ODP332 Maternal Central Diabetes Insipidus Immediately after Delivery, Owing to Vasospasm of the Internal Carotid Artery

Abstract Background Sheehan's syndrome is a cause of hypopituitarism during the postpartum period, but it rarely manifests immediately after birth. Clinical Case We report the case of a 30-year-old woman who delivered her second child, lost 1,050 mL of blood in the process, but did not receive a blood transfusion. A few hours after delivery, the patient complained of headache, nausea, and thirst, and her urine production increased to 9 L/day. No menstrual irregularities or abnormalities during pregnancy or childbirth had been reported. None of hypotension, external eye muscle paralysis, or visual impairment were identified on physical examination. The laboratory findings were low urine osmolality and high serum osmolality and sodium concentration. The concentrations of thyroid hormones, growth hormone (GH), and anti-diuretic hormone (ADH) were found to be low. The IgG4 concentration was not high (4.7 mg/dL; normal