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Table 2: Procedural parameters, treatment results, follow-up, and outcome^{^a}
No. of treatment procedures 
    Total No. of treatment procedures 25
    1 treatment procedure per patient 19 (86.4%)
    2 treatment procedures per patient 3 (13.6%)
Selected feeder for embolization 
    Middle meningeal artery 18 (80.0%)
    Occipital artery 5 (24.0%)
    Others 2 (8.0%)
No. of embolization positions 
    1 20 (80.0%)
    ≥2 5 (20.0%)
Complications 
    Overall complications 5 (20.0%)
    Asymptomatic complications 3 (12.0%)
    Transient symptomatic complications 2 (8.0%)
    Symptomatic complications with permanent neurologic deficits 0 (0%)
Follow-up 
    Follow-up (mo) 18 ± 18
    Postinterventional angiography available 17 (77.2%)
    Postinterventional MRI available 22 (100%)
Angiographic outcome 
    Initial complete angiographic occlusion 14 (63.6%)
    Spontaneous occlusion after subtotal endovascular occlusion 5 (22.7%)
    Time from last treatment to diagnosis of spontaneous occlusion (mo) 3.5 ± 6.0
    Overall complete occlusion at last examination 19 (86.4%)
    Residual fistula at last examination 3 (13.6%)
Clinical outcome 
    Postinterventional mRS at discharge 1 ± 1
    Postinterventional mRS 6 mo after treatment 1 ± 1
    Complete symptom remission after treatment 15 (68.2%)
    Symptom relief after treatment 6 (27.3%)
    Stable symptoms after treatment 1 (4.6%)
    Worsening of symptoms after treatment 0 (0%)
↵a Data are presented as No. (relative frequency in %) or mean ± SD.