Association of Neoadjuvant Chemotherapy With Overall Survival in Women With Metastatic Endometrial Cancer

Range of Resection in Endometrial Cancer-Clinical Issues of Made-to-Measure Surgery

Endometrial cancer (EC) poses a significant health issue among women, and its incidence has been rising for a couple of decades. Surgery remains its principal treatment method and may have a curative, staging, or palliative aim. The type and extent of surgery depends on many factors, and the risks and benefits should be carefully weighed. While simple hysterectomy might be sufficient in early stage EC, modified-radical hysterectomy is sometimes indicated. In advanced disease, the evidence suggests that, similarly to ovarian cancer, optimal cytoreduction improves survival rate. The role of lymphadenectomy in EC patients has long been a controversial issue. The rationale for systematic lymphadenectomy and the procedure of the sentinel lymph node biopsy are thoroughly discussed. Finally, the impact of the molecular classification and new International Federation of Gynecology and Obstetrics (FIGO) staging system on EC treatment is outlined. Due to the increasing knowledge on the pathology and molecular features of EC, as well as the new advances in the adjuvant therapies, the surgical management of EC has become more complex. In the modern approach, it is essential to adjust the extent of the surgery to a specific patient, ensuring an optimal, made-to-measure personalized surgery. This narrative review focuses on the intricacies of surgical management of EC and aims at summarizing the available literature on the subject, providing an up-to-date clinical guide.

Incidence, risk factors, and a prognostic nomogram for distant metastasis in endometrial cancer: A SEER-based study

OBJECTIVE

To evaluate the metastatic pattern, identify the risk factors, and establish a nomogram for predicting prognosis of endometrial cancer (EC) with distant metastasis.

METHODS

A retrospective cohort study of women diagnosed with EC was conducted according to the Surveillance, Epidemiology, and End Results (SEER) database during 2010-2017. Multivariate logistic analysis and Cox analysis were performed to identify the risk factors in promoting distant metastasis and predictors associated with overall survival (OS) in this particular subpopulation. A nomogram was then constructed and validated by the concordance index (C-index), the area under the receiver operating characteristic curve (AUC), calibration plots, and decision curve analysis.

RESULTS

A total of 2799 cases of distant metastasis in EC patients were identified, with an overall incidence rate of 3.74% from 2010 to 2017. Black race, unmarried status, non-endometrioid histologic types, and grade IV were significant risk factors for distant metastasis in EC patients. Meanwhile, race, histology, grade, metastasis status, surgery, lymphadenectomy, and chemotherapy were identified as independent prognostic factors for OS. A nomogram to predict 1-, 3-, and 5-year OS was established, and presented favorable accuracy and clinical applicability. Patients were further divided into high- and low-risk groups according to the model.

CONCLUSION

The nomogram was developed as a highly accurate, individualized tool to better predict the prognosis of EC patients with distant metastasis, which would help clinicians to identify high-risk patients, and adjust and tailor their treatment strategies.

Temporal Trends in Treatment and Outcomes of Endometrial Carcinoma in the United States, 2005-2020

Endometrial cancer has continued to see a rising incidence in the US over the years. The main aim of this study was to assess current trends in patients' characteristics and outcomes of treatment for endometrial carcinoma over 16 years. A dataset from the National Cancer Database (NCDB) for patients diagnosed with endometrial carcinoma from 2005 to 2020 was used in this retrospective, case series study. The main outcomes and measures of interest included tumor characteristics, hospitalization, treatments, mortality, and overall survival. Then, 569,817 patients who were diagnosed with endometrial carcinoma were included in this study. The mean (SD) age at diagnosis was 62.7 (11.6) years, but 66,184 patients (11.6%) were younger than 50 years, indicating that more patients are getting diagnosed at younger ages. Of the patients studied, 37,079 (6.3%) were Hispanic, 52,801 (9.3%) were non-Hispanic Black, 432,058 (75.8%) were non-Hispanic White, and 48,879 (8.6%) were other non-Hispanic. Patients in the 4th period from 2017 to 2020 were diagnosed more with stage IV (7.1% vs. 5.2% vs. 5.4% vs. 5.9%; p < 0.001) disease compared with those in the other three periods. More patients with severe comorbidities (Charlson Comorbidity Index score of three) were seen in period 4 compared to the first three periods (3.9% vs. ≤1.9%). Systemic chemotherapy use (14.1% vs. 17.7% vs. 20.4% vs. 21.1%; p < 0.001) and immunotherapy (0.01% vs. 0.01% vs. 0.2% vs. 1.1%; p < 0.001) significantly increased from period 1 to 4. The use of laparotomy decreased significantly from 42.1% in period 2 to 16.7% in period 4, while robotic surgery usage significantly increased from 41.5% in period 2 to 64.3% in period 4. The 30-day and 90-day mortality decreased from 0.6% in period 1 to 0.2% in period 4 and 1.4% in period 1 to 0.6% in period 4, respectively. Over the period studied, we found increased use of immunotherapy, chemotherapy, and minimally invasive surgery for the management of endometrial cancer. Overall, the time interval from cancer diagnosis to final surgery increased by about 6 days. The improvements observed in the outcomes examined can probably be associated with the treatment trends observed.

