Hypercortisolism Manifesting as Severe Weight Loss, Hypokalemia, and Hyperglycemia in the Emergency Department

Abstract Background The concurrence of ectopic adrenocorticotropic hormone (ACTH) syndrome (ectopic Cushing syndrome) and cancer is uncommon in the emergency department (ED) setting, but a constellation of nonspecific signs and symptoms can suggest the presence of Cushing syndrome. Case Report A 65-year-old woman with diabetes visited the ED complaining of severe weight loss, generalized weakness, and hypokalemia. She was treated for hypokalemia and thrush. She was found to have a lung mass with a large pleural effusion. Upon discovery of the suspected malignancy, the patient was referred to the ED of a comprehensive cancer center, where she was diagnosed with ectopic Cushing syndrome and admitted to the hospital for further evaluation and treatment. Why Should the Emergency Physician Be Aware of This? The emergency physician should be able to recognize Cushing syndrome in cancer patients so that the paraneoplastic syndrome can be managed to avoid complications during cancer treatment.