Surgical resection of intradural extramedullary tumors in the atlantoaxial spine via a posterior approach

Table 1 The clinical data of the patients with intradural extramedullary tumor in the atlantoaxial spine

Patient	Gender	Age (yrs)	Affected level	Location	Tumor type	Tumor size (mm)	Complication	Follow up (mo)
1	F	54	Occiput-C1	Ventral	Meningioma	7		41
2	M	29	Occiput-C2	Ventrolateral	Schwannoma	11	CSF leaks	31
3	M	57	C1-C2	Ventral	Meningioma	8		28
4	F	37	C1-C2	Ventral	Schwannoma	7		34
5	F	51	C1-C2	Ventrolateral	Schwannoma	7		42
6	M	39	Occiput-C1	Ventral	Meningioma	6		32
7	M	61	C1-C2	Ventrolateral	Neurofibroma	8		26
8	F	48	Occiput-C2	Ventrolateral	Schwannoma	10		38
9	F	45	C1-C2	Ventral	Neurofibroma	6		42
10	M	59	Occiput-C1	Ventral	Meningioma	7	CSF leaks	36
11	F	43	C1-C2	Ventrolateral	Schwannoma	5		49
12	M	66	C1-C2	Ventrolateral	Schwannoma	6		26
13	M	52	C1-C2	Ventral	Meningioma	5		34

Pre: preoperative; post: postoperative; tumor size; maximum diameter within the spinal canal; CSF: cerebrospinal fluid.