Whether unplanned excision on synovial sarcoma will influence the prognosis? An retrospective analysis of prognostic factors in 54 synovial sarcoma cases at a single center.

Objective: In this study, we examined the reason and prognosis of unplanned excision on synovial sarcoma.

Methods: We retrospectively analyzed 54 patients diagnosed with synovial sarcoma between March 2013 and February 2021, including 26 cases of unplanned excision surgery. Patients were divided into two groups based on whether they underwent unplanned excision. Then, factors such as gender, age, tumor size, tumor location, American Joint Committee on Cancer (AJCC) staging, unplanned excision, time of onset, duration of disease, radiotherapy, chemotherapy, amputation, local recurrence factors, and death were statistically evaluated.

Results: The results of a multivariate analysis revealed that the AJCC staging is an independent factor for patient prognosis. When patients were divided into two groups, those who had undergone unplanned excision and those who had not, statistical analysis revealed that there was no difference of survival between two groups, but tumor size and AJCC staging had statistical difference. To further explore the influences of unplanned excision, we performed propensity score analysis with 1:1 matching using the nearest neighbor matching method to balance the covariates between the two groups. There was no difference of survival between two groups after propensity score matching.

Conclusion: Unplanned excision is commonly performed in synovial sarcoma and do not impact the prognosis after extensive resection.