Inappropriate antidiuretic hormone secretion

What it means

A state of increased circulating antidiuretic hormone despite hyponatremia and hypo-osmolality with normal or increased plasma volume.

Common etiologies of inappropriate antidiuretic hormone (ADH) secretion include nervous system disease, cancer, pulmonary disease, and as a side effect of a medication. This term is meant to refer to the inappropriately high level of ADH and not to the full syndrome of inappropriate antidiuretic hormone secretion (SIADH), which is considered a disease entity rather than a phenotypic feature.

Rare diseases that can present with this7

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Inappropriate ADH secretion · SIADH · Syndrome of inappropriate antidiuretic hormone secretion