This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
A 45 year old female presented with lower limb weakness, spasticity, urinary hesitancy and mid-dorsal intradural enhancing mass in Mill. What is the diagnosis – 
Select and explain. 
A. Lipoma, B. Meningioma, C. Dermoid cyst, D. Neuroepithelial cyst
B: Meningioma
Answer: B: Meningioma 
Explanation: The mass in question has the following information :


Middle-aged (45 years) women
Mid-dorsal (mid thoracic)
Intradural
Enhancing


All are features of meningioma.
Lipoma, Dermoid, and neuroepithelial tumors, i.e. gliomas (e.g. - astrocytoma) are intramedullary masses.