How much of your liver can be safely removed? | CION Cancer Clinics

In a healthy liver, surgeons can often remove more than half, and sometimes a good deal more. The safe amount is set by what is left behind: that part must be big enough and healthy enough to do the whole liver's work while it grows back.

Why there is no single figure for everyone

Two people can have the same tumour in the same place and be given different answers. One has a healthy liver. The other has a liver affected by fat, heavy alcohol use, hepatitis or months of chemotherapy. A damaged liver works less well, so the surgeon needs to leave more of it behind.

What goes wrong if too little is left

The main danger is that the remaining liver cannot keep up. Doctors call this liver failure after resection. It shows as yellowing of the skin, fluid in the tummy, confusion and problems with blood clotting. It is uncommon when the planning is careful, but it is serious, and avoiding it is the whole point of the measurements your team makes.

Why a smaller operation is often preferred

Where the tumour allows it, surgeons try to spare as much healthy liver as they can. Removing only the sections that hold the tumour leaves more reserve behind, makes recovery easier, and keeps the door open for another operation later if the cancer returns in the liver. A bigger operation is chosen when the tumour's size or position leaves no safer way to remove it completely.

It does not always mean surgery is off the table. Often it means an extra step comes first, to make the part that stays bigger.

Growing the liver before the operation

The commonest way is portal vein embolisation. A radiologist blocks the blood supply to the side that will be removed, so the side that stays grows. Another route is a two-stage operation, where the liver is cleared in two separate trips to theatre with time to regrow in between.

Other treatments instead

Where growing the liver is not possible, the team may suggest ablation, which destroys small tumours with heat, or radiotherapy, chemotherapy or other medicines. Each has its own reasons and limits.

Who surgery may not suit at all

People with advanced cirrhosis, tumours spread widely through both sides, or health that would not cope with a long anaesthetic are often not offered resection. This page cannot tell you which group you are in. Only your team, with your scans and tests, can do that.

What to ask at the next appointment

Ask how much liver would be left, what share your team needs to see and why, and what would have to change for surgery to become safe. Bring the family member who will help make decisions.