CASE 53 History: A 43-year-old man presents with burning pain in the left flank and numbness in the left leg for 1 year. 1. What should be included in the differential diagnosis? (Choose all that apply.) a. Astrocytoma c. Ependymoma e. Meningioma 2. What is the location of the lesion? b. Epidural d. Extraspinal 3. What is the most common intramedullary tumor in adults? a. Astrocytoma b. Ependymoma c. Metastasis d. Schwannoma 4. All of the following intramedullary lesions have been shown to cause superficial siderosis of the central nervous system except: b. Ependymoma d. Sarcoid

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