“…1,[7][8][9]12 At present, the most likely explanation for the onset of haematoma formation is a sudden variation in cerebral blood flow as a consequence of cerebral decompression. 1,2,[4][5][6][7][8][9][10][11][12][13][14][15] Xenon-enhanced CT studies have demonstrated that cerebral blood flow in patients with CSDH is diminished, particularly in the ipsilateral frontal cortex, 16 rolandic cortical region, 17 putamen and thalamus. 16,18 This is followed postoperatively by a progressive normalization of blood flow in these areas.…”