Figure 1.

The extent of initial tumour resection (1a and 1b), tumour progression prior to LITT (2a and 2b), intra-ablation (3a and 3b) and post-LITT (4a and 4b) extent of cytoreduction. MR images are arranged in pairs and are in ascending chronological order from top to bottom. (1a and 1b) T2 MRI without contrast illustrates the extent of temporal lobe resection after craniotomy for tumour resection. (2a and 2b) T1 with contrast MRI shows the tumour progression (2a) and associated vasogenic oedema (2b) prior to the second round of LITT. This MRI was performed at the onset of associated delirium. An enhancing mass primarily in the posterior mesial temporal lobe is seen with associated vasogenic oedema extending along the white matter tracks of the temporo-parieto-occipital junction. (3a and 3b) Intraoperative MRI illustrates the catheter trajectory as it extends into the mass located in the isthmus of the right-sided cingulate gyrus. A coronal section is included to illustrate the axial extent of the postablative zone centred medial to the atrium lateral ventricles. (4a and 4b) Decreased contrast enhancement in comparison to preoperative images.