This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal system, Subject name: Radiology
[{'content': 'On MRI the differential diagnosis of spinal cord edema is - \nSelect and explain. \nA. Myelodysplasia, B. Myelomalacia, C. Myeloschisis, D. Cord tumors', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In Myelomalacia, the spinal cord is small and bright due to cord atrophy and gliosis There is no extrinsic compression in myelomalacia Myelomalacia is irreversible.', 'role': 'assistant'}]