Arteriovenous fistula

[meo0ow]

My brother is now 18 years old. He previously had a blood tumour at his left forearm and has undergone several surgeries to remove the tumour since 2001. However, the tumour could not be completely removed and kept recurring. Due to the many operations done, there has been an arteriovenous fistula (the linkage between artery and vein) developed at his left forearm. This "blood pool" has recently grown exceptionally fast. After consulting many doctors, we reached the decision to carry out an endovascular occlusion and an embolisation of major feeder vessels. However, the area swelled back again 2-3 days after the operations. Now my brother is experiencing pain and discomfort. We are desperately looking for advices regarding this medical problem from all over the world. Please lend us your helping hand in any way possible. Thank you very much!