Interesting, lots of scarring - fibrosis, so a long term problem. Any other details such as age condition and other lesions in the caracase. A section for histology would be useful
There is no way that I would let that animal enter any food chain, not even my dogs! The liver filters the blood and has a huge blood supply. So in my mind that means that whatever caused those cysts and scarring is in all the body tissues! Bury it !
Assuming all else was normal, it could be OK to eat. You can get this sort of response to fluke in cattle, although its less common in deer. The liver is great at coping with damage, so I can well believe this animal was normal as I can still see normal looking tissue.
Reminds me of the time when I worked in Leeds, opposite the Leeds General Infirmary. The Mortuary was on the ground floor, as was the canteen. Every now and then there would be Liver and Bacon lunch specials.