Friday mystery object #195

Today I have a real challenge for you. This bone has a pathology that has significantly changed its appearance and it had no information associated when I found it. So far the best identification I have is very tenuous, so I thought it would be worth seeing if you had any ideas about what it came from:


Feel free to put your thoughts, observations and suggestions below. No need for cryptic clues today I think – this specimen is cryptic enough!