Syndrome of inappropriate secretion of anti-diuretic hormone (SIADH)Central nervous system (CNS); infections, trauma, surgery, shunts, hypoxic ischemiaPulmonary; pneumonia, effusions, positive pressure ventilation, asthma, tumorsDrugs; carbamazepine, vinca alkaloids, narcotics, aspirin, ecstasy, selective serotonin reuptake inhibitorsTumors; leukemia, lymphoma, NeuroblastomaAdrenal insufficiencyCNS diseasePulmonary diseaseIncreased water intake; dilute infant formula, polydipsia, near drowning, iatrogenic hypotonic fluid administration. Here, AVP is linked to susceptibility to pneumonia measurement.