title: Analysis of estrogen- and progesterone-receptor expression in endometrial polyps.
abstract: OBJECTIVE
  To investigate the presence of estrogen receptors (ER) and progesterone receptors (PR) in the glandular epithelium and stroma of endometrial polyps in women who underwent hysteroscopic polypectomy.
  
  
  METHODS
  Prospective study (Canadian Task Force classification II-3.
  
  
  METHODS
  Hospital de Servidor Público Estadual de São Paulo "Francisco Morato de Oliveira."
  
  
  METHODS
  Forty-eight patients with a solitary endometrial polyp who underwent hysteroscopic polypectomy and resection of an endometrial fragment.
  
  
  METHODS
  The estrogen and progesterone receptor expression, in the polyp, was compared with the endometrial hormone expression of the same patients.
  
  
  RESULTS
  The specimens were analyzed by immunohistochemistry. The percentage of staining cells was determined as follows: grade I, 0% to 25%; grade II, 26% to 50%; grade III, 51% to 75%; and grade IV, 76% to 100% of stained nuclei. The intensity of nuclear staining was classified as grade I, absent; grade II, weak; grade III, strong; and grade IV, very strong staining. The sum of both grades was the histochemical score. The total scores of polyp and endometrium were statistically compared. The total scores of ER of glandular epithelium were 258 in polyp and 211 in endometrium. As to stroma, it was 155 in polyp and 163 in endometrium. The total scores of PR of glandular epithelium were 286 in polyp and 211 in endometrium. As to stroma, the totals were 76 in polyp and 77 in endometrium. In immunohistochemistry, the concentrations of both ER and PR in glandular epithelium were significantly higher in endometrial polyp than in normal endometrium. The concentrations of ER and PR in the stroma were similar in the polyp and endometrium. The concentrations of these receptors in the glandular epithelium and stroma were similar in postmenopausal and premenopausal patients.
  
  
  CONCLUSIONS
  The concentrations of ER and PR in glandular epithelium were significantly higher in endometrial polyp than in normal endometrium. The concentrations of these receptors in the glandular epithelium and stroma were similar in the postmenopausal and pre-menopausal patients.
authors.affiliation: Service of Gynecology and Obstetrics, Servidor Público Estadual de São Paulo Hospital, Francisco Morato de Oliveira, Sao Paulo, Brazil. jarelu@uol.com.br
authors.forename: Reginaldo Guedes C
authors.initials: RG
authors.lastname: Lopes
authors.forename: Edmund Chada
authors.initials: EC
authors.lastname: Baracat
authors.forename: Luiz Cavalcanti
authors.initials: LC
authors.lastname: de Albuquerque Neto
authors.forename: José Francisco Dória
authors.initials: JF
authors.lastname: Ramos
authors.forename: Salete
authors.initials: S
authors.lastname: Yatabe
authors.forename: Daniela Baptista
authors.initials: DB
authors.lastname: Depesr
authors.forename: Umberto Gazi
authors.initials: UG
authors.lastname: Lippi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004717:Endometrium / Q000378:metabolism*; D005260:Female; D006801:Humans; D015907:Hysteroscopy; D008593:Menopause / Q000378:metabolism; D008875:Middle Aged; D011127:Polyps / Q000378:metabolism* / Q000601:surgery; D011446:Prospective Studies; D011960:Receptors, Estrogen / Q000096:biosynthesis*; D011980:Receptors, Progesterone / Q000096:biosynthesis*; D014591:Uterine Diseases / Q000378:metabolism* / Q000601:surgery
chemical_list: D011960:Receptors, Estrogen; D011980:Receptors, Progesterone