Hormone therapy and breast density in women with premature ovarian failure / Terapia hormonal e densidade mamaria em mulheres com falencia ovariana prematura

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Introuction: Premature ovarian failure (POF) may lead to serious consequences due to a prolonged low estrogen state and there is a precise indication for hormone replacement therapy to minimize such alterations. Studies have evaluated the impact of hormone therapy on the breasts of postmenopausal women, however the consequences of treatment on the breasts of younger women are still unknown. Objective: To evaluate the effects of hormone therapy with Conjugated Equine Estrogen (CEE) associated with cyclic or continuous Medroxyprogesterone Acetate (MPA) on breast density in women affected by premature ovarian failure, compared to breast density in age-matched eumenorrheic women, and also to breast density in postmenopausal women who had been receiving hormone therapy for the same amount of time. Subjects and Methods: A cross-sectional study was conducted involving 31 women with premature ovarian failure seen at the Gynecologic Endocrinology Outpatient Clinical Facility of the Department of Obstetrics and Gynecology in the UNICAMP Medical School. All women underwent mammography and digitization of mammogram films was performed. The study group was compared to a control group composed of 31 eumenorrheic women paired by age in years, who had also undergone mammography. A second control group consisting of 31 postmenopausal women, using hormone therapy with Conjugated Equine Estrogen associated with Medroxyprogesterone Acetate, paired by length of hormone replacement therapy in years (±11 months), also underwent mammography for comparison. Breast density in the three groups was quantified by a digitizing technique of mammographic images and also by the Wolfe classification system, stratified into two categories: dense and non-dense. Statistical and Analysis: Age and BMI were data assessed by the mean and standard deviations. For comparison of breast density, calculated by an image digitization method, the ANOVA test was used. When breast density was analysed by the Wolfe system, the chi-square test was used (X2). The Student?s T-test and the Mann-Whitney?s nonparametric test were used to evaluate the following variables: parity, time since gonadal failure and duration of hormone therapy. The Chi-Square test (X2) was used to evaluate the breastfeeding variable. The significance level was set at 5%. For statistical analysis, the SPSS 15.0 software for Windows/2006 was used. Results: The mean mammographic breast densities in women with POF who were eumenorrheic, using the digitization technique were 24.1% (±14.6) and 21.8% (±11.3), respectively (p= 0.50) and no differences were observed between the groups. Evaluation by the Wolfe system also showed no significant difference among the groups. The mean breast densities in women with POF and in postmenopausal women were 24.1% (±14.6) and 18.1% (±17.2), respectively (p= 0.15) and no difference was observed among the groups, the same occurring when analysis was performed by the Wolfe system. Conclusion: We have presented initial evidence that hormone replacement therapy with CEE + MPA does not increase breast density in women with POF, when compared to agematched women with preserved gonadal function or postmenopausal women paired by length of hormone replacement therapy. Follow-up of the POF group is now being carried out for future prospective studies

ASSUNTO(S)

diagnostico por imagem mamografia hormone replacement therapy menopause terapia de reposição hormonal mamas - doenças premature diagnostic imaging menopausa precoce breast diseases

ACESSO AO ARTIGO

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