Our Experts

Colorectal surgeons

Colorectal surgeons are physicians who specialize in diagnosing and treating conditions of the lower digestive tract. They have been trained in general surgery and have gone through advanced training in surgery to treat colon and rectal conditions. Washington University colorectal surgeons at Siteman have special expertise in laparoscopic and robotic surgery. They perform this treatment for the management of cancers and large polyps.

William Chapman Jr., MD, MPHS
Steven Hunt, MD
Matthew Mutch, MD
Kerri Ohman, MD
Matthew Silviera, MD
Paul Wise, MD

Medical oncologists

Medical oncologists are physicians who treat cancer with medicines such as chemotherapy or targeted therapy. They are often the physicians who oversee your treatment plan. They can also help you make decisions about your treatment options.

Olivia Aranha, MD, PhD
Salman Chaudhry, MD
Alfred O. Greco, MD
Patrick Grierson, MD, PhD
Kian-Huat Lim, MD, PhD
Caron Rigden, MD
Rama Suresh, MD
Benjamin Tan, MD

Radiation oncologists

Radiation oncologists are physicians who oversee cancer patients undergoing radiation therapy treatment and manage any complications of the cancer or treatment. They work with other members of the radiation therapy team to develop personalized treatment plans for each patient and to ensure that each treatment is as accurate and precise as possible.

Carl DeSelm, MD, PhD
Hyun Kim, MD
Allen Mo, MD, PhD

Interventional radiologists

Radiologists are physicians who specialize in diagnosing conditions using medical imaging. They use the following types of imaging: X-rays, Computed tomography (CT), Magnetic resonance imaging (MRI), Nuclear medicine, Positron emission tomography (PET), and Ultrasound

J. Daniel Giardina, MD
John Karageorgiou, MD
Christopher Malone, MD