Minimally Invasive Bowel Cancer Surgery

Overview

We know that finding out you need bowel cancer surgery can bring a rush of fear and uncertainty. We want you to know that you are in experienced hands, and that most people who go through this surgery do very well. The aim of the operation is straightforward: to remove the section of bowel containing the cancer, together with the nearby lymph nodes — small glands that can carry cancer cells. Mr Nguyen performs this through 3–5 small keyhole incisions rather than one large cut, which means less pain, a shorter hospital stay, and a quicker return to your normal life — all without compromising the thoroughness of the cancer removal. The exact operation depends on where in the bowel the cancer sits. It might be called a right hemicolectomy, anterior resection, abdominoperineal resection, subtotal colectomy, or small bowel resection — Mr Nguyen will explain clearly which one applies to you and exactly what it involves.

Who needs this procedure?

This type of surgery is recommended when there is a cancer, pre-cancerous growth, or serious problem in the bowel that needs to be surgically removed. Common reasons include:

• Confirmed bowel cancer (colorectal adenocarcinoma) — a cancer in the colon or rectum, whether caught early or at a more advanced stage, provided surgery can remove it completely
• Bowel cancer that caused a blockage and was first treated with a colonic stent (a small metal tube to open the bowel) — surgery follows once your bowel has had a chance to settle and you are better prepared
• Cancer that has come back after previous treatment, if it can be removed surgically
• Cancer that started in a polyp (a small growth found on a colonoscopy), where the margins need to be confirmed with a wider removal of the surrounding bowel
• Large or high-risk polyps (adenomas) that are too big or too complex to remove safely through a camera alone
• Complicated diverticular disease — for example, if a pouch in the bowel wall has burst, formed a fistula (an abnormal tunnel to another organ), or caused a collection of infection that cannot be managed any other way
• A blocked or narrowed bowel that needs a section removed to relieve the obstruction
• Bowel damaged by scar tissue (adhesions) from a previous operation, where leaving it would continue to cause problems

Benefits

Keyhole (minimally invasive) bowel cancer surgery is now the standard approach for most bowel cancers. Here is why that matters for you:

• The cancer is removed just as thoroughly as with a large open incision — large studies have confirmed that survival rates and cancer clearance are identical
• Smaller cuts mean a lower chance of wound infections and hernias forming later
• You will have less pain after the operation, and need fewer strong pain medicines
• Most patients go home in 3–5 days — compared with 7–10 days after open surgery
• You get back to normal life, work, and the people you love more quickly
• The smaller wounds and more careful handling of the bowel also mean a lower lifetime risk of scar tissue causing a blockage in future years

Risks & considerations

Every operation carries some risk — it is important you understand these before you go ahead. But please also know that serious complications are much less common than most people expect, and the team takes many careful steps to prevent them. Understanding the risks also helps you know what to watch for during your recovery, so you can get help quickly if something does arise.

• Anastomotic leak (the bowel join not sealing properly) — happens in around 3–5 in 100 operations. If it occurs, you may need a temporary stoma (a bag on your tummy) while the join heals, which can usually be reversed a few months later. Mr Nguyen will discuss your individual risk with you, as factors like your weight, nutrition, and whether you have had radiotherapy all affect this chance.
• Wound infection — affects around 3–5 in 100 patients; treated with antibiotics or local wound care, and almost always resolves fully
• A stoma (bag) — whether yours is temporary or permanent depends on where your cancer is and whether the bowel ends can be safely joined at the time of surgery. Mr Nguyen will discuss this clearly with you before the operation, so you are not surprised.
• Bladder or sexual function changes — in operations for rectal cancer, the nerves that control the bladder and sexual function run very close to where the surgery takes place. The risk of some effect on these functions varies considerably depending on how low down in the pelvis the operation is performed and whether radiotherapy was given beforehand — ranging from around 5% for higher operations to up to 30% for very low rectal surgery. Mr Nguyen uses a careful, nerve-sparing technique to protect these nerves wherever possible, and will discuss the relevant risk for your specific situation before surgery.
• Blood clots (deep vein thrombosis or pulmonary embolism) — you will be given compression stockings, blood-thinning injections, and encouraged to walk early. These measures together greatly reduce this risk.
• Needing to switch to open surgery — this happens in about 5–10 in 100 keyhole operations, usually because of scar tissue or an unexpected finding. It is not a complication — it is a careful decision made in your best interest, and the cancer removal is just as complete.

Before the procedure

• ERAS (Enhanced Recovery After Surgery) — a program of simple things like eating well, moving early, and managing pain carefully, all designed to help your body bounce back faster
• If you have any lung or breathing concerns, you may see a chest physiotherapist before the operation to help you prepare

On the day

• You will be admitted to your hospital (Austin Health, Warringal Private Hospital, or Epworth Eastern) on the morning of your surgery — the nursing team will welcome you and take you through every step
• You will be put to sleep under general anaesthesia by a specialist anaesthetist. You will not feel or be aware of anything during the operation. A thin tube to drain your bladder (a urinary catheter) may be placed while you are asleep, depending on the type of operation — you won't feel it.
• Mr Nguyen will make 3–5 small keyhole cuts and use a tiny camera and precision instruments to carry out the operation with careful, detailed technique
• The section of bowel containing the cancer is removed with a clear margin of healthy tissue around it, along with the nearby lymph nodes — this is how we ensure the cancer is fully cleared
• The bowel ends are usually joined back together with a stapled join (anastomosis) so you can use the toilet normally. Occasionally, if joining the bowel would not be safe at that time, a stoma (bag) is formed instead. Mr Nguyen will discuss this possibility with you before the operation.
• You will wake up in the recovery room with pain relief already running, surrounded by nursing staff. The ERAS recovery plan starts immediately — which means drinking fluids and sitting up earlier than you might expect, because this genuinely helps your recovery

Recovery & aftercare

• Days 1–2 in hospital: The nursing team will gently encourage you to sit up, take a short walk, and sip fluids. This might feel daunting on the first day — but moving early is one of the single most important things you can do for your recovery. Most people are surprised by how manageable it is.
• Days 3–5: Most patients are comfortable enough to go home, eating reasonably well, managing pain with tablets, and feeling better than they expected. That said, everyone recovers at their own pace — there is no pressure to rush.
• Mr Nguyen will see you for a follow-up appointment 2–6 weeks after your operation — this visit is at no charge to you. It is an important conversation where you will receive your pathology results, discuss what comes next, and have all your questions answered.
• The piece of bowel removed during surgery is sent to the pathology laboratory, where it is examined in careful detail. The results tell you and Mr Nguyen exactly what stage the cancer was, and whether the margins are clear. Depending on those results, you may be referred to a medical oncologist to discuss whether further treatment (such as chemotherapy) is recommended.
• After that, Mr Nguyen will arrange regular check-ups — usually at least every six months — including clinic visits, blood tests, imaging scans, and colonoscopy at set intervals. This ongoing monitoring is important: it gives you the best possible chance of catching anything early if it were ever to return.

Related patient guides

These guides are written in plain language for you and your family — covering what to look for, what to expect, and what questions to ask.