Any wound on the surface? Antler gouge from fighting? Is it in the scent gland areas like perhaps one was plugged an infected? If "no" to both of those I have no idea what that is
If I report it to the PGC, they may issue me a new tag, but I'll have to relinquish the head! This was my first LR kill with my new rifle. Therefore, I'll have to take the loss on the meat!
See my ongoing shooting thread below for kill info.
I found a pus sack like that in a mule deer about 15 years ago. However, this one was in the hindquarters. The pus sack almost completely surrounded an arrow broad head!
I see that kind of thing all the time cutting wild game, usually an antler or tree puncture, sometimes you'll find a little hair ball in them, bullet, broadhead, another antler, tree branches, I've seen a lot!!