Cushing Syndrome Secondary to Ectopic ACTH Production in Pregnancy: A Case Report

Ectopic adrenocorticotropic hormone production is an extremely rare cause of Cushing syndrome in pregnancy and is associated with significant morbidity. A 37-year-old multiparous woman at 32 weeks’ gestation presented with hypertension, anasarca, hypokalemia, and fetal distress requiring an urgent cesarean section. Her adrenocorticotropic hormone and cortisol levels were elevated, and high-dose dexamethasone failed to suppress them, suggesting ectopic adrenocorticotropic hormone production. Multimodality imaging did not identify a source, and she had urgent bilateral adrenalectomy for refractory severe hypercortisolism. Ectopic Cushing syndrome in pregnancy requires a high index of suspicion for diagnostic testing and prompt treatment to minimize maternal and fetal complications.