What Causes SIADH?

Type of Disorder

Examples

Brain or nervous system

An abscess in the brain

Bleeding (hemorrhage) within the layers of tissue covering the brain

Encephalitis (inflammation of the brain)

Guillain-Barré syndrome

Head injury

Hypothalamus disorders, including tumors (rare)

Meningitis

Stroke

Tumors

Lung

Acute respiratory failure

Pneumonia

Tuberculosis

Cancers

Brain cancer

Lung cancer

Lymphoma

Pancreatic cancer

Cancer of the small intestine

Other

Surgery

Undernutrition

SIADH = syndrome of inappropriate secretion of antidiuretic hormone.