title: A predictive model for endometriosis.
abstract: BACKGROUND
  Aromatase is the key enzyme in the process of estrogen biosynthesis from the precursor androgen. Recently, aromatase has been found to be aberrantly expressed in eutopic endometrium of patients suffering from endometriosis. This finding has prompted speculation about the contribution of this enzyme to the prediction of this disease.
  
  
  METHODS
  We prospectively aimed to evaluate whether endometrial biopsy, prior to laparoscopy in symptomatic women to screen for the presence of aromatase by real-time RT-PCR and immunohistochemistry, combined with select patients' characteristics, is of value to predict endometriosis.
  
  
  RESULTS
  Of 48 consecutive symptomatic and eligible patients, 25 (52.1%) exhibited endometriosis and 23 (47.9%) were disease-free. A multiple logistic regression model revealed that 95.5% of patients whose eutopic endometrium was found to be positive for aromatase mRNA as well as immunohistochemically detected protein and who were additionally suffering from moderate to severe dysmenorrhoea (visual analogue scale score >4/10) exhibited endometriosis at laparoscopy.
  
  
  CONCLUSIONS
  These findings provide direct evidence that screening for eutopic endometrial aromatase in combination with clinical data could be of discriminative value in the prediction of disease.
authors.affiliation: Department of Obstetrics and Gynaecology, Division of Gynaecological Endocrinology and Reproductive Medicine, Medical University of Vienna, Waehringer Gürtel 18-20, 1090 Vienna, Austria.
authors.forename: M M
authors.initials: MM
authors.lastname: Wölfler
authors.forename: F
authors.initials: F
authors.lastname: Nagele
authors.forename: A
authors.initials: A
authors.lastname: Kolbus
authors.forename: S
authors.initials: S
authors.lastname: Seidl
authors.forename: B
authors.initials: B
authors.lastname: Schneider
authors.forename: J C
authors.initials: JC
authors.lastname: Huber
authors.forename: W
authors.initials: W
authors.lastname: Tschugguel
mesh_terms: D000328:Adult; D000368:Aged; D001141:Aromatase / Q000032:analysis*; D001706:Biopsy; D004715:Endometriosis / Q000175:diagnosis* / Q000473:pathology; D004717:Endometrium / Q000201:enzymology / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012044:Regression Analysis
chemical_list: D001141:Aromatase