Patients who are diagnosed with Crohn's disease today can be tested for the activity of a particular gene that can help guide their treatment. The role this gene plays was a fortuitous discovery in the laboratory of Upstate scientist William Kerr, PhD, a professor of pediatrics and microbiology and immunology at Upstate. He talks about what may cause Crohn's disease -- a chronic inflammatory bowel disorder -- and how it's treated. (Click here to see the research paper on Crohn's disease that Kerr speaks about.)