PT - JOURNAL ARTICLE AU - Eitan Mirvis AU - Dunnya De-Silva AU - Atul Mehta TI - Hyponatraemia in patients with multiple myeloma AID - 10.1136/bcr-2015-212838 DP - 2015 Dec 11 TA - BMJ Case Reports PG - bcr2015212838 VI - 2015 4099 - http://casereports.bmj.com/content/2015/bcr-2015-212838.short 4100 - http://casereports.bmj.com/content/2015/bcr-2015-212838.full AB - Hyponatraemia is the most common electrolyte disturbance encountered in clinical practice. Several causes of hyponatraemia are recognised and in many patients the aetiology may be multifactorial. An important cause is water intoxication and this is often iatrogenic. We present three patients, all of whom suffered from multiple myeloma, who illustrate different aspects of hyponatraemia, its causes and management.