title: Incidence of positive peritoneal cytology in patients with endometrial carcinoma after hysteroscopy vs. dilatation and curettage.
abstract: BACKGROUND
  The aim of the study was to compare the frequency of positive peritoneal washings in endometrial cancer patients after either hysteroscopy (HSC) or dilatation and curettage (D&C).
  
  
  METHODS
  We performed a retrospective analysis of 227 patients who underwent either HSC (N = 144) or D&C (N = 83) and were diagnosed with endometrial carcinoma at the University Medical Centre Maribor between January 2008 and December 2014. The incidence of positive peritoneal cytology was evaluated in each group.
  
  
  RESULTS
  There was no overall difference in the incidence of positive peritoneal washings after HSC or D&C (HSC = 13.2%; D&C = 12.0%; p = 0.803). However, a detailed analysis of stage I disease revealed significantly higher rates of positive peritoneal washings in the HSC group (HSC = 12.8%; D&C = 3.4%; p = 0.046). Among these patients, there was no difference between both groups considering histologic type (chi-square = 0.059; p = 0.807), tumour differentiation (chi-square = 3.709; p = 0.156), the time between diagnosis and operation (t = 0.930; p = 0.357), and myometrial invasion (chi-square = 5.073; p = 0.079).
  
  
  CONCLUSIONS
  Although the diagnostic procedure did not influence the overall incidence of positive peritoneal washings, HSC was associated with a significantly higher rate of positive peritoneal cytology in stage I endometrial carcinoma compared to D&C.
authors.affiliation: University Clinic for Gynaecology and Perinatology, University Medical Centre Maribor, Maribor, Slovenia.
authors.forename: Andraz
authors.initials: A
authors.lastname: Dovnik
authors.affiliation: University Clinic for Gynaecology and Perinatology, University Medical Centre Maribor, Maribor, Slovenia.
authors.forename: Bojana
authors.initials: B
authors.lastname: Crnobrnja
authors.affiliation: University Clinic for Gynaecology and Perinatology, University Medical Centre Maribor, Maribor, Slovenia.
authors.forename: Branka
authors.initials: B
authors.lastname: Zegura
authors.affiliation: University Clinic for Gynaecology and Perinatology, University Medical Centre Maribor, Maribor, Slovenia; Faculty of Medicine, University of Maribor, Maribor, Slovenia.
authors.forename: Iztok
authors.initials: I
authors.lastname: Takac
authors.affiliation: University Clinic for Gynaecology and Perinatology, University Medical Centre Maribor, Maribor, Slovenia.
authors.forename: Maja
authors.initials: M
authors.lastname: Pakiz
keywords: FIGO staging; dilatation and curettage; endometrial carcinoma; hysteroscopy; peritoneal cytology