CASE 132 History: A 67-year-old patient presents with increasing intermittent back and leg pain over the last 2 months, which worsens when changing positions. 1. What should be included in the differential diagnosis? (Choose all that apply.) d. Liposarcoma e. Meningioma 2. What is the location of the lesion? c. Extradural d. Extraspinal 3. Which of the following findings is not helpful in differentiating this lesion from epidural lipomatosis? a. Location within the posterior epidural space b. Inhomogeneous signal on T1-weighted images d. Focal mass 4. Which of the following techniques is used to suppress the fat signal on the postcontrast T1-weighted image shown? a. Fluid attenuated inversion recovery (FLAIR) c. Frequency selective saturation
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