Hyperthyroidism is usually caused by multinodular diffuse enlargement of the gland in Graves disease and can be associated with pregnancy. Ideally, appropriate medical therapy establishes a euthyroid state prior to anesthesia. However, if emergency surgery becomes necessary in an unprepared patient, the anesthesiologist must avoid situations that may exacerbate the disease and should prevent thyroid storm during perianesthetic period. In this case, a 26 years old female with poorly controlled thyrotoxicosis was scheduled for emergency Cesarean-section. The patient was successfully managed by epidural anesthesia and discharged uneventfully at the 9th postoperative day.