Fetal death due to upper airway compromise complicated by thyroid storm in a mother with uncontrolled Graves' disease: a case report.

Introduction: We report an unusual case of upper airway compromise complicated by thyroid storm in a pregnant woman with Graves' disease, ending with the in utero death of the fetus. This complication might have developed due to upper airway edema as a result of poorly controlled hyperthyroidism.

Case Presentation: A 41-year-old Turkish woman at 27 weeks' gestation suffering from Graves' disease was referred to our emergency department with a diagnosis of respiratory arrest. She was unconscious and had been intubated. Her laboratory results were compatible with thyrotoxicosis. The patient had suffered from respiratory difficulty for a long time and had stopped using her antithyroid medications after the first trimester of pregnancy. One day before, she had visited an obstetrician because her respiratory distress had increased. At that time, her fetus was still alive. She was given oxygen therapy and then sent home. With a presumptive diagnosis of thyroid storm, she was admitted to the intensive care unit and treated with aggressive medical therapy. The baby was found to be no longer alive and was delivered vaginally after labor induction. The mother was discharged 10 days later with maintenance therapy.

Conclusion: Hyperthyroidism during pregnancy warrants very close attention and should almost always be treated with appropriate antithyroid medications. Maternal respiratory distress in such patients can be an early sign of impending upper airway compromise and thyroid storm, which can endanger the mother and fetus unless prompt and aggressive therapy is initiated.