Oral Cancer Might Be Detected In Saliva Test For CD44

Researchers at Univeristy of Miami have found that patients with oral cancer carry a protein called CD44. They have found a method to find its prescence in saliva. At this point more study is of course necessary.
http://cebp.aacrjournals.org/content/14/3/735.abstract
and
http://www.journals.elsevierhealth.com/periodicals/ymhn/article/PIIS0194599801078731/abstract