any ideas

[North]

I lost a snake this afternoon, one of my favorites a 4 year old male Ball Python, he seemed in good health with no signs of stress or anything, temps etc were fine...he had just eaten for the first time since Dec, about 3 days ago .... upon inspection I found what looked like a small white string hanging from his rectum.. it was the last 2/3 of his hemipenes.. it seemed quite rotten and broke off at the last third which still looked like healthy skin...I have no real access to an autopsy here so thought I would ask and see if anyone had seen anything like this before. I did a fecal on all my snakes in December and found no signs of parasites so I don't think that was the culprit..