Neoadjuvant chemotherapy in patients with stage IVB uterine serous carcinoma: a Turkish multicentric study

The aim of this study was to evaluate the prognostic factors for and determine the effect of neoadjuvant chemotherapy (NACT) on oncologic outcome in stage IVB pure serous endometrial carcinoma patients who received taxane and platinum. Forty-two patients with 2009 International Federation of Gynecology and Obstetrics (FIGO) stage IVB uterine serous carcinoma were enrolled from six gynecologic oncology centers and a study group was created. The study group had a 2-year disease-free survival (DFS) of 32% and 2-year disease-specific survival (DSS) of 73%. On univariate analysis; lymphadenectomy (not performed vs. performed), paraaortic lymph node metastasis (positive vs. negative) and number of metastatic lymph node count (≤5 vs. >5) were found to have statistical significance for DFS (p < 0.001, p = 0.026 and p = 0.044, respectively). Adnexal metastasis (positive vs. negative) and type of cytoreductive surgery (maximal vs. optimal and suboptimal) had statistical significance for DSS (p = 0.041 and p = 0.015, respectively). Receiving NACT did not affect DFS and DSS in stage IVB uterine serous carcinoma patients. As our sample size was small, precise conclusions could not be made for suggesting the use of NACT in advanced stage uterine serous carcinoma. For more accurate results, more randomized controlled studies are needed in this patient group.IMPACT STATEMENTWhat is already known on this subject? Endometrial carcinoma is the most common type of gynecologic tract malignancies and usually it is diagnosed at early stages. Although the favorable prognosis, uterine serous carcinoma (USC), one of the rarest subtypes, has a poorer prognosis when compared to other histological subtypes. USC has a propensity to spread beyond pelvis. Due to this aggressive behavior, surgical intervention could not be feasible in advanced stage disease.What do the results of this study add? Our study evaluated the prognostic factors that affect survival in advanced stage USC patients. Also we investigated that neoadjuvant chemotherapy (NACT) could improve oncologic outcomes. Performing lymphadenectomy, presence of paraaortic lymph node and adnexal metastasis, number of metastatic lymph nodes and type of cytoreductive surgery improved survival in advanced stage USC patients. However, NACT did not have a statistical significance as a predictor for disease-specific survival (DSS) and disease-free survival (DFS).What are the implications of these findings for clinical practice and/or further research? Maximal surgical effort should be performed in advanced stage USC according to our results. On the other hand, NACT had no impact on DSS and DFS rates. For this reason, we could not be able to suggest the routine use of NACT in advanced stage USC. But more randomized controlled trials are warranted for confirmation of our results.

Efficacy of intra-abdominal cytoreductive surgery in advanced endometrial cancer with distant metastasis

OBJECTIVE

The efficacy of intra-abdominal cytoreductive surgery in patients with endometrial cancer and distant metastasis is equivocal. We investigated the effectiveness of such surgical treatment and whether it should be performed before or after chemotherapy (CT).

METHODS

This study included patients with an International Federation of Gynecology and Obstetrics stage IVB endometrial cancer who received initial treatment at our hospital between January 2006 and December 2017.

RESULTS

We retrospectively reviewed 67 patients with stage IVB endometrial cancer with distant metastases and classified them into preceding surgery (PS, n=23), chemotherapy followed by a surgery (CS, n=27), and CT (n=17) groups. We examined the achievement of resection with [R (1)] or without [R (0)] intra-abdominal macroscopic residue and survival. The median survival time for R (0) was 44 (95% confidence interval [CI]=9-not available [NA]) months in the PS group and 27 (95% CI=11-NA) months in the CS group. The median survival time for R (1) was 9 (95% CI=0-24) months in the PS group and 12 (95% CI=7-19) months in the CS group. The similar prognosis in both groups was worse with R (1) than with R (0). The survival curve for R (1) in the resection groups was similar to that of the CT group.

