From an IM chat...

ME: "There's a problem with Claire's [from Heroes] powers. If she had a wound that goes through her, both parts of the wound should try to repair the opposite side in which case she'd have out of control flesh growth. It's as if her body repairs to a fixed template of her complete, healthy self -- but if her body repairs to a template, tell me this -- how does she age and grow?"

RESPONSE: "I don't know. I'm not a geek."