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Table 4 Patients according to SGSCC

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

Tumor size (TED)

n (%)

  < 2 cm

8 (6)

 2 cm to 3.9 cm

81 (57)

 4 cm to 5.9 cm

51 (36)

  > 5.9 cm

2 (1)

Tumor sites

n (%)

  ≤ 3

74 (52)

  > 3

68 (48)

Vascular involvement

n (%)

  ≤ 1

73 (51)

  > 1

69 (49)

Intradural invasion

n (%)

 No

18 (13)

 Slight

38 (27)

 With brainstem compression

86 (60)

Recurrence after prior treatment

n (%)

 No

121 (85)

 After surgery

20 (14)

 After RT

0 (0)

 After Surgery and RT

1 (1)

Total Score

n (%)

  < 8

40 (28)

 8 to 12

83 (59)

  > 12

19 (13)

  1. SGSCC Sekhar Grading System for Cranial Chordoma, TED tumor equivalent diameter, RT radiotherapy