Evolution of Rectal Cancer Treatment Dr. Jonathan Abelson is well-known to the CRS Education Series as a founding member of the organization. He is an assistant professor of surgery at Lahey Hospital & Medical Center. He completed his residency at Weill Cornell Medical Center in General Surgery followed by a fellowship in Colon and Rectal Surgery at Washington University in St. Louis. He has a special interest in rectal cancer and will be discussing an extremely important topic for all CRS and general surgeons.