“…In general, the most common fluid and electrolyte abnormalities observed after brain surgery in children relate to serum sodium levels, with hyponatraemia secondary to either the syndrome of inappropriate diuretic hormone (SIADH) secretion or cerebral salt wasting syndrome, and hypernatraemia caused by diabetes insipidis (DI) [233][234][235][236]. In one series of 79 children, for example, water and sodium disorders were noted in 36 (46%): 23 (29%) with DI, 12 (15%) with SIADH, and a single patient with cerebral salt wasting [236].…”