics / Q000378:metabolism; D011960:Receptors, Estrogen / Q000235:genetics / Q000378:metabolism; D011980:Receptors, Progesterone / Q000235:genetics / Q000378:metabolism; D012189:Retrospective Studies
chemical_list: D003520:Cyclophosphamide; D004317:Doxorubicin; D005472:Fluorouracil; D018719:Erb-b2 Receptor Tyrosine Kinases; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone