WASHINGTON, May 22 -- Stem cells derived from a patient's own fat can cure a perianal fistula, a Spanish researcher said here. Explain to interested patients that perianal fistulas are difficult-to-treat complications seen in Crohn's and other bowel diseases. Note that this study suggests a stem cell approach to healing fistulas that appears to be highly effective. This study was published as an abstract and presented orally at a conference. These data and conclusions should be considered to be preliminary as they have not yet been reviewed and published in a peer-reviewed publication. In a phase II clinical trial, patients...