title: [Relationship of oncogene C-erbB-2 amplification in breast cancer with pathological parameters and disease free survival].
abstract: BACKGROUND
  Proto-oncogene c-erbB-2 is located in chromosome 17 region q21 and codifies a 185 Kd protein, with tyrosine kinase activity. The amplification of this gene is associated with relapse and lower survival in breast cancer. Overexpression of this gene can be detected by immunohistochemistry (IHC). However, fluorescence in situ hybridization (FISH) and chromogenic in situ hybridization (CISH) allow the simultaneous analysis of morphology and overexpression of the gene.
  
  
  OBJECTIVE
  To evaluate the relationship of c-erbB-2 oncogene amplification measured by FISH with histological graduation, presence of positive Iymph nodes and evolution of breast cancer.
  
  
  METHODS
  One hundred and ten tissue samples of invasive ductal or lobulillar breast cancer, positive for c-erbB-2 oncogene by IHC were analysed. The presence of c-erbB-2 oncogene amplification was subsequently analyzed by FISH.
  
  
  RESULTS
  There was a significant association of c-erbB-2 amplification by FISH with pathological graduation of the tumor, number of regional Iymph nodes involved and disease free survival.
  
  
  CONCLUSIONS
  Proto-oncogene c-erbB-2 amplification is a good indicator of bad prognosis in invasive breast cancer.
authors.affiliation: Unidad de Genética Médica, Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela. arojasa@cantv.net
authors.forename: Alicia E
authors.initials: AE
authors.lastname: Rojas-Atencio
authors.forename: Ivonne
authors.initials: I
authors.lastname: Valbuena
authors.forename: Karelis
authors.initials: K
authors.lastname: Urdaneta
authors.forename: Marisol
authors.initials: M
authors.lastname: Soto-Quintana
authors.forename: Francisco
authors.initials: F
authors.lastname: Alvarez-Nava
authors.forename: Leonardo
authors.initials: L
authors.lastname: González
authors.forename: María E
authors.initials: ME
authors.lastname: Viloria-Alvarado
authors.forename: Rita
authors.initials: R
authors.lastname: Quintero-Bellagamba
mesh_terms: D001943:Breast Neoplasms / Q000235:genetics* / Q000401:mortality / Q000473:pathology*; D018270:Carcinoma, Ductal, Breast / Q000235:genetics / Q000401:mortality / Q000473:pathology; D002677:Chile; D005260:Female; D005500:Follow-Up Studies; D005784:Gene Amplification; D018734:Genes, erbB-2 / Q000235:genetics*; D006801:Humans; D007150:Immunohistochemistry; D017404:In Situ Hybridization, Fluorescence; D009361:Neoplasm Invasiveness; D011379:Prognosis; D000090063:Proto-Oncogene Mas