CONCLUSION

Achieving resection without intra-abdominal macroscopic residue for endometrial cancer with distant metastases, whether before or after CT, could extend patients' survival.

Optimal Management for Stage IVB Endometrial Cancer: A Systematic Review

(1) Background: Endometrial cancer (EC) is a common gynecological malignancy, often diagnosed at an early stage with a high overall survival rate. Surgical treatment is the primary approach, guided by pathological and molecular characteristics. Stage IVB EC, characterized by intra and/or extra-abdominal metastasis, presents a significant challenge with no clear consensus on optimal management. (2) Methods: A systematic literature review was conducted from January to May 2023, covering studies from 2000 to 2023. Eligible studies included retrospective case series, prospective trials, and randomized clinical trials. (3) Results: Of 116 studies identified, 21 were deemed relevant: 7 on primary surgery, 10 on neoadjuvant chemotherapy (NACT), and 4 on adjuvant treatment. Notably, the impact of residual tumor after primary surgery was a critical factor affecting survival. The use of NACT followed by interval debulking surgery showed promise, particularly in cases deemed unresectable. Adjuvant treatment, combining radiotherapy and chemotherapy, demonstrated improved survival but lacked consensus regarding its role. (4) Conclusions: Stage IVB EC poses a complex challenge with limited evidence to guide management. Optimal cytoreduction remains crucial, and NACT should be considered for unresectable cases. Multimodality adjuvant therapy may benefit patients, even with disease spread beyond the pelvis. Future advances in molecular classification and targeted therapies are expected to enhance treatment strategies.

JGOG2046: a feasibility study of neoadjuvant chemotherapy followed by debulking surgery for clinically diagnosed FIGO stage IVb endometrial cancer

BACKGROUND

We evaluated the feasibility of neoadjuvant chemotherapy, followed by debulking surgery, for clinically diagnosed FIGO stage IVb endometrial cancer (protocol number: JGOG2046).

METHODS

The experimental treatment consisted of 3 cycles of paclitaxel (180 mg/m2) plus carboplatin (AUC5) followed by debulking surgery, including total abdominal hysterectomy, bilateral salpingo-oophorectomy, and 3 cycles of adjuvant chemotherapy. Patients were considered as eligible if they were pathologically diagnosed as primary endometrial cancer, and had both endometrial tumor and distant metastasis confirmed by imaging examinations. The primary endpoint was the incidence of patients who completed debulking surgery after the neoadjuvant chemotherapy.

RESULTS

While 51 patients were enrolled from 23 hospitals, the final study cohort consisted of 49 patients with a mean age of 59.0 years. Although the response ratio of the neoadjuvant chemotherapy was 65.3% (95% CI 50.4-78.3%), 67.3% (95% confidence interval (CI) 52.5-80.1%) underwent debulking surgery after the neoadjuvant chemotherapy and 59.2% (95% CI 45.2-71.8%) completed the protocol treatment including 3 courses of adjuvant chemotherapy. The median disease-free survival time was 9.1 months (95% CI 6.5-11.9), while the median overall survival time was 23.2 months (95% CI 11.9-27.8). A patient with sigmoid colon cancer and another with cervical cancer were included in this study.

CONCLUSIONS

Neoadjuvant chemotherapy followed by debulking surgery was a feasible and acceptable treatment for metastatic endometrial cancer. (225 words).

