[Postmenopausal malignant transformation of extragenital endometriosis. A case report]

Topical estrogens for the treatment of superficial dyspareunia related to genitourinary syndrome of menopause in women with a history of endometriosis: A clinical dilemma

Estrogen withdrawal, which occurs with the cessation of ovulation, causes genitourinary syndrome of menopause in up to 50-85% of women. Symptoms may profoundly impact quality of life and sexual function, interfering with enjoyment of sex in up to three out of four individuals. Topical estrogens have been found to provide symptom relief with minimal systemic absorption and appear to be superior to systemic therapy as what regards genitourinary symptoms. However, conclusive data on their appropriateness in postmenopausal women with a history of endometriosis is not available and the hypothesis that exogenous estrogen stimulation may reactivate endometriotic foci or even promote their malignant transformation is still open. On the other hand, endometriosis affects around 10% of premenopausal women, many of which may be exposed to an acute hypoestrogenic depletion even before spontaneous menopause occurs. This considered, excluding on principle patients with a history of endometriosis from first-line treatment for vulvovaginal atrophy would mean excluding a considerable percentage of the population from adequate care. More robust evidence is urgently needed in these regards. Meanwhile, it would appear reasonable to tailor the prescription of topical hormones in these patients, taking into account the entity of symptoms and the impact such symptoms have on patients' quality of life, as well as the form of endometriosis and the possible risks hormonal may entail. Moreover, the application of estrogens on the vulva instead of the vagina could be efficacious, while outweighing the possible biological cost of hormonal treatment in women with a history of endometriosis.

The management of menopause in women with a history of endometriosis: a systematic review

BACKGROUND

Endometriosis is typically regarded as a premenopausal disease, resolving after natural or iatrogenic menopause due to declining oestrogen levels. Nonetheless, case reports over the years have highlighted the incidence of recurrent postmenopausal endometriosis. It is now clear that both recurrence and malignant transformation of endometriotic foci can occur in the postmenopausal period. Postmenopausal women are commonly treated with hormone replacement therapy (HRT) to treat climacteric symptoms and prevent bone loss; however, HRT may reactivate endometriosis and stimulate malignant transformation in women with a history of endometriosis. Given the uncertain risks of initiating HRT, it is difficult to determine the best menopausal management for this group of women.

OBJECTIVE AND RATIONAL

The aim of this study was to systematically review the existing literature on management of menopausal symptoms in women with a history of endometriosis. We also aimed to evaluate the published literature on the risks associated with HRT in these women, and details regarding optimal formulations and timing (i.e. initiation and duration) of HRT.

SEARCH METHODS

Four electronic databases (MEDLINE via OVID, Embase via OVID, PsycINFO via OVID and CINAHL via EbscoHost) were searched from database inception until June 2016, using a combination of relevant controlled vocabulary terms and free-text terms related to 'menopause' and 'endometriosis'. Inclusion criteria were: menopausal women with a history of endometriosis and menopausal treatment including HRT or other preparations. Case reports/series, observational studies and clinical trials were included. Narrative review articles, organizational guidelines and conference abstracts were excluded, as were studies that did not report on any form of menopausal management. Articles were assessed for risk of bias and quality using GRADE criteria.

OUTCOMES

We present a synthesis of the existing case reports of endometriosis recurrence or malignant transformation in women undergoing treatment for menopausal symptoms. We highlight common presenting symptoms, potential risk factors and outcomes amongst the studies. Sparse high-quality evidence was identified, with few observational studies and only two randomized controlled trials. Given this paucity of data, no definitive conclusions can be drawn concerning risk.

WIDER IMPLICATIONS

Due to the lack of high-quality studies, it remains unclear how to advise women with a history of endometriosis regarding the management of menopausal symptoms. The absolute risk of disease recurrence and malignant transformation cannot be quantified, and the impact of HRT use on these outcomes is not known. Multicentre randomized trials or large observational studies are urgently needed to inform clinicians and patients alike.

Malignant transformation of superficial peritoneal endometriosis lesion

A 63-year-old woman with no medical history underwent an abdominal surgery with hysterectomy and bilateral salpingo-oophorectomy for a 10 cm peritoneal cyst with increased cancer antigene-125. A large suspicious tumour of the Douglas space, with contact to the uterus and the rectal wall was described. The rest of the exploration was normal, specially the rest of the peritoneum. Histopathology revealed a malignant transformation of a superficial peritoneal endometriosis. Secondary surgery was thus completed by laparoscopy with bilateral pelvic and para-aortic lymph node dissections, omentectomy and multiple peritoneal biopsies. All staging samples were free of cancer; therefore no complementary therapy was administered. After 18 months of follow-up, consisting of clinical examination and pelvis magnetic resonance imaging every 6 months, we did not observe any recurrence. Malignant transformation of superficial peritoneal endometriosis is a rare disease and surgical management seems to be the main treatment.