Endocrine Abstracts

Case history: A 38-year-old man was referred with a 12-month history of recurrent bouts of transient hyponatraemia (serum sodium ranging from 115 to 125 mmol/l). Citalopram, which he was taking for depression, was discontinued, but the episodes continued.Initial investigations: Whilst symptomatic, and clinically euvolaemic, his biochemical profile was consistent with a syndrome of inappropriate antidiuresis (SIAD): sodium 124 mmol/l, potassium 4.5 mmol/l...