Investigation of the female infertility risk associated with anti-cancer therapy

Female infertility is a significant health issue worldwide with a rising incidence. Anti-cancer therapy is one of the most important reasons for increasing infertility. Although anti-cancer treatment increases the rate of survival, it decreases the quality of life through its side effects. The most substantial side effects are sexual dysfunction and infertility. Breast cancer is the most common cancer. The first-line treatment of breast cancer is chemotherapy by alkylating agents like cyclophosphamide, which leads to infertility. For instance, persistent chemotherapy-induced amenorrhea among breast cancer patients could affect almost half of the patients that undergo such therapy. However, some agents or therapeutic methods can ameliorate these intoxicating effects. Chemotherapy plus gonadotropin-releasing hormone agonist, in breast cancer patients, can not only improve overall survival but also reduce ovarian toxicity. Age plays an essential role in chemotherapy-induced amenorrhea. Chemotherapy at a younger age can reduce the risk of infertility. Gynecological cancers including uterine and ovarian cancer, which have high mortality rates, are the most related cancers to infertility. Surgery is the primary treatment of gynecological cancers. Studies demonstrated that fertility-sparing surgery is a better option than radical surgery. In addition, neoadjuvant chemotherapy is mostly a better option than primary cytoreductive surgery in terms of survival and fertility. Immune checkpoint inhibitors (ICIs) have recently played a major role in treating various cancer types. However, ICIs are associated with hypophysitis, which affects ovaries and can lead to infertility. There are some options for ovarian preservation such as embryo cryopreservation, oocyte cryopreservation, ovarian transposition, ovarian tissue cryopreservation, and ovarian suppression by GnRH agonists. Anti-müllerian hormone level can be utilized to monitor the ovarian reserve. Moreover, to avoid fertility loss, approaches such as using transplantation of human placenta mesenchymal stem cells, administrating anti-inflammatory agents and hormone therapy are under investigation.

Malignant Pleural Effusion Due to Uterine Serous Carcinoma: An Unusual Presentation

Endometrial cancer is the most common cancer of the female genital tract. It can rarely metastasize to the pleura and present as a malignant pleural effusion. Here we present the case of a 61-year-old female with two primary malignancies, breast and endometrium, who presented to us with shortness of breath. Imaging was suggestive of a malignant pleural effusion. Diagnostic and therapeutic thoracentesis were performed that were initially suggestive of a breast source. However, final pleural fluid studies showed endometrial serous carcinoma as the source of the effusion. The patient received pembrolizumab and lenvatinib treatment and continues to be followed up in our clinic.

Executive summary of the American Radium Society appropriate use criteria for management of uterine clear cell and serous carcinomas

BACKGROUND

Uterine clear cell and serous carcinomas have a high propensity for locoregional and distant spread, tend to be more advanced at presentation, and carry a higher risk of recurrence and death than endometrioid cancers. Limited prospective data exist to guide evidence-based management of these rare malignancies.

OBJECTIVE

The American Radium Society sought to summarize evidence-based guidelines developed by a multidisciplinary expert panel that help to guide the management of uterine clear cell and serous carcinomas.

METHODS

The American Radium Society Appropriate Use Criteria presented in this manuscript were developed by a multidisciplinary expert panel using an extensive analysis of current published literature from peer-reviewed journals. A well-established methodology (modified Delphi) was used to rate the appropriate use of diagnostic and therapeutic procedures for the management of uterine clear cell and serous carcinomas.

RESULTS

The primary treatment for non-metastatic uterine clear cell and serous carcinomas is complete surgical staging, with total hysterectomy, salpingo-oophorectomy, omentectomy, and lymph node staging. Even in early-stage disease, patients with uterine clear cell and serous carcinomas have a worse prognosis than those with type I endometrial cancers, warranting consideration for adjuvant therapy regardless of the stage. Given the aggressive nature of these malignancies, and until further research determines the most appropriate adjuvant therapy, it may be reasonable to counsel patients about combined-modality treatment with systemic chemotherapy and radiotherapy.

CONCLUSION

Patients diagnosed with uterine clear cell and serous carcinomas should undergo complete surgical staging. Multimodal adjuvant therapies should be considered in the treatment of both early-stage and advanced-stage disease. Further prospective studies or multi-institutional retrospective studies are warranted to determine optimal sequencing of therapy and appropriate management of patients based on their unique risk factors. Long-term surveillance is indicated due to the high risk of locoregional and distant recurrence.

Survival nomogram for endometrial cancer with lung metastasis: A SEER database analysis

Purpose

The lung is the most common distant metastatic organ in patients with endometrial cancer (EC) but is rarely reported. This study examines the association between clinical characteristics and overall survival (OS) in EC with lung metastasis.

Methods

Patients with EC who had accompanying lung metastasis were selected from the Surveillance, Epidemiology, and End Results (SEER) database between 2010 and 2017. Univariate and multivariate Cox regression were used to estimate hazard ratios (HRs) and 95% confidence intervals (95% CIs) and assess OS outcomes related to EC with lung metastasis. A Cox proportional hazards nomogram model for OS was constructed and validated. The calibration plot, receiver operating characteristic (ROC) curve and decision curve analysis (DCA) were used to evaluate the discriminative ability and clinical benefit of the novel nomogram. Kaplan–Meier curves and scatter diagram analysis were used to investigate the risk stratifications of the nomogram.

