ENDOTHELIAL-CELL PROLIFERATION IN THE ENDOMETRIUM OF WOMEN WITH MENORRHAGIA AND IN WOMEN FOLLOWING ENDOMETRIAL ABLATION

Local endometrial aberrations are thought to be the major contributing factor to essential menorrhagia, Here we have examined the role of en dometrial angiogenesis, the growth of new blood vessels, in essential menorrhagia, Our study tested two hypotheses: firstly that angiogenesi s is disturbed in the endometrium of women with menorrhagia; and secon dly that when menstrual blood loss is decreased following endometrial ablation, an endometrial environment favouring normal angiogenesis has returned. Angiogenesis was measured by endothelial cell proliferation , Proliferating endothelial cells were identified by an immunohistoche mical double staining technique, A total of 57 women participated in t his study, of whom 19 were controls, 20 had menorrhagia and 18 were 3- 6 months post-ablation, There was a significant increase in endothelia l cell proliferation in the endometrium of patients with menorrhagia c ompared with the control endometrium. Conversely, post-ablation endome trium showed a nonsignificant decrease in endothelial cell proliferati on, The increased endothelial cell proliferation in the endometrium of patients with menorrhagia was not the result of a general increase in endometrial cellular proliferation and did not result in a change in endothelial cell concentration compared with control endometrium, Thes e results support the hypothesis that angiogenesis is disturbed in the endometrium of patients with menorrhagia and normalized in post-ablat ion endometrium.