Removal of harmonically active tumour

Removal of harmonically active tumour.

[Ectopic ACTH secreting tumour causes hypernatremia and body’s homeo-static mechanism try to lower the level of high sodium and do a lesser degree though sodium remains in hypernatremic level or even it may be normal (this question does not mention any preoperative hyperna-tremia). Removal of that tumour results in negative sodium balance for time being which results hyponatremia while gradually it tends to rise again to normal level