Results

Overall, 1542 EC patients with lung metastasis between 2010 and 2017 were included and randomly divided into training and validation cohorts. A nomogram model was constructed using the clinical characteristics of tumor grade, histological type, surgery, adjuvant chemotherapy, adjuvant radiation, brain metastasis and liver metastasis. The concordance indexes (C-indexes) were 0.750 (95% CI, 0.732-0.767) and 0.743 (95% CI, 0.719-0.767) for the training cohort and validation cohort, respectively. Calibration plots and DCA showed good clinical applicability of the nomogram. The areas under the curves (AUCs) were 0.803 and 0.766 for 1-year and 3-year OS, respectively, indicating that the nomogram model had a stable discriminative ability. An online calculator of our nomogram is available on the internet at https://endometrialcancer.shinyapps.io/DynNomapp/. Additionally, patients in the high-risk group had a significantly worse OS than those in the low-risk group.

Conclusion

An easy-to-use, highly accurate nomogram was developed for predicting the prognosis of EC patients with lung metastasis.

A Case of Malignant Pleural Effusion Secondary to Endometrial Cancer After One Year of Hysterectomy

Endometrial cancer is the most common malignant tumor of the female genital tract. It can rarely metastasize to the lung, presenting as a pulmonary nodule and pleural effusion. Here we present a case of a 76-year-old female with a history of endometrial cancer who underwent a total abdominal hysterectomy and came one year later for evaluation of shortness of breath. She was found to have pleural effusion. Diagnostic and therapeutic thoracentesis was positive for malignant cells originating from endometrial cancer. The patient could not tolerate chemotherapy due to poor functional status, and a tunnel pleural catheter was placed for symptomatic relief. In conclusion, it is a rare finding of malignant pleural effusion to have an origin as endometrial cancer. Pleura is the rare distant site of involvement from endometrial cancer.

Clinical implications of neoadjuvant chemotherapy in advanced endometrial cancer: a multi-center retrospective cohort study

Background

The mainstay of endometrial cancer treatment is surgical resection of tumors and postoperative adjuvant treatment is recommended if necessary. However, there is no consensus on the management of unresectable metastatic endometrial cancer. This study aimed to assess the feasibility and effectiveness of neoadjuvant chemotherapy followed by interval debulking surgery (NAC-IDS) in unresectable, metastatic endometrial cancer.

Methods

From the endometrial cancer cohorts of four institutions in Korea, we identified patients with International Federation of Gynecology and Obstetrics stages IIIC–IVB endometrial cancer who received NAC-IDS between January 2008 and December 2020. Through a medical record review, we collected patients’ clinicopathological data. Progression-free survival (PFS), overall survival (OS), and the factors affecting survival outcomes were analyzed.

Results

Overall, 32 patients were included with endometrioid (n = 18), serous (n = 5), carcinosarcoma (n = 6), and other histological types (n = 3). Among them, 28 (87.5%) patients had stage IVB disease. The most common neoadjuvant chemotherapy (NAC) regimen was paclitaxel-carboplatin (n = 25, 78.1%), which was administered for a median of six cycles. While 26 (81.3%) patients showed an objective response, two (6.3%) progressed despite NAC. At the time of interval debulking surgery (IDS), 23 (71.9%) patients achieved complete cytoreduction. During 31.0 months of the median follow-up, there were 23 recurrences and 11 deaths, corresponding to a median PFS of 19.7 months and a 3-year OS rate of 69.7%. In multivariate analyses, non-endometrioid histology and residual tumor after IDS were identified as independent poor prognostic factors for PFS (adjusted hazard ratio [HR], 7.322; P < 0.001 and 5.934; P = 0.001, respectively). Multivariate analysis for OS could not be conducted because of the small number of events, although non-endometrioid histology was the only factor associated with worse OS in univariate analysis (adjusted HR, 4.523; P = 0.032).

Conclusions

NAC-IDS may be a treatment option for unresectable metastatic endometrial cancer. Tumor histology and the possibility of complete cytoreduction are the primary considerations for NAC-IDS.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12885-022-09746-3.

