CASE 131 History: A 25-year-old man presents with neck pain and left arm numbness and tingling. 1. What should be included in the differential diagnosis? (Choose all that apply.) a. Lymphoma b. Ependymoma d. Astrocytoma e. Primitive neuroectodermal tumor (PNET) 2. Which of the following descriptions of the appearance of intraspinal PNET on CT and MRI is false? a. Isointense relative to cord on T1-weighted imaging b. Hyperintense relative to cord on T2-weighted imaging 3. Which of the following statements regarding central PNET and intraspinal PNET is false? a. Central PNET is more aggressive than intraspinal PNET. c. Both tumors are more common in males. d. Peripheral PNETs are related to Ewing’s sarcoma.
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