Stereotactic Radiosurgery with Neoadjuvant Embolization of Larger Arteriovenous Malformations: An Institutional Experience

Table 1

	𝑁	%
Gender
M	41	42%
F	54	58%
Age
Median in yrs	38.54
0–21	18	18.90%
22–40 yrs	32	33.70%
40–50 yrs	22	23.20%
50+	23	24.20%
AVM side
L	54	57%
R	41	43%
Initial hemorrhage
N	68	71%
Y	27	29%
Initial seizure
N	58	61.10%
Y	37	38.90%
Initial neurological exam
Intact	74	78.00%
Mild/moderate deficit	18	18.90%
Severe deficit (i.e., unresponsive)	3	3.10%
Location	𝑁	%
Frontal	19	20.00%
Temporal	24	25.30%
Parietal	26	27.40%
Occipital	9	9.40%
Cerebellum	8	8.40%
Thalamus, brainstem	9	9.40%
Size
Medium (3–6 cm)	80	84.20%
Large (>6 cm)	15	15.80%
Eloquence
Noneloquent tissue	24	25.20%
Eloquent tissue	71	74.80%
Venous drainage
Superficial	44	46.30%
Deep	51	53.70%
SM grade
3	48	50.50%
4	38	40.00%
5	9	9.50%
Pollock-Flickinger score
0–2.25	23	24.2%
2.25–3.5	24	25.3%
3.5–4.75	24	25.3%
>4.75	24	25.3%
Radiosurgery AVM scale
1	12	12.6%
2	46	46.3%
3	28	29.4%
4	11	11.6%