Population-level uptake of neoadjuvant chemotherapy for stage IVB endometrial cancer

OBJECTIVE

To examine population-level trends, characteristics, and outcomes of patients with stage IVB endometrial cancer who received neoadjuvant chemotherapy (NACT) prior to surgery.

METHODS

The National Cancer Institute's Surveillance, Epidemiology, and End Results Program was retrospectively queried by examining 5505 patients with stage IVB endometrial cancer from 2010 to 2018. Exposure allocation was per treatment: primary surgery followed by chemotherapy (n = 3052, 55.4%), NACT followed by surgery (n = 930, 16.9%), and chemotherapy alone (n = 1523, 27.7%). Main outcomes measured were (i) the trend of utilization of NACT and patient characteristics related to NACT assessed with multinomial regression analysis and (ii) overall survival (OS) assessed with multivariable Cox proportional hazards regression model.

RESULTS

The number of patients receiving NACT prior to surgery increased from 11.6% to 21.7% whereas those undergoing primary surgery followed by chemotherapy decreased from 62.7% to 48.3% (P < 0.001). Increasing utilization of NACT remained independent in multivariable analysis (adjusted-odds ratio per one-year increments 1.11, 95% confidence interval [CI] 1.08-1.15). Increasing utilization of NACT was observed in several sub-cohorts including patients aged <65 years, ≥65 years, White, non-White, endometrioid, non-endometrioid, and cases with non-distant organ metastasis (P < 0.05). In a multivariable analysis, NACT followed by surgery and primary surgery followed by chemotherapy had comparable OS (median 25 versus 26 months, adjusted-hazard ratio [HR] 1.03, 95%CI 0.93-1.15). When examined for metastatic extent, NACT followed by surgery was associated with decreased OS compared to primary surgery followed by chemotherapy in the non-distant organ metastasis group (adjusted-HR 1.20, 95%CI 1.05-1.36) whereas it was associated with improved OS in the distant organ metastasis group (adjusted-HR 0.79, 95%CI 0.66-0.95).

CONCLUSION

The treatment of stage IVB endometrial cancer is shifting from primary surgery to NACT in the United States.

New Targeted Therapies and Combinations of Treatments for Cervical, Endometrial, and Ovarian Cancers: A Year in Review

This review of the meaningful data from 2021 on cervical, endometrial, and ovarian cancers aims to provide an update of the most clinically relevant studies presented at important oncologic congresses during the year (the American Society of Clinical Oncology (ASCO) Annual Meeting, the European Society for Medical Oncology (ESMO) Congress and the Society of Gynecologic Oncology (SGO) Annual Meeting). Despite the underlying existence of the COVID-19 pandemic, the last year has been notable in terms of research, with significant and promising advances in gynecological malignancies. Several major studies reporting the effects of innovative therapies for patients with cervical, endometrial, and ovarian cancers might change the medical practice in the future.

Adoption of minimally invasive surgery after neoadjuvant chemotherapy in women with metastatic uterine cancer

OBJECTIVE

Utilization of neoadjuvant chemotherapy (NACT) for advanced stage uterine cancer is increasing. We analyzed the use and outcomes of open versus minimally invasive surgery (MIS) for women with stage IV uterine cancer who received NACT and underwent IDS.

METHODS

The National Cancer Database was used to identify women with stage IV uterine cancer diagnosed from 2010 to 2017 and treated with NACT. Among women who underwent IDS, overall survival (OS) was compared between those who underwent laparotomy vs a minimally invasive approach. To account for imbalances in confounders, a propensity score analysis using inverse probability of treatment weighting (IPTW) was performed.

RESULTS

A total of 1618 women were identified. Minimally invasive IDS was performed in 31.1% and increased from 16.2% in 2010 to 40.4% in 2017 (P < 0.001). More recent year of diagnosis and performance of surgery at a comprehensive cancer center were associated with increased use of MIS (P < 0.05). Women with serous and clear cell tumors, and carcinosarcomas (compared to endometrioid tumors), as well as Medicaid coverage (compared to commercial insurance) were less likely to undergo an MIS approach (P < 0.05). The median OS was 28 months (95% CI 23.7-30.7) and 24.3 months (95% CI 22.3-26.1) for MIS and laparotomy, respectively. After propensity score balancing, there was no association between the use of MIS and survival (HR = 0.90, 95% CI 0.71-1.14).

