To determine presenting features, treatment modalities and associated outcome following treatment of spinal dural arteriovenous fistulas in a tertiary centre.

Retrospective cohort study of patients with SDAVF assessed at a single tertiary referral centre, between 1999 and 2009. Medical records were used to identify intervention type, pre- and post-intervention Aminoff-Logue disability score (ALDS), recurrence rate, follow-up time and discharge status. Statistical analysis was performed using Wilcoxon signed rank.

26 patients were identified with 23 receiving intervention. Two were unavailable for follow up. Endovascular embolization was performed successfully in 13 patients, recurrence occurred in 6 of these, 3 of which were subsequently treated surgically. Surgery was the initial treatment for 10 patients due to either unsuccessful embolization attempt or proximity of the fistula to spinal artery feeders; only 1 of these recurred. ALDS-gait reduced (improved) by a mean of 0.33 points following intervention but this was not statistically significant (P=0.0645). There was negligible change in micturition and bowel ALDS. Improvement in ALDS was greater in patients treated with surgery first and also in patients whose fistula did not recur. Mean follow-up was 38 months with 56% of working age patients returning to work.

Both embolisation and surgery achieved the primary aim of reducing disease progression, leading to an improved ALDS. Outcome was superior if initially treated surgically and recurrence occurred more frequently in patients treated endovascularly. The small number of patients in our cohort emphasise the need for further studies into this group of patients.