<prompt> A 48-year old woman comes with bilateral progressive weakness of both lower limbs, spasticity and mild impairement of respiratory movements. MRI shows an intradural mid-dorsal midline enhancing lesion. What is the diagnosis?Intradural lipomaMeningiomaNeuroenteric cystDermoid cyst  <response>: CNS Tumor Intra-axial Extra-axial Neuronal Astrocytoma Glioma Lymphoma Pituitary Schwannoma Meningioma Ref: Harrison 19th edition Pgno: 602 