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  • Title: Expression of estrogen receptor-alpha and -beta and progesterone receptor-A and -B in a large cohort of patients with endometrioid endometrial cancer.
    Author: Jongen V, Briët J, de Jong R, ten Hoor K, Boezen M, van der Zee A, Nijman H, Hollema H.
    Journal: Gynecol Oncol; 2009 Mar; 112(3):537-42. PubMed ID: 19108875.
    Abstract:
    OBJECTIVE: The estrogen receptor (ER)-alpha and -beta and progesterone receptor (PR)-A and -B were determined in endometrioid endometrial cancer, and their prognostic values were assessed. METHODS: Tissue microarrays were constructed from 315 endometrioid endometrial cancer patients. Receptor expression was assessed by immunostaining, and their semi-quantitatively determined expression levels were correlated to classical clinico-histopathological parameters in addition to disease free and disease specific survival. RESULTS: Patients were classified as FIGO stage I (59.0%), stage II (17.1%), stage III (19.4%) and stage IV (4.1%). Sixty-five patients (20.6%) developed recurrent disease and 38 (12.1%) died due to endometrial cancer. In univariate analysis, expression of ER-alpha was related to early stage endometrial cancer (p=0.020), while expression of ER-alpha, PR-A and PR-B was associated with lower grade tumours (p<0.0001, p<0.001 and p=0.001 respectively). A ratio of ER-alpha/ER-beta <1 was related to a shorter disease free survival (p=0.027), while the ratio of PR-A/PR-B <1 both was associated with a shorter disease free survival as well as a shorter overall survival (p=0.044 and p=0.005, respectively). In early stage disease, using multivariate analysis, absence of ER-alpha was independently related to death of disease (p=0.017, OR 7.28, 95% CI 1.42-37.25), while absence of PR-A (p=0.015, OR 4.2, 95% CI 1.32-13.33) appeared to be an independent prognostic factor for relapse of disease. CONCLUSION: We conclude that in early stage endometrioid endometrial cancer absence of PR-A is an independent prognostic factor for disease-free survival, while patients with ER-alpha positive tumours have a better overall survival.
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