Tape worm cysts.
Have had (unfortunately) lots of experience with them. About 12 yr. ago E Wa moose that was old had lots of those in it. Contacted the state vet and sent in pictures, and that's what she said it was. Their advice--don't feed it to your dog raw because they can get tape worms from it. Cook it good and you're fine. Cube the steaks to make it easier to remove the cycts.; 2nd moose in 2009 had a few cycts that most folks wouldn't notice, then found a few in mule deer in the last few years. The meat is ok, just cook it good. Also be careful where you dump scraps to keep it away from dogs. People can't get tapeworms from eating the meat, but can get it from dogs that eat the meat.
Thank the wolves and their move into the state.