CASE 159 History: A 63-year-old woman with a history of an ependymoma resected 10 years earlier presents with cervical myelopathy. 1. What should be included in the differential diagnosis? (Choose all that apply.) a. Malignant fibrous histiocytoma b. Meningioma d. Abscess e. Lymphoma 2. All of the following are sequelae of spinal irradiation that may be seen on MRI except: a. Hyperintense vertebra on T1-weighted images c. Abnormal cord signal intensity 3. The most common types of latent, postradiation, secondary malignancies include all of the following except: a. Osteosarcoma b. Fibrosarcoma c. Liposarcoma 4. What is the latency period between initial radiation therapy and diagnosis of radiation-induced sarcoma of the head and neck?
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