About this unit 4G is a 22-bed surgical unit specializing in the care of patients undergoing colorectal surgery as part of treatment for conditions such as colorectal cancer, diverticulitis, bowel obstructions, bowel perforations, Crohn's disease, colitis, and volvulus. People are drawn to 4G for its strong teamwork, supportive culture, expert surgical nursing practice, and close collaboration with a multidisciplinary care team.