Table 5.

Detailed description of 24 true positive findings in patients operated on for spine tumors

True positive cases
Patient	Region		Pathology	Surgery	Duration (h)	IOM modalities	IOM-baseline	IOM-changes	Neurological deterioration	Duration	Recovery
T.J., m, 55 years	e	L4-S2	Carcinoma metastasis	Decompression, complete tumorexcision	4.8	cmEP, ncEP, in situ stimulation, BCR	Pathological cmEP and ncEP	Progressive alteration of all cmEP leg right	Deterioration of pre-existing radiculopathy L4&5 right	Exitus letalis after 2 months	No
E.D., f, 50 years	e	L3&4	Carcinoma metastasis	Complete tumorcorpectomy ventral, fusion dorsal	6.5	csEP, cmEP, smEP, ncEP, nsEP, cont EMG	All available	Progressive deterioration of cmEP and smEP left leg	Radiculopathy L4&5 left	5 months	Exitus letalis after 8 months
S.F., m, 59 years	e	L3	Carcinoma metastasis	Complete tumorexcision and fusion dorsal	4.2	csEP, cmEP, nsEP	All available	deterioration of cmEP	Proximal weakness of legs	2 days	complete
T.W., m, 56 years	e	C0-C3	Hemangiopericytoma, recurrence	Decompression of myelon, partial tumorresection	9.3	csEP, cmEP, ncEP, in situ stimulation	All available	Alteration of cmEP trapecius muscle left	Mild accessory nerve paresis	4 days	complete
Z.N., m, 67 years	e	L1-S1	lipomatosis	Decompression and complete excision	4	csEP, cmEP, smEP, nsEP	All available	Loss of ncEP peroneal nerve left	Sensible radiculopathy S1 left	2 weeks	complete
B.M., m, 44 years	e	L4-lumbosacral plexus	liposarcoma	Complete excision from dorsal	4.3	cmEP, ncEP, in situ stimulation, BCR	All available	Loss of cmEP TA&AH left, loss of ncEP PN&TN left	Ischiadic palsy left	12 h	complete
S.S., f, 33 years	id-em	L2-S3	ependymoma	Complete resection from dorsal	7	cmEP, in situ stimulation, ncEP,	All available	Deterioration of cmEP VM left	Quadriceps-paresis left	1 day	complete
K.S., f, 26 years	id-em	S2-S5	gangliopericytoma	Complete resection from dorsal	7	cmEP, smEP, ncEP, in situ stimulation, BCR	All available	Deterioration of cmEP PL left	Mild radiculopathy L5 left	1 day	complete
E.P., m, 72 years	id-em	L3	neurinoma	Complete excision from dorsal	2.8	cmEP, ncEP	All available	Deterioration of PN and FN sensory EP left	Mild radiculopathy L4 left	2 days	complete
S.R., f, 56 years	im	C0-T1	Congenital tumor with ACM I and Syrinx	Decompression dorsal	3.8	csEP, cmEP, ncEP	All available	Deterioration of ncEP MN left	Numbness left arm	1 hour	complete
C.Y., m, 43 years	im	L1-S2	ependymoma	Excision complete from dorsal	7.6	csEP, cmEP, ssEP, nsEP, ncEP, in situ Stimulation, cont EMG, BCR	All available, but pathologic	alteration of cmEP leg right	Weakness right leg	6 hours	complete
K.A., m, 36 years	im	L3-S1	ependymoma	Complete excision from dorsal	7.5	cmEP, smEP, nsEP, BCR,	All available, but all pathologic	Alteration of cmEP left leg and loss of BCR right	Weakness left leg	2 months	complete
D.M., m, 38 years	im	T10&11	Lipofibroma	Partial excision from dorsal	6	csEP, cmEP, smEP, ssEP, nsEP, ncEP, in situ stimulation	All available, but pathologic	Alteration of cmEP TA and AH right>left	Radiculopathy L5 und S1 right > left	6 months	Recovery to pre-existing deficits
F.N., f, 27 years	e	T1-T3	Aneurysmatic cyst	Complete tumorvertebrectomy and fusion dorsal	5	csEP, cmEP, ncEP, nsEP, cont EMG	All available	Complete loss of all cmEP after columnotomy.	paraplegia	4 hrs	Complete
F.M., f, 66 years	id-em	T12-L1	Meningeoma recurrence	Complete tumorexcision from dorsal	3.8	csEP, smEP, nsEP, ncEP, in situ stimulation	All available	Deterioration of cmEP and ncEP left leg	Mild deterioration of pre-existing paraparesis	2 weeks	Complete to pre-existing deficits
S.B., f, 48 years	id-em	T7&8	Chronic leptomeningitis	Partial resection from dorsal	3.3	csEP, cmEP, ssEP, nsEP	All available	Deterioration of all motor and sensory EP	Mild deterioration of paraparesis	3 weeks	complete
G.M., f, 54 years	id-em	C3-C5	meningeoma	Complete resection from dorsal	7.8	csEP, cmEP, nsEP, ncEP	All available, but severly pathologic	Deterioration of sensory and motor EP left	Deterioration of pre-existing spasticity and ataxia	3 months	complete
P.M., f, 53 years	im	C0-T2	Congenital tumor with ACM I and Syrinx	Decompression C0-C2	4.5	cmEP, ncEP	All available, but pathological	Deterioration of ncEP MN bds	Deterioration of ataxia	3 weeks after ventriculoperitoneal shunt implantation	Recovery to pre-existent deficits
S.H., f, 22 years	im	C0-T4	Congenital tumor with ACM I and Syrinx	Decompression from dorsal	4.3	csEP, cmEP, nsEP, ncEP	All available	Loss of ncEP MN left and alteration of ncEP TN left	Hemiataxia left	1 month	complete
R.P., m, 51 years	im	C0-T12	Congenital tumor with ACM I and Syrinx	Decompression dorsal (Shunt)	2.8	cmEP, ncEP	All available, but pathological	Deterioration of ncEP TN and MN left	Hemiataxia left	3 months	complete
S.I., f, 80 years	im	C1-C5	ependymoma	Complete excision from dorsal	5.3	csEP, cmEP, ssEP, nsEP, ncEP, cont EMG	All available, but strongly pathologic	Loss of ncEP MN and cmEP BR bilateral and cmEP ADM left	Sensomotor tetraparesis right > left	6 months	Recovery to pre-existing deficits
S.E., f, 87 years	im	C5-T1	ependymoma	Partial resection from dorsal	5	csEP, cmEP, smEP, ssEP, nsEP, ncEP	All available, but pathologic	Alteration of all motor EP	Mild increase of spasticity	3 weeks	Recovery to pre-existing deficits
F.Pl., m, 56 years	im	C3-C5	neurinoma	Complete resection from dorsal	5	csEP, cmEP, ncEP	All available, but pathologic	Loss of ncEP MN right, reduction of ncEP MN left	Increased ataxia right > left	4 months	Recovery to pre-existing deficits
M.L., m, 44 years	id-em	S1-lumbosacral plexus	ganglioneuroma	Decompression and complete excision, dorsoventral	12.3	cmEP, ncEP, in situ stimulation	All available	Loss of BCR and BAR right, ncEP TN right	Partial sphincter palsy	3 months	complete