My step father went in for the biopsy on his liver this morning.
And it's benign! It's a fatty tumour that they will be keeping an eye on, but for the time being he is cancer free. They suspect that his feeling out of sorts is being caused by his galbladder, which despite probably needing surgery to remove it, is a much better outcome.
Thank you all for your thoughts, words and prayers. My family and I are feeling so much better.