Turkish Neurosurgery 2016 , Vol 26 , Num 3
Unruptured Epileptogenic Brain Arteriovenous Malformations
Yong SUN1, Ren-Fu TIAN2, Ai-Min LI1, Xi-Guang LIU1, Jun CHEN1, Hui SHI1
1The First People’s Hospital of Lianyungang City, Department of Neurosurgery, Jiang Su, China
2Central Hospital of Enshi Autonomous Prefecture, Department of Neurosurgery, Enshi, Hubei, China
DOI : 10.5137/1019-5149.JTN.9190-13.1 AIM: To determine whether specific clinical and radiographic factors predispose arteriovenous malformations (AVMs) presenting with seizure and to predict the seizure risk for individual AVM patients.

MATERIAL and METHODS: Clinical features and cerebral angiograms of consecutive 45 unruptured AVM patients who were diagnosed in our center in a 2-year period were reviewed. Patient data (analysis cohort) was used to determine risk factors for seizure and to construct epileptogenic AVM groups. These risk groups were tested with the second half of the patient data (test cohort).

RESULTS: Among 45 unruptured AVMs (47.9%), initial seizures occurred in 20 unruptured AVMs (44.4%). Two of these 20 patients had a bleed in 117 patient-years for an annual bleed rate of 1.7%. There was no significant difference in hemorrhagic risk between epileptogenic AVM and asymptomatic AVM (P=0.918). Multivariate analysis revealed 2 factors associated with seizure: frontal and temporal AVM locations (P<0.001) and a compact AVM morphology (P=0.003).

CONCLUSION: Analysis of a group of unruptured AVMs demonstrated that epileptogenic AVMs have an annual hemorrhage risk similar to that of the asymptomatic AVMs. Frontal and temporal AVM locations and a compact AVM morphology were significantly associated with epileptogenic AVMs. Keywords : Cerebral arteriovenous malformation, Seizure, Hemorrhage

Corresponding author : Ai-min L, almylee@sina.com