Our colon and rectal surgeons offer the latest medical and surgical treatment of diseases of the colon, rectum and anus. Treatment includes benign and malignant conditions.
Colon and Rectal Surgery: Why Choose Johns Hopkins
- Patients count on our advanced training and commitment to providing the most effective, most efficient and safest treatment options.
- We are among a limited number of institutions in the country to offer one of the latest surgical approaches, the 5x5 protocol, as an aggressive form of rectal cancer treatment.
- We offer additional world-class cancer treatment at our Colorectal Cancer Center, part of the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins.
- Working with other specialists, our team provides consistent and seamless treatment for patients by performing routine screening examinations and surgically treating colon and rectal conditions when necessary.
Conditions We Treat
We specialize in the surgical treatment of colon and rectal diseases, including:
- Colon and rectal cancer
- Colon polyps
- Diverticular disease
- Fecal incontinence
- Hemorrhoids
- Inflammatory bowel disease
Our Advanced Treatment Approaches
Your physician will talk with you about which is the best option for your condition:
- Robotic surgery
- Minimally invasive surgery, including laparoendoscopic surgery
- Transanal endoscopic surgery
- Cytoreductive surgery and heated chemotherapy (HIPEC)
- 5x5 Protocol
5x5 – Latest in Rectal Cancer Treatment
Johns Hopkins colon and rectal cancer surgeons continue to lead the way in medical advancements aimed at colon and rectal cancer therapies.
What is the 5x5 protocol?
The 5x5 protocol administers 5 grays (Gy) of radiation for five days for a total of 25 Gy in combination with full-dose chemotherapy for advanced rectal cancer. As a result, patients receive a more consolidated dose of chemotherapy and radiation therapy prior to surgery. This systemic approach is a break from the more conventional method of delivering radiation over a longer five-week period.
Advantages of the 5x5 protocol:
- A shorter, more aggressive approach to rectal cancer treatment
- Ability to deliver chemotherapy prior to surgery
- More convenient for patients
The future of the 5x5 protocol
Johns Hopkins researchers will soon publish the results from a 5x5 protocol study and the outcomes of 30 to 40 patients who have undergone this procedure, nationally.
Your surgeon will work with you to determine the best treatment plan based on your diagnosis and circumstance.
Meet Our Physicians

Chung, Haniee, M.D.
Vice Director of Global Surgery, Johns Hopkins University School of Medicine

Efron, Jonathan Edward, M.D.
Professor of Urology
The Mark M. Ravitch, M.D. Endowed Professorship in Gastrointestinal Surgery

Fang, Sandy Hwang, M.D.
Director, High Resolution Anoscopy Clinic
Director, Department of Surgery Apprenticeship Program

Meyer, Jeffrey John, M.D., M.S.
Associate Professor of Oncology
Associate Professor of Surgery
Advanced Practitioners
Tam Warczynski, CRNP
Andi Gerard, CRNP
Janelle Glover, CRNP
Marybeth Blom, RN
Nicolle Cowell, RN
Carol Cwik, RN