Clinical trial · Interventional
GnRHa + Letrozole in Obese Progestin-insensitive Endometrial Cancer Patients
Gonadotropin-releasing Hormone Agonist (GnRHa) Plus Letrozole in Obese Progestin-insensitive Early-stage Endometrial Cancer Patients With Conservative Treatment
NCT06379113CI-TRIAL-00093422recruitingPhase 2 / Phase 3ClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 11, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260911-000001
Summary
Brief summary (as posted)
To investigate the efficacy of GnRHa plus letrozole in obese progestin-insensitive EEC patients.
Conditions
Conditions (4)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Atypical Endometrial Hyperplasia | Endometrial Atypical Hyperplasia/Endometrioid Intraepithelial Neoplasia | ALIAS | 0.90 |
| Endometrial Neoplasms | Endometrial Neoplasm | ONTOLOGY_EXACT | 0.98 |
| Obesity | — | UNRESOLVED | — |
| Progesterone Resistance | — | UNRESOLVED | — |
Interventions
Interventions (2)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| GnRH antagonist | Drug | — | UNRESOLVED |
| Letrozole 2.5mg | Drug | Letrozole | ALIAS |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- Obese EEC group
- description
- This group including 29 EEC cases. Interventional Study Model was Simon two-stage optimal design. Eleven patients were needed for the first stage, and if eight or more patients achieved CR at 28 weeks, the trial can enter into the second stage. Then every 12 to 16 weeks, an hysteroscope will be used to evaluate the endometrial condition, and the pathological findings will be recorded.
- interventionNames
- Drug: GnRH antagonist
- Drug: Letrozole 2.5mg
Primary outcomes (1)
- measure
- Complete response rates within 28 weeks of treatment
- timeFrame
- Up to 28 weeks
- description
- The cumulative 28-week CR rates will be calculated in two groups. Patients will be evaluated with an hysteroscopy every 12 to 16 weeks. For some may delay the evaluation as personal reasons, we define the primary outcome measure as complete response rates within 28 weeks of treatment.
Secondary outcomes (5)
Eligibility
Eligibility (as posted)
- Sex
- Female
- Minimum age
- 18 Years
- Maximum age
- 45 Years
Show eligibility criteria text
Inclusion Criteria: * Have a confirmed initial pathological diagnosis based upon hysteroscopy: histologically prove well-differentiated EEC G1 without myometrial invasion * BMI≥30kg/m2 * No signs of suspicious extrauterine involvement on enhanced magnetic resonance imaging (MRI) or enhanced computed tomography (CT) or ultrasound * Using progestin, any of the following therapy, as first-line treatment: 1. Megestrol acetate ≥ 160 mg qd using, combined with Levonorgestrel Lntrauterine System (LNG-IUS) inserted or not 2. Medroxyprogesterone acetate ≥ 250 mg qd using, combined with LNG-IUS inserted or not 3. LNG-IUS inserted * Progestin-insensitive: 1. remained with stable disease after 7 months of progestin use 2. did not achieve CR after 10 months of progestin use * Have a desire for remaining reproductive function or uterus * Good compliance with adjunctive treatment and follow-up Exclusion Criteria: * Combined with severe medical disease or severely impaired liver and kidney function * Pathologically confirmed as endometrial cancer with suspicious myometrial invasion or extrauterine metastasis * Patients with other types of endometrial cancer or other malignant tumors of the reproductive system * Patients with breast cancer or other hormone- dependent tumors or diseases that cannot be used with GnRHa or Letrozole * Strong request for uterine removal or other conservative treatment * Known or suspected pregnancy * Acute severe disease such as stroke or heart infarction or a history of thrombosis disease * Smoker(\>15 cigarettes a day)
References
Publications (1)
- BACKGROUNDZhou S, Xu Z, Yang B, Guan J, Shan W, Shi Y, Chen X. Characteristics of progestin-insensitive early stage endometrial cancer and atypical hyperplasia patients receiving second-line fertility-sparing treatment. J Gynecol Oncol. 2021 Jul;32(4):e57. doi: 10.3802/jgo.2021.32.e57. PMID 34085795