title: [Concordance between preoperative and definitive study in endometrial cancer].
abstract: BACKGROUND
  Some studies have been realized to know the concordance level between the preoperative and the diagnosis of endometrial cancer and it has been observed that there is a tendency to undergrade the stage of cancer in preoperative studies.
  
  
  METHODS
  It was carried out an observational, retrolective, transversal and comparative study to establish the concordance between the preoperative and the definitive study in endometrial cancer. We revised the records of the Pathology department of the Hospital "Luis Castelazo Ayala" from January 1st, 2012, to December 31th, 2014. The concordance was calculated by using the Cohen's kappa coefficient and the force scale of concordance proposed by Byrt, and the test of comparison of two proportions.
  
  
  RESULTS
  We observed a low concordance between the preoperative and the definitive study regarding the histologic variety (kappa = 0.258, p = 0.000) and the degree of differentiation (kappa = 0.220, p = 0.001). These differences were statistically significant for the moderate grade degree of differentiation (Z = -3.409, p < 0.05).
  
  
  CONCLUSIONS
  There is a low level of concordance between the preoperative and the definitive study in the diagnosis of endometrial cancer.
authors.affiliation: Servicio de Laparoscopia Ginecológica, Hospital de Ginecoobstetricia 4 "Luis Castelazo Ayala", Instituto Mexicano del Seguro Social, Ciudad de México, México. betania_14@hotmail.com.
authors.forename: Betania
authors.initials: B
authors.lastname: Mazón-González
authors.forename: Víctor Alberto
authors.initials: VA
authors.lastname: Olguín-Cruces
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001706:Biopsy; D003430:Cross-Sectional Studies; D016889:Endometrial Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D004717:Endometrium / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D007044:Hysterectomy; D008875:Middle Aged; D060787:Neoplasm Grading; D009361:Neoplasm Invasiveness; D011300:Preoperative Care; D012189:Retrospective Studies
keywords: Cancer of endometrium