Conceptually, the way we want to think about whether or not somebody is a candidate for resection
with liver cancer is to assess the tumor size, location, and metastases. This largely determines
whether or not technically, the mass is resectable. It was very important also to conceptually
incorporate the liver function and very importantly, the postoperative liver function.
Factors in determining resectability anatomically is the functional reserve of the liver after resection.
But of course, technically speaking, livers that are very close to vessels, lesions, and multiple lobes
may not be amenable to resection. Liver function and particularly Child’s Pugh or MELD’s classification
speak to the perioperative mortality and the liver reserve. Just because technically, you can resect
a liver mass doesn’t mean that the patient can tolerate the surgery. Who’s the best candidate:
small tumors, preserved liver function particularly postoperative liver function or residual liver function.
Generally, we prefer no hepatic vascular invasion and no metastases. Unfortunately, liver cancer
usually presents late and few patients are candidates for surgical resection alone,
whether it’s anatomic or liver function related. What if the patient is not a candidate for the resection?
I’ll give you a second to think about this. There are some options for patients who are not surgical candidates,
RFA and TACE. Let’s look at each individually briefly. Patients may also be candidates for transplantation.
Transarterial chemoembolization also known as TACE undergoes a very interesting concept.
As we know, the majority of hepatocellular cancer is supplied by the hepatic artery as opposed to
the remainder of the liver which is the majority is supplied by the portal venous system.
This is the theory behind transarterial chemoembolization. Cut off the blood supply.
Radiofrequency ablation is also an option. In radiofrequency ablation, radiothermal energy
is applied usually under ultrasound guidance intraoperatively. Radiofrequency ablation is appropriate
when resection may not be possible due to the location particularly close to important vessels.
Radiofrequency ablation works best if the lesion is less than 4 cm in size. What about transplantation?
Again, we’ve discussed the MELD score which was originally developed for allocation of transplantation.
Orthotopic liver transplant is appropriate for lesions less than 5 cm or cancer that involves three lesions
that are smaller than 3 cm. Transplantation is discussed elsewhere. Some of the important clinical pearls
to take home. Patients liver function status is an important predictor of survival.
Remember, hyponatremia or low sodium is a strong negative predictor for liver patients.
For your test, high yield information: Metastases is still the most likely lesions in the liver.
So remember, look for other lesions. This is particularly true if there are multiple lesions
and there’s a potential for primary cancer such as colon cancer. Thank you very much for joining me
on this discussion of liver cancer.