CONCLUSIONS

Among women with stage IV uterine cancer treated with NACT performance of minimally invasive debulking surgery is increasing. Compared to laparotomy, MIS does not appear to negatively impact survival.

Neoadjuvant chemotherapy for advanced stage endometrial cancer: A systematic review

OBJECTIVE

While primary cytoreductive surgery (PCS) is considered the standard of care for women who present with stage IV endometrial cancer, neoadjuvant chemotherapy (NACT) followed by interval cytoreductive surgery (ICS) has emerged as an alternative treatment strategy. We summarized the literature and compared outcomes of PCS compared to NACT and ICS.

METHODS

We conducted a systematic search on PubMed, Embase, Web of Science, and Scopus for articles published from January 1, 1990 to December 31, 2020. Key search terms included multiple descriptors of advanced disease status in combination with "endometrial cancer" and "neoadjuvant chemotherapy". Our review included studies that examined survival and surgical outcomes of patients with stage III or IV endometrial cancer treated with neoadjuvant chemotherapy followed by interval cytoreductive surgery versus those who received primary cytoreductive surgery. We excluded studies examining only patients with leiomyosarcomas, carcinosarcomas, and stromal sarcomas due to the biologic heterogeneity of these malignancies.

RESULTS

The nine included studies encompassed 5,844 patients, of which 1,317 (22.5%) received NACT and 4,527 received PCS (77.5%). With the exception of a single study, all were retrospective observational studies or case series. Use of NACT in patients with stage IV EC increased from 16.0% in 2010 to 23.9% in 2015. Five studies analyzed median overall survival and all but one reported no significant difference between NACT + ICS vs. PCS. Optimal cytoreduction (<1 cm of residual disease) rates were similar across both treatment groups in three separate analyses, however pooled data suggest improved rates of optimal cytoreduction for NACT + ICS vs. PCS patients (81.9% vs. 51.5% respectively). Patients receiving NACT experienced significantly shorter hospital admissions and lower operative times compared to PCS counterparts.

CONCLUSIONS

NACT followed by ICS reduces perioperative morbidity while offering similar overall survival.

Primary cytoreductive surgery for advanced stage endometrial cancer: a systematic review and meta-analysis

OBJECTIVE

Endometrial cancer uncommonly presents at an advanced stage and little prospective evidence exists to guide the management thereof. We aimed to summarize the evidence about primary cytoreductive surgery in the treatment of advanced stage endometrial cancer.

DATA SOURCES

MEDLINE, Embase, and Scopus databases were searched from inception to September 11, 2020, using search terms representing the themes "endometrial cancer," "advanced stage," and "primary cytoreductive surgery."

STUDY ELIGIBILITY CRITERIA

We included full-text, English reports that included ≥10 patients undergoing primary cytoreductive surgery for advanced stage endometrial cancer and that reported on the outcomes of primary cytoreductive surgery and survival rates based on the residual disease burden.

METHODS

Two reviewers independently screened the studies and with disagreements between the reviewers resolved by a third reviewer. Data were extracted using a standardized form. The percentage of cases reaching maximal (no gross residual disease) and optimal (<1 cm or <2 cm residual disease) cytoreduction were assessed by summing binomials proportions, and the association with survival was assessed using an inverse variance-weighted meta-analysis of logarithmic hazard ratios.

RESULTS

From 1219 unique records identified, 34 studies were selected for inclusion. Studies consisted of single or multi-institutional cohorts of patients collected over a period of 6 to 24 years and included various mixes of histologies (endometrioid, serous, clear cell, and carcinosarcoma) and disease stages (III or IV). In a meta-analysis of the extent of residual disease after primary cytoreductive surgery, we found that 52.1% of cases reached no gross residual disease status (n=18 studies; 1329 patients) and 75% reached <1 cm residual disease status (n=27 studies; 2343 patients). The proportion of cytoreduction for both thresholds was lower for studies of stage IV vs stage III to IV disease (41.4% vs 69.8% for no gross residual disease; 63.2% vs 82.2% for <1 cm residual disease) but did not vary notably by histology. In a meta-analysis of the reported hazard ratios, submaximal (any gross residual disease vs no gross residual disease) and suboptimal (≥1 cm vs <1 cm) cytoreduction thresholds were associated with worse progression-free survival (submaximal hazard ratio, 2.16; 95% confidence interval, 1.45-3.21; I²=68%; suboptimal hazard ratio, 2.55; 95% confidence interval, 1.93-3.37; I²=63%) and overall survival rates (submaximal hazard ratio, 2.57; 95% confidence interval, 2.13-3.10; I²=1%; suboptimal hazard ratio, 2.62; 95% confidence interval, 2.20-3.11; I²=15%). Sensitivity analyses limited to high-quality studies demonstrated consistent results.

