Table 1.

Details of patients who experienced instrumentation failure

No.	Age	Sex	BMI	Type of tumor	RT	Resection level	Broken parts in instrumentation failure	Duration after TES (mo)	Back pain	Neurological deterioration	Ambulatory	Revision surgery
1	39	M	24.0	thyroid cancer	no	T4	2 rods	42	+	–	yes	yes
2	63	F	21.0	thyroid cancer	no	T4, 5, 6	1 rod	74	+	–	yes	yes
3	57	F	22.3	parotid cancer	no	T5, 6	2 rods	92	+	–	yes	yes
4	59	F	22.6	breast cancer	yes	T6, 7	2 rods	24	–	bilateral leg weakness	no	yes
5	68	M	22.4	hepatocellular carcinoma	yes	T7	2 rods	51	–	bilateral leg weakness	yes	yes
6	24	M	22.0	leiomyosarcoma	no	T7,8	1 rod	29	+	–	yes	yes
7	41	F	16.4	synovial sarcoma	yes	T8, 9	2 rods	37	+	–	yes	yes
8	68	M	23.2	renal cell carcinoma	no	T8, 9	2 rods	18	+	–	yes	yes
9	59	M	24.2	renal cell carcinoma	no	T8, 9, 10	2 rods	11	+	–	no	yes
10	59	M	24.3	lung cancer	no	T8,9, 10	2 rods and cage	25	+	bilateral leg weakness	no	yes
11	66	F	18.4	esophageal cancer	no	T9	1 rod	17	+	–	yes	yes
12	26	M	27.0	epithelioid sarcoma	no	T10	2 rods	34	+	bilateral leg paresthesia	yes	yes
13	40	M	26.3	liposarcoma	no	T10	1 rod	38	–	–	yes	yes
14	45	M	23.6	chondrosarcoma	no	T10	1 rod	32	+	–	yes	yes
15	70	M	25.2	unknown	no	T10, 11	2 rods	11	+	–	no	yes
16	14	M	24.3	Ewing’s sarcoma	no	T12	2 screws	22	–	–	yes	yes
17	48	M	28.4	renal cell carcinoma	no	T12, L1	2 rods	19	+	bilateral leg paresthesia	yes	yes
18	66	F	22.4	breast cancer	no	L1	1 rod	18	+	–	yes	yes
19	16	M	22.8	chordoma	no	L1, 2	2 rods and cage	21	+	–	yes	yes
20	64	M	19.9	aggressive hemangioma	no	L2	1 rod	23	+	–	yes	yes
21	49	F	30.9	giant cell tumor	no	L4,5	2 rods	39	+	bilateral leg paresthesia	no	yes
22	25	F	17.2	giant cell tumor	no	L4	cage and 1 screw	31	+	bilateral leg paresthesia	yes	yes
23	50	M	32.3	lung cancer	no	L5	2 rods	24	+	bilateral leg pain	no	yes
24	21	F	24.3	giant cell tumor	no	T11	cage	24	–	–	yes	no
25	41	F	22.2	breast cancer	no	L3	2 screws	35	–	–	yes	no
26	70	M	20.8	renal cell carcinoma	yes	L3	1 rod	30	–	–	yes	no

BMI body mass index, RT radiation therapy