Abbreviation:<unk> 
Inappropriate or continued action of ADH despite normal/increased plasma volume→ impaired water excretion→ hyponatremia and hypo-osmolality
Syndrome of inappropriate antidiuretic hormone secretion
Inappropriate or hypersecretion from hypothalamus
Adrenal crisis
Infectious
Thyrotoxic periodic paralysis
Brain abscess
Diabetic ketoacidosis
Encephalitis, meningitis