Many patients with Conn's disease have a high blood pressure that is difficult to control. This increases the risk of stroke, heart disease and kidney failure. When Conn's disease is caused by a tumor (benign adrenal adenoma), surgical resection is advised. This video demonstrates the case of a woman presenting with Conn’s disease. The preoperative work-up demonstrated a tumor located on the left adrenal gland. The patient presented an elevated aldosteronemia and the CT-scan demonstrated a 2cm left adrenal tumor. The patient is placed in a full lateral position, on the right side.