Does preoperative CA-125 cutoff value and percent reduction in CA-125 levels correlate with surgical and survival outcome after neoadjuvant chemotherapy in patients with advanced-stage ovarian cancer? - Our experience from a tertiary cancer institute

The Role of CA-125 in the Management of Ovarian Cancer: A Systematic Review

BACKGROUND

Ovarian cancer is frequently occurring and fatal for women. CA-125 is important in the screening, diagnosis, and treatment of ovarian cancer. This review study was conducted to explore the influence of CA-125 in addressing ovarian cancer.

METHODS

To investigate the role of CA-125 in ovarian cancer, we conducted a comprehensive search for high-quality articles in the Medline, Web of Science Core Collection and Scopus databases using the keywords "ovarian cancer," "ovarian carcinoma," "ovarian neoplasms," and "CA-125" from the 2000 to 2024. We included full-text, peer-reviewed articles in English with relevant keywords published since 2000. We excluded case reports, commentaries, letters to the editor, books, case series, systematic reviews, animal studies, and articles that were not accessible in full text.

RESULTS

After screening the 7947 records, 88 studies were included in this review. In the literature review, it was found that researchers utilized CA-125 for diagnosing ovarian cancer, its predicting, evaluating treatment response, assessing ovarian cancer survival, and early detection of recurrence. In some cases, researchers employed additional tumor markers alongside CA-125 to enhance the test's sensitivity.

CONCLUSION

CA-125 has become a pivotal marker for ovarian cancer. Its role in the diagnosis, treatment, and ongoing assessment of ovarian cancer cannot be overstated. Continuous monitoring of CA-125 levels can provide comprehensive insights, and categorizing patients as low-risk or high-risk based on CA-125 levels could lead to better outcomes. Integrating CA-125 with other biomarkers may enhance the accuracy of the test and elevate its relevance in patient care.

Clinical effects of debulking surgery combined with neoadjuvant chemotherapy in treating ovarian cancer and its influence on tumor markers and immune function

Objective

Exploring the clinical efficacy of tumor cell reduction combined with neoadjuvant chemotherapy in treatment of ovarian cancer.

Methods

Retrospective analysis was conducted of one hundred patients with advanced ovarian cancer at Yellow River Sanmenxia Hospital from January 2017 to December 2022. They were divided into control group and observation group based on treatment methods, with 50 cases in each group. The control group was treated with tumor cell reduction surgery, the observation group treated with neoadjuvant chemotherapy and tumor cell reduction surgery. The surgical related conditions, clinical treatment effects, tumor markers, cellular immune function levels, quality of life, and adverse reactions were compared.

Results

The observation group had shorter surgical and hospitalization times, with less intraoperative blood loss and abdominal fluid accumulation compared to control group (P<0.05). The serum levels in both groups of patients were significantly reduced, and observation group had a higher degree of decrease (P<0.05). The levels of cellular immune function levels in both groups improved significantly, and observation group showed more significant improvement (P<0.05). The total efficacy of observation group patients was 72.00%, higher than control group's 52.00% (P<0.05). The SS-QOL scores of both groups of patients improved significantly, and the degree of improvement in observation group was significant (P<0.05).

Conclusion

The combination of tumor cell reduction surgery and neoadjuvant chemotherapy for ovarian cancer can significantly shorten surgical and hospitalization time, inhibit tumor marker expression, improve patient immune function and quality of life.

Are preoperative serum cancer antigen 125 levels a prognostic factor for outcome in epithelial ovarian cancer? A systematic review

Background

Most patients with epithelial ovarian cancers (EOC) present with advanced-stage disease because of non-specific symptoms and lack of reliable strategies for early diagnosis. Cancer antigen 125 (CA-125) is suggested as a useful prognostic biomarker, its serum level is raised in over 80.0% of patients with EOC. Primary debulking surgery (PDS) followed by chemotherapy is the conventional treatment, but neoadjuvant chemotherapy followed by interval debulking surgery (NACT-IDS) is offered to patients with unresectable disease. There are inconsistencies regarding the role of preoperative CA-125 serum levels to adopt in stratifying patients for treatment choice that offers the most benefit. This review aimed to determine the role of preoperative CA-125 levels in predicting optimal cytoreduction and the association between optimal cytoreduction and survival outcome in patients with EOC.

