As we all know surgery of chordomas, especially of recurrent chordomas, is challenging and the authors should be congratulated for their thoroughly surgical planning and approaches, using elaborate pre- and intraoperative imaging, which is well described throughout the manuscript.
That is plenty and a challenge for many, but the other imaging modalities used are either standard fare in many centers (x-ray imaging, endoscopy) or do not need to be in adjacent rooms (PET scanning and angiography (can be done in the primary Or).