ST. LOUIS (EGMN) -Nationwide, pancreatic and esophageal cancer procedures are being centralized at high-volume centers, results from a long-term study of discharge data demonstrated.At the same time, however, there has been no significant change in the patterns of care for colon and rectal cancer procedures, Dr. Karyn B. Stitzenberg reported at a symposium sponsored by the Society of Surgical Oncology."Specifically for GI malignancies, there are over 80 studies that support a relevant association...