Endocrine Abstracts

History: A 62-year-old female presented to casualty with headache and hyponatraemia (Na 113 mmol/l) on the background of nausea and vomiting, preceded by sudden onset occipital headache 10 days previously. Other routine blood results were unremarkable apart from K 3.4 mmol/l.Biochemical investigations were consistent with SIADH. (Serum osmolality 233 mos/kg, urine 641 mos/kg, urinary Na 43 mmol/l). Early morning cortisol on admission was 828 nmol/l.<...