CASE 72 History: A 57-year-old man with a 2-year history of back pain and progressive lower extremity numbness for the past 8 months presents with recent episodes of imbalance and urinary incontinence. 1. What should be included in the differential diagnosis? (Choose all that apply.) a. Arteriovenous malformation (AVM) b. Dural arteriovenous fistula (DAVF) 2. Which of the following spinal vascular lesions is most common in the general population? a. DAVF 3. Which MRI finding is most frequently observed in DAVF? a. Cord hyperintensity on T2-weighted images d. Abnormal intradural (subarachnoid) vessels 4. What is the cause of spinal cord enhancement on the T1-weighted image?
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