This is usually performed if the adrenal tumour is very large or is likely to be a cancer. Open adrenalectomy is generally performed under a general anaesthetic. Open operations may be performed through the back, the flank, or the abdomen. In all cases a skin incision is made and the underlying muscles divided. The adrenal gland is located and removed with great care being taken not to injure nearby structures such as the major veins in the abdomen. The muscles are then put together again and the skin incision is closed with sutures that will either absorb or be removed soon after your operation.