These tumors produce too much aldosterone, often resulting in high blood pressure. Patients are usually on several medications with increasing doses to control their blood pressure. Patients are frequently found to have low potassium because aldosterone directly affects our salt and water balance. As a result, patients can complain of muscle cramps and weakness. These tumors are benign and once removed, can result in significant improvement in blood pressure. These tumors can be small and often adrenal venous sampling is required to help determine the side of the aldosteronoma.