. Author manuscript; available in PMC: 2016 Apr 1.

Published in final edited form as: J Neurosurg Spine. 2015 Dec 18;24(4):644–651. doi: 10.3171/2015.7.SPINE15201

TABLE 2.

Summary of the chordoma characteristics

Variable	Value^*
Spinal location (n = 156)
Cervical	54 (35)
Thoracic	24 (15)
Lumbar	78 (50)
No. of vertebral levels spanned by tumor (n = 166)
1	97 (58)
≥2	69 (42)
Tumor grade (n = 150)
Low (Grade I)	94 (63)
High (Grade II)	56 (37)
Tumor size (cm)
Anterior-posterior (n = 122)	4.9 ± 3.1
Left-right (n = 122)	4.1 ± 2.4
Cephalad-caudad (n = 119)	4.3 ± 2.5
Tumor vol ellipsoid body (cm³) (n = 119)^†	87.7 ± 317.6
<20	42 (35)
20–59	40 (34)
≥60	37 (31)

Data are presented as number of patients (%) unless specified otherwise. Mean values are presented as mean ± SD.

^†

Tumor volume ellipsoid body = π/6 × height × width × depth.