Improving Sarcoma Outcomes: Target Trial Emulation to Compare the Impact of Unplanned and Planned Resections on the Outcome.

Simple Summary: In this study, we aimed to understand the association between two types of surgeries on sarcoma outcomes: surgeries that were planned with a clear understanding of the cancer (planned resections) and those that were performed unexpectedly, without prior knowledge that the tumor was cancerous (unplanned resections). Using the novel Target Trial Emulation framework, we assessed how these surgeries impact local recurrence-free survival, metastasis-free survival, cancer-specific survival, and overall survival. Our study found that patients who had unplanned surgeries were more likely to experience their cancer recur at the surgery site. However, there was not a substantial difference in how long patients survived after either type of surgery. Our findings highlight the importance of immediately referring patients to specialized sarcoma treatment centers where unplanned resections are less likely to occur to improve treatment outcomes and provide evidence to guide better management strategies for sarcoma. This study follows the Target Trial Emulation (TTE) framework to assess the impact of unplanned resections (UEs) and planned resections (PEs) of sarcomas on local recurrence-free survival (LRFS), metastasis-free survival (MFS), cancer-specific survival (CSS), and overall survival (OS). Sarcomas, malignant tumors with mesenchymal differentiation, present a significant clinical challenge due to their rarity, complexity, and the frequent occurrence of UEs, which complicates effective management. Our analysis utilized real-world-time data from the Swiss Sarcoma Network, encompassing 429 patients, to compare the impact of UEs and PEs, adjusting for known prognostic factors through a multivariable Cox regression model and propensity score weighting. Our findings reveal a significantly higher risk of local recurrence for UEs and a short-term follow-up period that showed no marked differences in MFS, CSS, and OS between the UE and PE groups, underlining the importance of optimal initial surgical management. Furthermore, tumor grade was validated as a critical prognostic factor, influencing outcomes irrespective of surgical strategy. This study illuminates the need for improved referral systems to specialized sarcoma networks to prevent UEs and advocates for the integration of TTE in sarcoma research to enhance clinical guidelines and decision-making in sarcoma care. Future research should focus on the prospective validations of these findings and the exploration of integrated care models to reduce the incidence of UEs and improve patient outcomes. [ABSTRACT FROM AUTHOR]