Same thing that caused them in both my wives. Genetic predisposition. He should have a long healthy life...just needs to give up the risky physical toll. He gave it a shot...them reoccurring so soon is a stop sign.I wish this was my site. I'd permaban you after this asinine comment.
Back on topic, did they ever say what they thought caused them in the first place? I hope he gets well soon, hate it for such a wonderful guy.