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Table 7 Comparison with older cohorts

From: Prognostic impact of the “Sekhar grading system for cranial Chordomas” in patients treated with pencil beam scanning proton therapy: an institutional analysis

 This study (n = 142)Weber 2016 (n = 151)Paris D’Orsay (n = 34)Heidelberg (n = 155)
Age (years)4243 (mean)5948
GTV (cc)26352470 (PTV)
Treatment for recurrence (%)15364435
GTR (%)13490
LC (%)75 (at 5 y)76 (at 5 y)83 (at 3 y)72 (at 5 y)
OS (%)83 (at 5 y)86 (at 5 y)91 (at 3 y)85 (at 5 y)
  1. GTV (cc) gross tumor volume in cm3, GTR gross total resection, LC local control, OS overall survival