This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
[{'content': 'A 45-yr-old female complains of progressive lower limb weakness, spasticity, urinary hesitancy. MRI shows intradural enhancing mass lesion. Most likely diagnosis is - \nSelect and explain. \nA. Dermoid cyst, B. Intradural lipoma, C. Neuroepithelial cyst, D. Meningioma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Among the given options, the only meningioma shows enhancement on contrast scans. "The radiologic image of a dural-based, extra-axial mass with dense, uniform contrast enhancement is essentially diagnostic, although a dural metastasis must also be considered. A meningioma may have a \'dural tail\' a streak of dural enhancement flanking the main tumor mass, however, the finding may also be present with other dural tumors." Ref : Harrison, 17/e p2605', 'role': 'assistant'}]