Yes Ive heard that If your liver to too fatty they wont continue with surgery .
Its normally postponed until weight is lost and liver is shrunk , so pre op u must be on a low fat diet and defo no alcohol.
My surgeon was cancelling ops before hand If u hadnt lost the required amount before surgery.
My dietician called and warned me So by god I made sure I lost that pre op weight

I asked about my liver after surgery , surgeon said my liver was perfect

I was suprised as my diet was bad before my pre op diet although I hardly drink .
Best wishes ...
AND good luck x