Sphincter-Preserving Surgery for Rectal Cancer Patients

For those with a rectal cancer diagnosis, the fear of living with a permanent colostomy bag feels deeply personal because it touches nearly every part of daily life, from body image and intimacy to work, travel, and simple routines that once felt automatic. What many patients do not realize is that advances in rectal cancer surgery have dramatically improved the ability to avoid a permanent stoma. 

Now, sphincter-preserving procedures are designed to remove the cancer while protecting the muscles needed for normal bowel function, allowing many patients to continue using the bathroom naturally after recovery. While this type of surgery is very successful, the success is often tied directly to the expertise of the surgeon. 

Continue reading to learn how sphincter-preserving surgery works, what recovery can look like, and where to find the best sphincter-sparing rectal cancer surgeon in Los Angeles. 

What is Sphincter-Preserving Surgery for Rectal Cancer?

Sphincter-preserving surgery is the modern alternative to abdominoperineal resection, or APR, the older operation that removes the rectum, the anus, and the sphincter muscles altogether and leaves the patient with a permanent colostomy. The goal of a sphincter-preserving operation is the same as APR when it comes to cancer control, which is to remove the tumor with clean margins. The difference is what stays behind. By preserving the anal sphincter muscles and reconnecting the colon to whatever portion of the rectum or anal canal remains, bowel movements can still happen the way they always have.

How Does Sphincter-Preserving Surgery Work?

For decades, surgeons removed the rectum from the top down, working through an incision in the abdomen and reaching deeper into the pelvis with each step. That approach works well for tumors high in the rectum, but the lower the tumor sits, the harder the view becomes. The pelvis narrows, the bladder and other organs crowd the space, and the angle of the instruments works against the surgeon. Transanal total mesorectal excision, or taTME, is a sphincter-preserving technique that is designed to solve that problem by flipping the approach. 

The patients who benefit most from taTME tend to be: 

• Those with narrow pelvises
• Patients with a higher body mass index
• Anyone with a tumor sitting in the bottom third of the rectum

With this approach, the best colorectal surgeon in Los Angeles can see the lower edge of the tumor directly instead of working blind from above, which helps protect the rim of healthy tissue around the cancer that determines whether the operation is curative.

Can I Really Avoid a Permanent Colostomy?

With sphincter-preserving surgery, the honest answer is yes for most patients. But the path depends on three things: 

• Anatomy: Where exactly is the tumor sitting in the rectum, how large is it, and has it pushed into the sphincter muscles? Imaging answers most of those questions before surgery is even planned. 
• Neoadjuvant treatment: This means the chemotherapy and radiation given before surgery. These treatments can shrink a tumor away from the sphincter, sometimes dramatically, which often turns a borderline case into a clear candidate for preservation. 
• Surgical expertise: This is the variable patients have the most control over.

Many sphincter-preserving operations include a temporary stoma. After the rectum is removed and the colon is reconnected to the anal canal, the surgeon often creates a loop ileostomy that diverts stool away from the new connection while it heals. This is not a permanent colostomy. It usually stays in place for two to four months, and then a smaller second operation reverses it. Patients sometimes hear the word stoma and assume the worst, so it helps to clarify with the surgical team whether the plan involves a temporary diversion or a permanent one.

Questions Every Rectal Cancer Patient Should Ask Before Surgery

The right consultation is a conversation, not a sales pitch, and the questions a patient brings shape how that conversation goes: 

• Am I a candidate for a sphincter-preserving procedure? 
• Which technique would you recommend for me, and why that approach over the alternatives? 
• Could neoadjuvant chemotherapy or radiation improve my chances of keeping my sphincter? 
• Is my tumor close enough to the anal canal that an ISR or taTME might be needed instead of a standard low anterior resection? 

Finding the Best Colorectal Surgeon in Los Angeles for Sphincter-Preserving Surgery

Decisions about rectal cancer surgery are not only about removing cancer. They are also about preserving the routines, independence, and quality of life that patients want to hold onto after treatment. Advances in sphincter-preserving surgery have changed what is possible for many people, but these procedures demand careful planning, technical precision, and experience with complex pelvic surgery. This is why Dr. Karen Zaghiyan is dedicated to helping patients navigate those decisions with a clear understanding of their options and the realities of recovery. 

Dr. Zaghiyan performs advanced sphincter-preserving techniques for rectal cancer, including approaches designed for tumors once thought too low to avoid a permanent colostomy. By combining thoughtful surgical strategy with modern minimally invasive techniques, our goal is always the same: complete cancer removal while preserving as much normal function as possible. 

Ready to see the best sphincter-sparing rectal cancer surgeon in Los Angeles for the expertise and precision you need to make a complete recovery from rectal cancer?