Objectives: The goal of this study was to identify the survival benefit of chemotherapy in craniomaxillofacial osteosarcoma (CMFO) patients based on a US population.
Materials And Methods: The Surveillance, Epidemiology, and End Results (SEER) database was used to select patients with CMFO from 1988 to 2016. Age and tumor size were grouped by X-tail. Cox analysis were used to estimate hazards ratios (HR) among patients. All of patients were divided into two cohorts by using Propensity Score Matching (PSM) method to evaluate the effect of chemotherapy. All prognostic factors were included in the nomograms which predict the median survival time.
Results: 410 patients were included in our study. The results of survival rate, Kaplan-Meier and Cox regression were showed no significant difference between the group of chemotherapy performed and the group without chemotherapy. PSM analysis also demonstrated the limited survival advantage of chemotherapy. Moreover, all factors were further incorporated to construct the novel nomograms and its concordance indices (C-index) for internal validation of OS prediction were 0.749 (95 %CI:0.731-0.767).
Conclusions: Our study did not show the advantage of chemotherapy on the overall survival outcome of CMFO. Although neoadjuvant chemotherapy was currently recommended in clinical treatment, more rigorous randomized controlled trials are still needed. Nomograms would assist clinicians in making more accurate survival evaluation and choosing the optimal medical treatment.
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