Fig. 4

a Sagittal T2-weighted sequence in a 68-year-old woman with mild weakness and dysaesthesia of the left leg demonstrates an intradural, extramedullary mass anteriorly at T5, which displaces the spinal cord posteriorly, resulting in severe narrowing of the central spinal canal. b Post-contrast sagittal T1-weighted sequence in the same patient as a demonstrates homogeneous enhancement. The histological diagnosis at surgery was a meningioma