Skull Base Surgery in the Pediatric Population-The 2nd International Collaborative Study (1995-2015).
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BACKGROUND: The current study presents the efforts of a global collaborative group to review the management and outcomes of malignant tumors of the skull base in the pediatric population worldwide. PATIENTS AND METHODS: A total of 28 institutions contributed data on 3061 patients. From this, there were 64 pediatric patients (2.1%). Clinical variables, overall and disease-free survival (OS and DFS) outcomes, and multivariable factors associated with outcome were evaluated. RESULTS: The male-to-female ratio was 37:27 and the median [IQR] age at diagnosis was 14.0 [9.6-16.0] years. The most common malignancy was sarcoma (57.8%), followed by esthesioneuroblastoma (25.0%) and carcinoma (17.2%). Negative margins were achieved in 53.1% children. Dural invasion was associated with reduced OS and DFS. Adjuvant radiotherapy was associated with improved survival outcomes. CONCLUSIONS: Open approaches were widely used for pediatric skull base tumor resection in the period between 1995 and 2015 but we saw a rise in the use of endoscopic and combined techniques by the end of the period covered by this study. Our results may represent a transitional era in which alternative endoscopic techniques continue to expand.