Background: Contrary to deeply located brain arteriovenous malformations (AVMs), superficially located AVMs are more likely to have transdural arterial communications (TACs). However, the clinical and radiologic characteristics of patients presenting with AVMs and TACs are poorly understood. The purpose of this study is to determine whether clinicoradiological features of cerebral AVMs differ according to TAC. Methods: Between 2002 and 2012, 438 consecutive patients with a brain AVM were treated in our hospital. Among them were 124 patients with superficially located brain AVMs who met the inclusion and exclusion criteria of our study. We retrospectively reviewed the clinicoradiological features of their TACs to explore the variation in characteristics. Results: Thirty-two of the 124 patients with a superficially located AVM (25.8%) had TAC. Radiologic findings of brain AVM images with TAC showed that TAC occurred significantly more frequently among larger AVMs (with vs. without TAC, 11.2 vs. 4.0 ml) and among diffuse AVMs (56.3 vs. 28.3%, p = 0.004). Clinical findings indicate that TAC was associated with chronic headache (43.8 vs. 12.0%, p < 0.001) and older age (43.1 vs. 36.6 years, p = 0.037). Conclusions: Brain AVM with TAC seems to be accompanied by distinctive clinical features, such as chronic headache and older age. Larger size and diffuseness of the AVM were also associated with TAC. Findings from this study and the prognostic significance of TAC should be further explored in a large prospective study.

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