Please choose the correct ending to complete the given sentence: Health: [header] How to know when to call the doctor after mastectomy surgery [title] Identify which surgical procedure you'll have. [step] The physical outcome of the surgery will depend upon how much tissue your surgeon removes. In some cases, muscle is also removed to prevent or remove cancerous tissue.

Ending1: Pre-op surgery involves inserting a sterile scalpel into the bone beneath the breast and cutting away the additional tissue in the incision. [substeps] Do not interrupt nursing during surgery and immediately clean any unused tissue. Ending2: [title] Begin eating solid foods shortly after surgery. [step] As the surgeon removes the intervening cells, you'll begin experiencing stomach pain and discomfort. Ending3: The surgery itself is routine and does not need to be done using regular equipment. [substeps] The surgeon will inject a salicylic acid solution in the palm of your hand which you lie on a flat surface while doing the surgery. Ending4: This will have an impact on the amount of pain you experience and the potential risks for post-surgical outcomes. You should discuss the various mastectomy procedures available with your surgeon before the operation.

Answer format: ending1/ending2/ending3/ending4