Table I.

Patients with tumors in the vicinity of the somatomotor strip. Pr.O. indicates previous operation

Pat	Sex/age	Histology	Pr.O	Location	Symptoms	Postop. symptoms < 1 week	Postop. symptoms > 1 month
1	F/19	neurofibrosarcoma	−	r. frontoparietal	focal seizures	sensorimotor paresis of l. lower limb	l. ankle weakness
2	M/59	astrocytoma GII	−	l. frontoparietal	weakness of r. limbs	transient r. hemiparesis, dysphasia	weakness of r. lower limb
3	F/37	AV‐malformation	−	l. frontoparietal	1 GM seizure, weakness and sensory defect of r. lower limb	r. sensorimotor hemiparesis	none
4	F/33	oligodendroglioma GII	−	l. frontoparietal	epilepsy	transient dysexecutive syndrome	none
5	M/28	astrocytoma GII	+	r. frontoparietal	epilepsy, sensory defect of l. foot	transient l. upper limb ataxia	clumsiness & sensory defect of left ankle and foot
6	M/57	astrocytoma GII	−	r. frontoparietal	focal seizures, weakness of l. lower limb	not operated
7	F/49	oligodendroglioma GII	+	l. posteriofrontal	focal seizures	transient r. hemiparesis, dysphasia	none
8	M/47	oligoastrocytoma GII	+	l. parietal	sensorimotor symptoms of r. upper body, dysphasia	as earlier	sensory defect of r. upper limb, dysphasia (less pronounced)
9	F/52	oligoastrocytoma GII	−	l. parietal	sensorimotor defect of r. limbs	weakness and ataxia of r. limbs, occasional dysphasia	none
10	F/54	hemangioma	−	r. frontoparietal	1 seizure	none	none
11	M/43	oligoastrocytoma GIII	+	l. temporal	r. hemiparesis, dysphasia, amnesia, epilepsy, decreased cogn. performance	transient worsening of hemiparesis, desorientation	weakness of r. lower limb, worsening of dysphasia, further decreased cogn. performance
12	F/51	astrocytoma GIII	−	r. frontal	clumsiness of l. footl. ankle foot drop	increase of l. foot weakness	corresponds to preoperative condition