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Table 1 Patient characteristics

From: The preliminary results of proton and carbon ion therapy for chordoma and chondrosarcoma of the skull base and cervical spine

Parameter Total N = 91(%)
Age (years)/ Median (range) 38(14–76)
GenderFemale40(44.0)
 Male51(56.0)
HistologyChordoma77(84.6)
 Chondrosarcoma14(15.4)
Tumor siteSkull base85(93.4)
 Cervical spinal6(6.6)
KPS scores10026(19.8)
 9047(51.6)
 8018(19.8)
GTV/Median (range, cc) 37.0(1.6–231.7)
 ≤60 cc62(68.1)
 >60 cc29(31.9)
Brainstem compressionNo32(35.2)
 Abutment14(15.4)
 Yes45(49.5)
Optic apparatus compressionNo51(56)
 Yes40(44)
Any compressionNo22(24.2)
 Yes69(75.8)
Symptomheadache45(49.5)
 cranial nerve injury68(74.7)
 endocrine dyscrasia8(8.8)
Recurrent diseaseNo46(50.5)
 Yes45(49.5)
Re-radiotherapyNo77(84.6)
 Yes14(15.4)
Number of surgeries149(53.8)
 231(34.1)
 ≥311(12.1)