Improving the Treatment for Women With Early Stage Cancer of the Uterus

Study Overview
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Brief Summary
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Currently the standard treatment for early stage endometrial cancer or endometrial hyperplasia with atypia is a total hysterectomy (an operation to remove the uterus) and removal of both ovaries. While highly effective, this surgery carries significant side effects for: young women who still wish to have children and would lose fertility; and women with one or more disorders (or diseases) in addition to the early stage endometrial cancer or endometrial hyperplasia with atypia and/or morbid obesity who are at risk for surgical complications making surgery unsafe. This study will access a new approach to the treatment of endometrial cancer to spare women of having to undergo major surgery that may be unwanted or unnecessary. Mirena is approved in Australia for contraception, to treat heavy bleeding, and to prevent thickening of the lining of the uterus (endometrial hyperplasia) during oestrogen replacement therapy (HRT). However it is not approved to treat early stage endometrial cancer or endometrial hyperplasia with atypia. This research project will test to see if Mirena is an effective treatment for early stage endometrial cancer and endometrial hyperplasia with atypia. Metformin is approved in Australia to treat Diabetes. However it is not approved to treat early stage endometrial cancer or endometrial hyperplasia with atypia. Therefore, it is an experimental treatment for early stage endometrial cancer and endometrial hyperplasia with atypia. This means that it must be tested to see if it is an effective treatment for early stage endometrial cancer and endometrial hyperplasia with atypia. Weight loss interventions are feasible and safe, and already being implemented by gynaecologic oncologist to make women eligible for surgery. Weight loss of 7% body weight induces a large biological effect (for example reduces incidence of diabetes by 58%, and hypertension by 26%).

Official Title
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A Phase II Randomised Clinical Trial of Mirena® ± Metformin ± Weight Loss Intervention in Patients With Early Stage Cancer of the Endometrium

Conditions
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Complex Endometrial Hyperplasia With Atypia, Grade 1 Endometrial Endometrioid Adenocarcinoma

Intervention / Treatment
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* Drug: Levonorgestrel
* Drug: Metformin


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Females with a BMI > 30 kg/m2 wishing to retain fertility or females who are at high risk of surgical complications due to co-morbidities or obesity Over 18 years of age at time of randomisation Histologically confirmed complex endometrial hyperplasia with atypia or grade 1 endometrioid endometrial adenocarcinoma on a curette or endometrial biopsy CT or MRI scan of pelvis, abdomen and chest (or chest X-Ray) suggesting the absence of extrauterine disease Myometrial invasion on MRI of not more than 50%, for women with histologically confirmed Endometrial Cancer only (for women who are unable to fit into an MRI machine inclusion into trial is at investigators discretion) No lymph vascular invasion on curetting or pipelle, if able to be assessed on sample Serum CA125 ≤ 30 U/mL No hypersensitivity or contraindications for Mirena Ability to comply with endometrial biopsies at specified intervals Negative serum or urine pregnancy test in pre-menopausal women and women < 2 years after the onset of menopause Creatinine < 150µmol/L (1.7 mg/dL) to be randomised into Mirena + Metformin arm (can still be eligible to be randomised to Mirena only or Mirena + Weight Loss, see section 5.4 Other Eligibility Criteria Considerations) Exclusion Criteria: ECOG performance status > 3 Grade 1 endometrioid adenocarcinoma of the endometrium with myometrial invasion deeper than 50% on MRI or any patients with grade 2 or grade 3 endometrioid adenocarcinoma Histological (cell) type other than endometrioid adenocarcinoma (sarcomas or high risk endometrial e.g. papillary serous, clear cell) Pregnant or planning to become pregnant during trial period Has had prior treatment or undergoing current treatment for EAC or EHA Patients with a history of pelvic or abdominal radiotherapy Unwilling to have additional endometrial biopsies or curettes and unable to attend three monthly clinical assessments Unable to provide informed consent Unable or unwilling to complete questionnaires Evidence of extrauterine spread on medical imaging Congenital or acquired uterine anomaly which distorts the uterine cavity Acute pelvic inflammatory disease Conditions associated with increased susceptibility to infections with microorganisms (e.g., AIDS, leukaemia, IV drug abuse) according to the patients Medical History Genital actinomycosis Current other cancer, except low grade malignancies that do not require any systemic treatment or treatment to the pelvis Breastfeeding mothers Mirena inserted greater than 12 weeks before randomisation/enrolment Previous use of Mirena within the last 5 years from randomisation/enrolment Contraindications to both Metformin and weight loss

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Mirena + Metformin<br>Metformin tablets, 500mg twice daily orally, 6 months Levonorgestrel (Mirena®) 52mg Intrauterine drug delivery system, 6 months | Drug: Levonorgestrel<br>* Intrauterine device<br>* Other names: Mirena;Drug: Metformin<br>* oral medication<br>|
| Experimental: Mirena<br>Levonorgestrel (Mirena®) 52mg Intrauterine drug delivery system, 6 months | Drug: Levonorgestrel<br>* Intrauterine device<br>* Other names: Mirena;|
| Experimental: Mirena + Weight Loss Intervention<br>Levonorgestrel (Mirena®) 52mg Intrauterine drug delivery system, 6 months Weight Loss Intervention will be delivered via Weight Watchers | Drug: Levonorgestrel<br>* Intrauterine device<br>* Other names: Mirena;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pathological complete response |  | 6 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Predict the response to treatment | To predict the response to treatment through blood and tissue molecular biomarkers and to increase our molecular understanding of the biological pathogenesis of early EAC. | 6 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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endometrial hyperplasia, endometrial adenocarcinoma, Gynecological Cancer