ABSTRACT
INTRODUCTION: Bisphenol A is an endocrine disruptor used in the composition of food containers. It was partially banned in France in 2015 and classified as a "very high-risk substance" in 2017. Bisphenol A's carcinogenic effects have been demonstrated in animal testing. Bisphenol A acts through estrogen-dependent and estrogen-independent pathways. It induces epigenetic changes and impacts the microenvironment of the mammary gland. However, the role of bisphenol A exposure in the development of breast cancer in humans remains controversial. This study documents the current thinking on bisphenol A with an analysis of the mechanisms and a meta-analysis. MATERIALS AND METHODS: A literature review and a statistical analysis of linear regression type, with the creation of a Forest plot, were used to perform the meta-analysis of 9 studies including 10,695 patients. RESULTS: Nine case-control studies, published between 1990 and 2021, investigating the association between breast cancer and mean urinary, blood or tissue bisphenol A levels were selected. The meta-analysis did not find a significant association between bisphenol A exposure and the development of breast cancer with an OR=(1 IC95% [0.92-1.08]). DISCUSSION: This meta-analysis does not show a link between breast cancer and bisphenol A exposure. Nevertheless, the analysis of a pathogenic link between bisphenol A and breast cancer requires additional cohort studies to conclude because of methods of available studies.
Subject(s)
Breast Neoplasms , Female , Humans , Benzhydryl Compounds/toxicity , Breast Neoplasms/chemically induced , Estrogens , Phenols/toxicity , Tumor MicroenvironmentABSTRACT
INTRODUCTION: The benefits of physical activity (PA) in breast cancer are currently recognized in primary prevention. The World Cancer Research Fund (WCRF) and then the National Cancer Institute (INCa) have reported conflicting results regarding the impact of post-diagnosis PA on breast cancer outcomes. The aim of this systematic review is to assess the association between PA after breast cancer diagnosis and overall mortality, specific mortality and risk of breast cancer recurrence in the literature. METHODS: Randomized trials, prospective cohorts and meta-analyses studying post-diagnosis PA and overall mortality, breast cancer mortality or risk of recurrence after breast cancer published between January 1, 2014 and October 1, 2019 were included. The articles selected by the INCa report prior to 2014 were included in the literature review. RESULTS: Eighteen articles have been selected. Studies unanimously concluded that overall mortality was reduced by post-diagnosis PA practice. For specific mortality, 5 meta-analyses showed a significant decrease in breast cancer mortality and 2 found a decrease in the risk of recurrence. CONCLUSION: Post-diagnosis PA reduces overall mortality and appears to impact specific breast cancer mortality and risk of recurrence. However, these results need to be confirmed by larger randomized trials.
Subject(s)
Breast Neoplasms/mortality , Exercise , Breast Neoplasms/diagnosis , Female , Humans , Survival RateABSTRACT
OBJECTIVE: To describe knowledge and attitudes toward fertility preservation (FP) in patients with endometrial atypical hyperplasia or adenocarcinoma (EC/AH) among French gynecologists MATERIALS AND METHODS: A national survey among French gynaecologists: one questionnaire with one common part and two specific parts for gynecological surgeon (GS) or for specialists in reproductive medicine (SRM) was sent from April 2017 to April 2018. Knowledge and attitudes toward FP in EC/AH were evaluated with a "knowledge score" and an "attitudes score" using a four- or five-point Likert scale. RESULTS: One hundred forty physicians completed the survey (87 GS, 53 SRM). The knowledge score was low (59.3% medium/low), but it was significantly higher for GS compared to SRM. The better-known treatments were oral progestins and hysteroscopic resection. Among the participants treating EC/AH, 52.6% found it "difficult" to manage patients and 61.8% regretted the lack of official recommendations. Most physicians seemed to be uncomfortable/unsupportive with FP in EC/AH (57.2% "attitude score' below 11/20). There was a positive correlation between knowledge and attitude scores. GS "usually/always" give advice to patients about FP before EC/AH treatment. After maximum 3-6 months, 56.6% of SRM chose In Vitro Fecundation (IVF) to reduce time-to-pregnancy, with GnRH antagonist protocols (28%) or mild-stimulation (15.1%) to avoid hyperoestrogenism. CONCLUSIONS: Despite reassuring results in the literature, French gynecologists are uncomfortable with FP using EC/AH conservative management, which may be because of a lack of confidence in their knowledge. Specific guidelines are needed to help physicians manage these young patients and their fertility.
Subject(s)
Conservative Treatment/methods , Endometrial Neoplasms/therapy , Fertility Preservation/methods , Gynecology/methods , Health Knowledge, Attitudes, Practice , Reproductive Medicine/methods , Adenocarcinoma/therapy , Adult , Attitude of Health Personnel , Endometrial Hyperplasia/therapy , Endometrial Neoplasms/surgery , Female , France , Gonadotropin-Releasing Hormone/agonists , Gynecologic Surgical Procedures/methods , Humans , Hysteroscopy , Intrauterine Devices, Medicated , Levonorgestrel/administration & dosage , Levonorgestrel/therapeutic use , Male , Middle Aged , Patient Education as Topic , Pregnancy , Progestins/therapeutic use , Surveys and QuestionnairesABSTRACT
INTRODUCTION: There is a growing interest in diets and their effects on cancer prognosis. In 2014, a report from the World Cancer Research Fund on diet and women with a history of breast cancer did not demonstrate a major effect on breast cancer prognosis. The aim of this literature review was to provide an update of knowledge in this area. METHODS: Randomized trials, prospective cohorts and meta-analyses published between 2012 and 2018 examining the impact of diet on recurrence risk and/or mortality after breast cancer were included, to achieve the objective. We evaluated study quality (according to Haute Autorité de Santé criteria) and the studied diets were categorized: macronutrients, micronutrients and selective foods. RESULTS: We selected eighteen articles that met levels of evidence 1 to 3. For macronutrients, a low-fat diet was associated with better survival. With regard to micronutrients, a diet rich in phytÅstrogen reduced the risk of cancer recurrence. Finally, the adoption of a healthy diet was not associated with an improved prognosis for breast cancer but with an improvement in overall survival and risk of death from cardiovascular disease. DISCUSSION: This review suggests that nutrition influences the prognosis of breast cancer. Nevertheless, the level of evidence of the results was insufficient to make recommendations. Ultimately, a healthy and balanced diet could be encouraged in order to reduce global mortality.
