Polydactyly

[conuly]

Apparently, this can be caused for no reason, or as part of a genetic disorder, or as part of an inocuous dominant gene. The extra digits are either useless or not. It is considered one of the more common birth defects.

Interesting.

Comments

[shoumagic.livejournal.com]

I always sort of figured it wasn't that uncommon because I can remember knowing about a few people who had had extra fingers and had them removed. Actually, I remember quite clearly in kindergarten that a boy I knew had an extra thumb. I still remember him coming up to me one morning telling me how he got it removed... He was so excited.