This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal Radiology, Subject name: Radiology
On MRI, the differential diagnosis of spinal cord edema is: 
Select and explain. 
A. Myelodysplasia, B. Myelomalacia, C. Myeloschisis, D. Cord tumors
B: Myelomalacia
Answer: B: Myelomalacia 
Explanation: Myelomalacia is a increased T2w signal in the spinal cord where the spinal cord is atrophic with gliosis producing small and bright appearence of spinal cord