The Syndrome of Inappropriate Antidiuresis	

The syndrome of inappropriate antidiuresis (SIAD) is a common cause of hyponatraemia; it falls into the category of normovolaemic (i.e. clinically normal extracellular volume) hyponatraemia. 

See later:
• Types of Hyponatraemia
• Features of SIAD
• Causes of SIAD
• Types of SIAD
• Treatment of SIAD