Table 1.

Summarized clinical data of the clival and sacral chordoma patients.

Patient	Localisation	Age at diagnosis	Gender	Tumour Size (cm)	Histological subtype	Ki-67	Metastases	Recurrences	R-Status
C1	Clivus	35	male	0.4	NOS	≤10%	—	—	R2
C2	Clivus	45	female	2.3	NOS	≤10%	—	—	Rx
C3	Clivus	49	female	0.9	NOS	≤10%	—	—	R2
C4	Clivus	81	male	1.4	NOS	≤10%	—	—	R2
C5	Clivus	79	male	1.7	NOS	≤10%	—	—	R2
S1	Sacrum	60	female	12	NOS	≤10%	—	—	Rx
S2	Sacrum	78	female	18	NOS	≤10%	—	—	R1
S3	Sacrum	50	female	10	NOS	≤10%	—	—	R0
S4	Sacrum	74	male	7	NOS	≤10%	—	—	Rx
S5	Sacrum	45	female	7	NOS	≤10%	—	1	R1
S6	Sacrum	68	male	6	NOS	≤10%	—	1	R1
S7	Sacrum	69	female	17	NOS	≤10%	1	—	R1
S8	Sacrum	45	male	20	NOS	≥10%	1	1	R1
S9	Sacrum	70	female	13.6	NOS	≤10%	—	1	R0
S10	Sacrum	76	female	6	NOS	≤10%	1	1	R0
S11	Sacrum	74	female	13	NOS	≤10%	—	1	R1
S12	Sacrum	71	female	18	NOS	≤10%	—	1	R1
S13	Sacrum	70	male	3	NOS	≤10%	1	—	R2
S14	Sacrum	67	male	6	NOS	≥10%	1	>1	Rx
S15	Sacrum	75	male	6.5	NOS	≤10%	—	1	R1
S16	Sacrum	49	male	5.2	NOS	≥10%	>1	>1	NA
S17	Sacrum	77	male	2.5	NOS	≤10%	1	1	R2
S18	Sacrum	78	female	5.1	NOS	≤10%	—	1	R1
S19	Sacrum	54	male	4.5	NOS	≥10%	—	1	R2
S20	Sacrum	47	male	2	NOS	≤10%	—	—	R2
S21	Sacrum	29	male	2.9	NOS	≤10%	1	—	R1
S22	Sacrum	71	male	8	NOS	≤10%	—	—	R0
S23	Sacrum	83	male	50	NOS	≥10%	—	—	R2
S24	Sacrum	79	female	15	NOS	≤10%	—	—	R0

NOS not otherwise specified, R-Status residual tumour status, R0 no residual tumour, R1 tumour cells detected microscopically at the resection margin, R2 macroscopic detectable residual tumour, Rx R-status uncertain.