Collected Data will include age, sex, baseline diagnosis, neurological assessment at the various stages (admission at neuro-rehabilitation, at the time of a possible neurological deterioration, 7-10 days then 1-4 days before, 1-4 Days after cranioplasty, at the time of final discharge from the neuro-rehabilitation department), the results of the neurological imaging, the delay between craniectomy and cranioplasty, delay between the theoretic possibility of cranioplasty (if known) and the actual cranioplasty, complications related to cranioplasty and functional and cognitive outcome.