Scrotal Hernia 100% I had a big 7 with this same condition last year. Some pictures it would be more swollen than others. I found a case study online from either 1974 or 72 that documented this condition. They had a dead buck that looked healthy other than a giant sack. My 7 from last year disappeared a week before bow season. No one around killed him. I do believe their blood becomes septic/sepsis then they die.
https://watermark.silverchair.com/0...wsK4QTjUup7Gf_2HxqK8vxHwfpqSmIHywQDGyOnInTa2m
https://watermark.silverchair.com/0...wsK4QTjUup7Gf_2HxqK8vxHwfpqSmIHywQDGyOnInTa2m