Hatfield-McCoy Feud possibly explained?

Just couldn't pass up posting this news item! Seems the McCoy clan might have an underlying genetic predisposition to having, well, a poor disposition:

No one blames the whole feud on the disease, but doctors say it could help explain some of the clan's behaviour.

"This condition can certainly make anybody short-tempered and, if they are prone because of their personality, it can add fuel to the fire," said Dr Revi Mathew, a Vanderbilt University endocrinologist treating a McCoy.

Von Hippel-Lindau disease can cause tumours in the eyes, ears, pancreas, kidney, brain and spine.

Roughly three-quarters of the affected McCoys have tumours of the adrenal gland.

Click here to read the Daily Telegraph article.