Dr. Billy Y. Lan

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 Genital Warts. His top areas of expertise are Colorectal Cancer, Genital Warts, Familial Colorectal Cancer, Colostomy, and Ileostomy.

I specialize in the surgical management of benign and malignant diseases of the gastrointestinal tract (GI) tract. Specifically trained in laparoscopic resection of inflammatory bowel disease and colorectal cancer, I perform the full range of colorectal operations, including reconstructive operations, such as ileal pouches. My clinical, research, and administrative efforts are all focused on implementing perioperative care practices that ensure best patient outcomes. Bridging specialties to best care for GI surgery patients, I particularly enjoy combined cases. For instance, I regularly operate with the pediatric surgery team on younger patients with IBD or pelvic cancer. Until my exposure to surgery in medical school, I thought I wanted the patient-doctor relationship well-known to primary care. With experience, however, I realized this relationship was possible in the practice of surgery. Colorectal surgery allows me the privilege of long-term relationships with a great variety of patients; close relationships with my colleagues; and administrative positions that promote the best care. Dr. Marosky is rated as a Distinguished provider by MediFind in the treatment of Genital Warts. Her top areas of expertise are Colorectal Cancer, Familial Colorectal Cancer, Crohn's Disease, Hernia Surgery, and Hemorrhoidectomy.

My special interests include colon and rectal cancer, surgical treatment of inflammatory bowel and diverticular diseases, minimally invasive surgical techniques, including advanced laparoscopic and robotic surgery, and treatment of diseases and disorders of the anal canal. My passion is to provide specialized and individualized care to each one of my patients. I am part of a large, close family and enjoy spending time with them. My hobbies include gardening, cooking/baking, and spending as much time as possible outdoors. I grew up in Davidson County, North Carolina. Dr. Thomas is rated as an Advanced provider by MediFind in the treatment of Genital Warts. Her top areas of expertise are Familial Colorectal Cancer, Anal Cancer, Genital Warts, Gastroesophageal Junction Cancer, and Small Bowel Resection.