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Reworked article according to surgical sieve
Also removed some of the rarer disorders mentioned. Most sources had to go since they did not meet WP:MEDRS. WHat I have put in is mostly unsourced, so you could argue that things are now worse, but whatever.
Also couldn't thing of any metabolic or degenerative disorders that affect the tongue... mental block. Lesion (talk) 12:36, 23 July 2013 (UTC)