Methodology

Three electronic databases CINAHL, Cochrane library and PubMed were searched for potentially relevant articles from 2016 to 2021 on the role of preoperative CA-125 levels in predicting optimal cytoreduction and survival in patients with epithelial ovarian carcinomas.

Conclusion

In patients who underwent NACT-IDS, a lower preoperative CA-125 value is a predictor of optimal cytoreduction and an increase in preoperative CA-125 value is consistently associated with a decrease in optimal cytoreduction. There was insufficient data to assess overall survival. However, a raised preoperative CA-125 level is poor predictor of chance of achieving optimal cytoreduction and the rate of optimal cytoreduction was a weak predictor of overall survival in women who had primary debulking surgery.

Unresectable Ovarian Cancer Requires a Structured Plan of Action: A Prospective Cohort Study

BACKGROUND

Patients with unresectable disease during cytoreductive surgery (CRS) for advanced-stage ovarian cancer are underreported. Knowledge of treatment and survival after surgery is limited. The aim of this study is to address the knowledge gap about postoperative treatment and survival of patients whose surgery was abandoned due to unresectability after abdominal exploration.

METHODS

Women with FIGO stage IIIB-IV epithelial ovarian cancer whose disease was considered to be unresectable during surgery were included in this prospective study, a post hoc analysis of the PlaComOv study. The unresectable disease was defined as the inability to achieve at least suboptimal CRS without attempted CRS after careful inspection of the entire abdomen. Preoperative clinical data, perioperative findings, postoperative treatment and survival data were analyzed.

RESULTS

From 2018 to 2020, 27 patients were included in this analysis. Treatment ranged from the cessation of treatment to one or several lines of chemotherapy with or without maintenance therapy. The median overall survival was 16 (IQR 5-21) months (95%CI 14-18). At 24 months of follow-up, four patients (15%) were alive.

CONCLUSIONS

This study indicated a two-year survival of 15%. Optimal treatment strategies in terms of survival benefits are still ill-defined. Further study of this specific group of patients is warranted. We advocate an (inter)national registry of patients with unresectable cancer and comprehensive follow-up.

Preoperative Cancer Antigen 125 Level as Predictor for Complete Cytoreduction in Ovarian Cancer: A Prospective Cohort Study and Systematic Review

Background: The tumor marker ‘cancer antigen 125’ (CA-125) plays a role in the management of women with advanced stage ovarian cancer. This study aims to describe the predictive value of pre-treatment CA-125 level and the reduction after neoadjuvant chemotherapy (NACT) on surgical outcome. Methods: A systematic review and a prospective clinical study were performed. Multiple databases were searched from database inception to April 2022. The clinical study is part of a randomized controlled trial named “PlaComOv-study”. A regression analysis was performed to demonstrate correlations between preoperative CA-125 levels, CA-125 reduction after NACT, and surgical outcome. Results: Fourteen relevant articles were analyzed of which eleven reported that lower preoperative CA-125 levels were associated with a higher probability of complete cytoreduction. In the clinical study, 326 patients with FIGO stage IIIB-IV ovarian cancer who underwent CRS were enrolled from 2018 to 2020. Patients who underwent interval CRS with preoperative CA-125 levels ≤35 kU/L had higher odds of achieving complete CRS than patients with CA-125 level >35 kU/L (85% vs. 67%, OR 2.79, 95%CI 1.44−5.41, p = 0.002). In multivariable analysis with presence of ascites and peritoneal carcinomatosis, normalized preoperative CA-125 did not appear as a significant predictor for complete CRS. Conclusions: In literature, preoperative CA-125 levels ≤35 kU/L were associated with a significant higher percentage of complete CRS in univariable analysis. According to our cohort study, preoperative CA-125 level ≤35 kU/L cannot independently predict surgical outcome either for primary or interval CRS.

