I wrote about Dede the Tree Man and Ralph Krooner, a gentleman from the 50's with the same condition in treatment, over on my blog way back when Tree Man was just hitting the news. You can see the impact Dede's isolation had on the progress of the condition.
http://thehumanmarvels.com/?p=136
I've come across people growing horns, people covered with moss and fungus, people infested with insects and maggots and even people with masses of vegetation removed from their intestine. Hell, I've seen cases of fetus in fetu - where a malformed being has resided in the abdomen or cranium of a sibling for decades.