Wikipedia:Articles for deletion/List of extraordinary diseases and conditions
pretty much per nom.  Lists like this ''can not'' have vague terms in the subject, as it disrupts any attempt at a NPOV article.  No matter what sourcing one can find to claim a disease is "extraordinary" one can find a counter source to claim that it isn't.  In essence, nothing can be verified to meet 
— User:Themfromspace, 10:55, 24 May 2009 (UTC)
Stance: delete
Cited policy: WP:V (Wikipedia:Verifiability)