Abstract
PurposeAims to compare the prognostic performance of the number of positive lymph nodes (PLNN), lymph node ratio (LNR) and log odds of metastatic lymph nodes (LODDS) and establish a prognostic nomogram to predict overall survival (OS) rate for patients with endometrial carcinosarcoma (ECS).MethodsPatients were retrospectively obtained from Surveillance, Epidemiology and End Results (SEER) database from 2004 to 2015. The prognostic value of PLNN, LNR and LODDS were assessed. A prediction model for OS was established based on univariate and multivariate analysis of clinical and demographic characteristics of ECS patients. The clinical practical usefulness of the prediction model was valued by decision curve analysis (DCA) through quantifying its net benefits.ResultsThe OS prediction accuracy of LODDS for ECS is better than that of PLNN and LNR. Five factors, age, tumor size, 2009 FIGO, LODDS and peritoneal cytology, were independent prognostic factors of OS. The C-index of the nomogram was 0.743 in the training cohort. The AUCs were 0.740, 0.682 and 0.660 for predicting 1-, 3- and 5-year OS, respectively. The calibration plots and DCA showed good clinical applicability of the nomogram, which is better than 2009 FIGO staging system. These results were verified in the validation cohort. A risk classification system was built that could classify ECS patients into three risk groups. The Kaplan-Meier curves showed that OS in the different groups was accurately differentiated by the risk classification system and performed much better than FIGO 2009.ConclusionOur results indicated that LODDS was an independent prognostic indicator for ECS patients, with better predictive efficiency than PLNN and LNR. A novel prognostic nomogram for predicting the OS rate of ECS patients was established based on the population in the SEER database. Our nomogram based on LODDS has a more accurate and convenient value for predicting the OS of ECS patients than the FIGO staging system alone.
Highlights
Endometrial cancer is one of the most common gynecologic malignancies in the world
The International Federation of Gynecology and Obstetrics (FIGO) recommended that Endometrial carcinosarcoma (ECS) use the same staging system as endometrial adenocarcinoma, namely the 2009 FIGO staging system, and pointed out that the clinical pathological disease staging at the time of diagnosis is an important factor affecting the prognosis [6]
In order to compare different lymph node (LN) staging systems comprehensively and reasonably, we grouped continuous variables of the Positive lymph nodes (PLNN), lymph node ratio (LNR) and log odds of metastatic lymph nodes (LODDS) schemes into two classification levels according to best cut-off points
Summary
Endometrial cancer is one of the most common gynecologic malignancies in the world. More than 65,000 new cases were confirmed in the United States in 2020 [1]. The foundation of therapy for ECS is surgical resection, including total abdominal hysterectomy, bilateral salpingo-oophorectomy, and lymph node dissection, with or without combination chemoradiation [4, 5]. Adopting this aggressive surgical method, the local area recurrence rate is as high as 60%. The International Federation of Gynecology and Obstetrics (FIGO) recommended that ECS use the same staging system as endometrial adenocarcinoma, namely the 2009 FIGO staging system, and pointed out that the clinical pathological disease staging at the time of diagnosis is an important factor affecting the prognosis [6]. Studies pointed out that the 5-year overall survival rate for stage I or II ECS patients is 30–45%, and the 5-year overall survival rate for stage III or IV ECS patients is 0–10% [2, 6, 7]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
