Comparison is made to the previous MR scans. The previously noted mass lesion lying in the left pars triangularis has increased in size progressively along the time. The appearances do not suggest an area of demyelination. The lesion is well demarcated and measures approximately 15 x 10 x 14 millimetres. No surrounding vasogenic oedema. MR perfusion, spectroscopy show normal appearance. No contrast enhancement is identified. Appearances suggest either a low-grade glioma or an area of cortical dysplasia. The relative homogeneous appearance of the lesion is against a diagnosis of ganglioglioma or DNET.