Table 3 Comparison between pediatric and adult pre-treatment chordomas based on whether the lesion was predominantly intra-osseous or extra-osseous

Clivus/skull base*

0 [0.0] (0.0)

11 [100.0] (73.3)

11 [100.0] (68.8)

3 [50.0] (21.4)

3 [50.0] (67.4)

6 [100.0] (10.0)

Clivus/skull base and cervical spine

0 [0.0] (0.0)

2 [100.0] (13.3)

2 [100.0] (12.5)

0 [0.0] (0.0)

1 [100.0] (2.2)

1 [100.0] (1.7)

Cervical spine

1 [100.0] (100.0)

0 [0.0] (0.0)

1 [100.0] (6.3)

0 [0.0] (0.0)

9 [100.0] (19.6)

9 [100.0] (15.0)

Thoracic spine*

0 [0.0] (0.0)

2 [100.0] (13.3)

2 [100.0] (12.5)

5 [100.0] (35.7)

0 [0.0] (0.0)

5 [100.0] (8.3)

Lumbar spine

0 [0.0] (0.0)

0 [0.0] (0.0)

0 [0.0] (0.0)

5 [71.4] (35.7)

2 [28.6] (4.3)

7 [100.0] (11.7)

Sacrococcygeal spine

0 [0.0] (0.0)

0 [0.0] (0.0)

0 [0.0] (0.0)

1 [3.1] (7.1)

31 [96.9] (67.4)

32 [100.0] (53.3)

Total

1 [6.3] (100.0)

15 [93.4] (100.0)

16 [100.0] (100.0)

14 [23.3] (100.0)

46 [76.7] (100.0)

60 [100.0] (100.0)