Dr. David W. Ollila

George Chang is a General Surgeon in Cary, North Carolina. Dr. Chang is rated as a Distinguished provider by MediFind in the treatment of Anal Cancer. His top areas of expertise are Colorectal Cancer, Anal Cancer, Familial Colorectal Cancer, Colostomy, and Hepato-Pancreato-Biliary Surgery.

I am a colorectal surgeon and researcher who has been at Duke for about 25 years. I see patients who have issues with the small bowel, colon, rectum and anus. These issues include benign tumors, cancers, hemorrhoids and fistulas. The best part of my job is operating. The operating room is a special place, where we have been able to put a number of processes in place so things run smoothly and we can give patients the best chance at a good outcome. The fact that you can take a condition, operate and potentially cure a patient is fascinating to me. As a faculty member, I also enjoy when I have the chance to teach residents during the operation. When I am not at work, I enjoy fishing, hiking and playing tennis with my children. Dr. Mantyh is rated as a Distinguished provider by MediFind in the treatment of Anal Cancer. His top areas of expertise are Colorectal Cancer, Genital Warts, Familial Colorectal Cancer, Colostomy, and Ileostomy.

Karen Stitzenberg is a General Surgeon and a Surgical Oncologist in Hillsborough, North Carolina. Dr. Stitzenberg is rated as an Advanced provider by MediFind in the treatment of Anal Cancer. Her top areas of expertise are Familial Colorectal Cancer, Colorectal Cancer, Melanoma, Bladder Reconstruction, and Hernia Surgery. Dr. Stitzenberg is currently accepting new patients.