CASE 55 History: A 37-year-old woman presents with right lower extremity numbness, weakness, and tingling in the midabdomen. 1. What should be included in the differential diagnosis? (Choose all that apply.) a. Ependymoma b. Tuberculoma c. Sarcoid d. Lymphoma 2. Which MRI signal characteristic would not be expected in secondary intramedullary spinal cord involvement of non-Hodgkin’s lymphoma (NHL)? a. Hyperintense T1 signal relative to cord b. Isointense T1 signal relative to cord c. Isointense T2 signal relative to cord 3. Which of the following imaging features would help differentiate intramedullary lymphoma from other causes of intramedullary lesions? a. Persistent gadolinium enhancement c. Location within the thoracic cord
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