Abstraet: We presenta patient who had progressive paraparesis. Left lateromedial disc herniation was diagnosed at TI0 to TI 1 level on MR imaging. This was operated on, but 3 months later paraparesis worsened and then a suspicion of spinal vascular malformation arose. Spinal angiogram showed dural arteriovenous fistula at TI 1 level on the right side. This was operated on, and the patient's clinical condition improved. This case shows how difficutt the diagnosis of spinal dural arteriovenous fistulas may be. Bandscheibenvorfall -Brustwirbelk6rper 9 Arterioven6se FistelSpinalangiographie S ymptomatic thoracic disc herniation is a rare lesion which accounts for about 1% of all symptomatic spinal column disc herniations [9]. Spinal vascular malformations ate also uncommon disorders: 3% to 16% of all spinal space occupying lesions. About 35% of these vascular malformations ate dural arteriovenous fistulas [2]. Both disc herniation and vascular malformation may produce symptoms of progressive myelopathy [ 1,11]. We presenta patient with progressive paraparesis who had left thoracic disc herniation and right dural arteriovenous fistula at TI() to Tl l level. Case Report A fifty-three-year-old man had had progressive parapatesis but no radicular pain, for at !east 6 months, and after that sought medical advice. MR imaging revealed 96