This is another syndrome involving AVP (ADH) that is now well recognized. It results from water retention due to secretion of AVP (ADH) when AVP (ADH) would not ordinarily be secreted. The criteria for IADH syndrome include (1) hyponatremia, (2) continued renal excretion of sodium despite hyponatremia, (3) serum hypoosmolality, (4) urine osmolality that shows […]