Gallbladder surgery is actually quite common. Removing the gallbladder because of gallstones is done frequently even at local hospitals. But sometimes, after the removed gallbladder is sent to the pathology lab, a few days later comes a call saying "cancer cells are seen." And you had thought you were simply operated on because of stones. This is called gallbladder cancer found by chance, or in medical terms, incidental gallbladder cancer. When you actually receive such a notice, your mind goes blank. The gallbladder is already gone, yet it is cancer - so is it all over?
First, there is something that, once you know it, puts your mind a little more at ease. Gallbladder cancer found by chance is generally caught earlier than gallbladder cancer that brings you in because of symptoms. It means it was snagged during gallstone surgery, so in many cases it is at a stage before it has spread deeply. So it is not a reason to despair outright. There is, however, one key point on which things divide: how deep into the layers of the gallbladder wall the cancer has burrowed. When doctors speak of T1a, T1b, T2 and so on, that is exactly the marker showing this depth of invasion. If it is a very early stage, lingering only in the mucosa, simply having removed the gallbladder may complete the treatment.
On the other hand, if it has gone beyond the muscle layer of the wall and deeper, the story changes. In this case, removing only the gallbladder in the first surgery may not be enough, so additional surgery - a so-called repeat operation - that also removes part of the surrounding liver and lymph nodes is considered. You may think, "It is already removed, and you are going to do it again?" but that is because the first surgery was entered into thinking it was just gallstones, so from the standpoint of cancer it may not have been adequately cleared. That is why it is natural for incidental gallbladder cancer to flow toward being re-evaluated at a large hospital with a separate hepatobiliary-pancreatic surgery department and ample surgical experience, rather than at the place of the first surgery.
What is needed for the next decision is precise examination. Abdominal CT or MRI, and in some cases a PET scan, are used to see whether there is any trace of cancer remaining or having spread elsewhere. And what is truly important is having the tissue slides from the first surgery re-read at the hospital you transferred to. Even looking at the same tissue, the interpretation of the depth of invasion or the state of the resection margin can differ slightly from one pathologist to another, so this re-review result often becomes the fork in the road of whether or not to do repeat surgery. Even if it feels cumbersome from the patient's side, this step must not be skipped.
There are also practical things to take care of. If you obtain the pathology report and the surgical record from the hospital where you had the first surgery, and if possible borrow the tissue slides as well, you save a great deal of time at the hospital you transfer to. Gallbladder cancer is a disease that can progress if you drag out the time too much, so once you receive the notice, it is better to book an outpatient appointment at a large hospital and get moving within a week or two. And try not to dig through the internet alone too much. Even with the same gallbladder cancer, the path of someone who is simply done and someone who needs additional treatment is completely different depending on the depth of invasion, so it is common for another person's case not to match your own.
What is written here is a general explanation, so it does not apply exactly to everyone. The most accurate thing is to take your own pathology report and confirm it directly while having a hepatobiliary-pancreatic surgery consultation.