Classification and microsurgical treatment of foramen magnum meningioma

Table 2 The classification and choice of surgical approach of the 76 foramen magnum meningiomas

Classification ABS	Cases	Classification SIM	Cases	Surgical approach	Cases
A	47	S	10	Paracondylar far lateral approach^a	5
				Basic far lateral approach	3
				Supracondylar far lateral approach extension	2
		I	29	Basic far lateral approach	21
		I	29	Transcondylar far lateral approach extension	8
		M	8	Basic far lateral approach	4
				Transcondylar far lateral approach extension	2
				Supracondylar far lateral approach extension	2
B	8	S	4	Suboccipital midline approach	8
		I	1
		M	3
S	21	S	5	Paracondylar far lateral approach	2
				Basic far lateral approach	2
				Supracondylar far lateral approach extension	1
		I	9	Basic far lateral approach	2
		I	9	Suboccipital midline approach	7
		M	7	Basic far lateral approach	5
		M	7	Suboccipital midline approach	2

^aThe paracondylar far lateral approach is the same as the basic far lateral approach, which does not remove the posterior atlas tubercle

ISSN: 2057-4967