Methods:
We collected clinical data regarding patients aged <18 years
with SYST treated at Sun Yat-sen University Cancer Center between 2007
and 2018. We investigated prognostic factors of age, stage, initial
tumor size, pathological response to neoadjuvant chemotherapy and alfa
fetoprotein (AFP) in univariate and multivariate analysis. The
Kaplan-Meier method was used to estimate the relapse-free survival
(RFS).