A case of posterior fossa dural arteriovenous fistulas successfully treated with transarterial embolization

A 40-year-old man was transferred to our hospital due to sudden headache while swimming in the pool. CT revealed cerebellar haematoma within vermis associated with subarachnoid haemorrhage (SAH). Digital subtraction angiography (DSA) showed dural arteriovenous fistulas (DAVFs) with venous pouch on the surface of cerebellar vermis. Fistulas were on the meningeal surface near the sinus confluence. Draining veins formed venous pouch invaginating into cerebellar vermis. Transarterial embolization (TAE) was performed under the concept that main feeder should be embolized last to occlude the DAVFs completely. Post-embolization 3D-CT showed the cast of N-butyl-cyanoacrylate (NBCA) in the fistulas as well as in the drainer. The good order of occlusion made the embolization complete.