CONCLUSION

Among cases of advanced stage endometrial cancer undergoing primary cytoreductive surgery, a significant proportion of patients are left with residual disease, which is associated with worse survival outcomes. Further investigations about the roles of neoadjuvant chemotherapy and primary cytoreductive surgery in prospective trials is warranted in this population.

Use and outcomes of neoadjuvant chemotherapy for metastatic uterine cancer

OBJECTIVE

Neoadjuvant chemotherapy (NACT) has emerged as an alternative to primary cytoreductive surgery (PCS) for stage IV uterine cancer. We examined utilization, perioperative outcomes and survival for NACT and PCS for stage IV uterine cancer.

METHODS

The Surveillance, Epidemiology, End Results-Medicare database was used to identify women with stage IV uterine cancer treated from 2000 to 2015. Women were classified as NACT or PCS. Interval cytoreductive surgery (after NACT) or chemotherapy (after PCS) were recorded. The extent of surgery and perioperative outcomes were estimated for the groups. Multivariable proportional hazards models and Kaplan-Meier analyses were used to examine survival.

RESULTS

Among 3037 women, 1629 (53.6%) were treated with primary cytoreductive surgery, 554 (18.2%) with NACT, and 854 (28.1%) received no treatment. Use of NACT increased from 9.5% to 29.2%. After NACT, interval hysterectomy was performed in 159 (28.6%), while within the PCS group, 1052 (64.6%) received chemotherapy. Extended cytoreductive procedures were performed in 71.7% of women who received NACT vs. 79.1% after PCS (P = 0.03). The complication rate was 52.8% for NACT versus 56.2% for PCS (P = 0.42); medical complications were more frequently seen in the PCS group (39.4% versus 28.9%; P = 0.01). There was no difference in cancer specific (P = 0.48) or overall survival (P = 0.25) in women who received both chemotherapy and surgery regardless of whether the initial treatment was NACT or PCS.

CONCLUSION

Use of NACT is increasing for advanced stage uterine cancer. There was no difference in survival between NACT and primary cytoreductive surgery and NACT was associated with fewer perioperative medical complications.

Uterine serous carcinoma

Serous endometrial cancer represents a relative rare entity accounting for about 10% of all diagnosed endometrial cancer, but it is responsible for 40% of endometrial cancer-related deaths. Patients with serous endometrial cancer are often diagnosed at earlier disease stage, but remain at higher risk of recurrence and poorer prognosis when compared stage-for-stage with endometrioid subtype endometrial cancer. Serous endometrial cancers are characterized by marked nuclear atypia and abnormal p53 staining in immunohistochemistry. The mainstay of treatment for newly diagnosed serous endometrial cancer includes a multi-modal therapy with surgery, chemotherapy and/or radiotherapy. Unfortunately, despite these efforts, survival outcomes still remain poor. Recently, The Cancer Genome Atlas (TCGA) Research Network classified all endometrial cancer types into four categories, of which, serous endometrial cancer mostly is found within the "copy number high" group. This group is characterized by the increased cell cycle deregulation (e.g., CCNE1, MYC, PPP2R1A, PIKCA, ERBB2 and CDKN2A) and TP53 mutations (90%). To date, the combination of pembrolizumab and lenvatinib is an effective treatment modality in second-line therapy, with a response rate of 50% in advanced/recurrent serous endometrial cancer. Owing to the unfavorable outcomes of serous endometrial cancer, clinical trials are a priority. At present, ongoing studies are testing novel combinations of various targeted and immunotherapeutic agents in newly diagnosed and advanced/recurrent endometrial cancer - an important strategy for serous endometrial cancer, whereby tumors are usually p53+ and pMMR, making response to PD-1 inhibitor monotherapy unlikely. Here, the rare tumor working group (including members from the European Society of Gynecologic Oncology (ESGO), Gynecologic Cancer Intergroup (GCIG), and Japanese Gynecologic Oncology Group (JGOG)), performed a narrative review reporting on the current landscape of serous endometrial cancer and focusing on standard and emerging therapeutic options for patients affected by this difficult disease.