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Hormonal therapies and gynaecological cancers

https://doi.org/10.1016/j.bpobgyn.2007.08.003Get rights and content

Hormonal therapy has an established place in the management of women with gynaecological malignancies, including first-line therapy for recurrent receptor-positive endometrial cancer and low-grade stromal sarcoma. There is no place for adjuvant hormonal treatment of these cancers after primary surgery. Primary treatment with either oral or intra-uterine progestagens to preserve fertility in younger women with endometrial carcinoma is effective in about 70% of cases. Response rates to tamoxifen in advanced/recurrent ovarian cancers approximates 10%. To the authors' knowledge, no studies that reasonably compare different progestagens, different routes of therapy, different doses and different hormonal preparations have been published.

Section snippets

Background

Endometrial cancer is the most common gynaecological cancer in the Western world, affecting more than 40,000 American women per year, of whom nearly 7000 will succumb to the disease. The majority of women present with Stage I disease following an episode of abnormal bleeding, and the 5-year survival rate for this group is 75%.1 Women presenting with more advanced disease or recurrence have a much poorer prognosis, with a 5-year survival rate of 25%.

The strongest risk factor for endometrial

Role of progestagens

Progestagens were shown to have an anti-oestrogenic effect on the endometrium11 and to produce marked changes in the glands and stroma as early as the 1950s12, which led to the concept that progestagens may be useful in the treatment of endometrial cancer.

Progesterone acts as an anti-oestrogen by reducing oestrogen receptor content and the ability of the endometrium to make new receptors, and by increasing oestradiol dehydrogenase.13 This causes both a suppression of endometrial gland growth

Background

Uterine sarcomas account for approximately 3% of all uterine malignancies.11, 34 They arise from mesodermal tissue. Sarcomas display a more aggressive pattern of disease compared with endometrial adenocarcinoma, and include carcinosarcoma, leiomyosarcoma, endometrial stromal sarcoma and adenosarcoma. Endometrial stromal sarcomas (ESSs) are divided into low- and high-grade categories according to mitotic rate. Low-grade ESSs are considered to be more indolent tumours but recurrence rates are as

Background

Ovarian cancer affects more than 20,000 women in the USA each year. It has the highest mortality of all gynaecological cancers*37, 38 due to the fact that the majority of women present with advanced disease. Overall survival is of the order of 37–44%39, with 5-year survival rates of 80% for Stage I disease and 10–15% for Stage IV disease.38

The exact mechanism of development of ovarian cancer is uncertain, but repetitious ovulatory activity may be a factor in the malignant transformation of the

Summary

A variety of gynaecological cancers respond to hormonal manipulation. The presence of steroid receptors gives a good guide to likely response in endometrial carcinoma and stromal sarcoma, but no such correlation exists with ovarian epithelial malignancies. A lack of trials comparing different agents and combinations, different methods and sequencing of delivery, and different doses has led to a restricted availability of hormonal options in this setting. Future research should be directed at

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