Preoperative serum CA-125 level as a predictor for the extent of cytoreduction in patients with advanced stage epithelial ovarian cancer

BACKGROUND

Ovarian cancer is the seventh most common cancer in women worldwide and the eighth most common cause of cancer death. Due to the lack of effective early detection strategies and the unspecific onset of symptoms, it is diagnosed at an advanced stage in 75% of cases. The cancer antigen (CA) 125 is used as a prognostic marker and its level is elevated in more than 85% of women with advanced stages of epithelial ovarian cancer (EOC). The standard treatment is primary debulking surgery (PDS) followed by adjuvant chemotherapy (ACT), but the later approach is neoadjuvant chemotherapy (NACT) followed by interval debulking surgery (IDS). Several studies have been conducted to find out whether preoperative CA-125 serum levels influence treatment choice, surgical resection and survival outcome. The aim of our study was to analyse experience of single institution as Cancer comprehensive center with preoperative usefulness of CA-125.

PATIENTS AND METHODS

At the Institute of Oncology Ljubljana a retrospective analysis of 253 women with stage FIGO IIIC and IV ovarian cancer was conducted. Women were divided into two groups based on their primary treatment. The first group was the NACT group (215 women) and the second the PDS group (38 women). The differences in patient characteristics were compared using the Chi-square test and ANOVA and the Kaplan-Meier method was used for calculating progression-free survival (PFS) and overall survival (OS).

RESULTS

The median serum CA-125 level was higher in the NACT group than in the PDS group, 972 IU/ml and 499 IU/ ml, respectively. The PFS in the NACT group was 8 months (95% CI 6.4-9.5) and 18 months (95% CI 12.5-23.4) in the PDS group. The median OS was lower in the NACT group than in the PDS group, 25 months (95% CI 20.6-29.5) and 46 months (95% CI 32.9-62.1), respectively.

CONCLUSIONS

Preoperative CA-125 cut off value of 500 IU/ml is a promising threshold to predict a successful PDS.

Choosing the right timing for interval debulking surgery and perioperative chemotherapy may improve the prognosis of advanced epithelial ovarian cancer: a retrospective study

Background

Primary debulking surgery (PDS) is the main treatment for patients with advanced ovarian cancer, and neoadjuvant chemotherapy (NACT) is for bulky stage III-IV patients who are poor surgical candidates and/or for whom there is a low likelihood of optimal cytoreduction. NACT can increase the rate of complete cytoreduction, but this advantage has not translated to an improvement in survival. Therefore, we aimed to identify factors associated with the survival of patients who received NACT followed by interval debulking surgery (IDS).

Methods

A retrospective study was conducted in FIGO stage IIIC-IV epithelial ovarian cancer patients who underwent PDS or IDS in our center between January 1st, 2013, and December 31st, 2018.

Results

A total of 273 cases were included, of whom 20 were lost to follow-up. Progression-free survival (PFS) and overall survival (OS) of the IDS and PDS groups were found to be similar, although the proportion of patients in stage IV and serum carbohydrate antigen 125 (CA125) levels before treatment in the IDS group were significantly higher than that in the PDS group. Body mass index (BMI), CA125 level before IDS, residual disease after surgery, and the interval between preoperative and postoperative chemotherapy were all found to be independent prognostic factors for PFS; FIGO stage, residual disease after surgery, and CA125 level before IDS were independent prognostic factors for OS. We found that PFS and OS were both significantly longer in patients with normal CA125 levels before IDS and when the interval between preoperative and postoperative chemotherapy was < 35.5 days (IDS-3 group) than for patients in the PDS group.

Conclusions

The results suggested the importance of timely IDS and postoperative chemotherapy and potentially allowed the identification of patients who would benefit the most from NACT. Normal CA125 levels before IDS and an interval between preoperative and postoperative chemotherapy no longer than 5 weeks were associated with improved prognosis in advanced ovarian cancer patients.