Colon Surgery (Colectomy)

Colectomy is surgery to remove part or all of the colon, the large intestine. It is recommended when other treatments for colon conditions are ineffective.

OVERVIEW

What is colon surgery (colectomy)?

Colectomy removes the diseased part of the colon. Sometimes the surgeon reconnects the healthy ends, which is called an anastomosis. In other cases, the surgeon creates an ostomy to divert stool to a pouch.

HOW TO CHOOSE

When is colon surgery recommended?

Surgery is considered when benefits outweigh the risks. The reason for surgery guides the timing and plan. Decisions are individualized, focusing on your specific situation and symptoms rather than a set number of attacks.

THE PROCEDURE

What happens during colon surgery?

Each operation is unique. The surgeon uses small incisions or a larger incision based on the plan to remove the diseased colon and decide whether to reconnect the bowel or create an ostomy.

[01]
Preparation and Anesthesia

You are asleep under general anesthesia and monitored by staff throughout the procedure.

[02]
Incision and Access

The surgeon uses small incisions for minimally invasive surgery or a larger incision based on the surgical plan.

[03]
Colon Removal

The diseased colon is identified, isolated, and its blood supply is controlled before the segment is removed.

[04]
Bowel Connection

The surgeon decides whether to reconnect the healthy ends of the bowel or create an ostomy based on tissue quality and safety.

[05]
Closure and Recovery

Incisions are closed and you are moved to the recovery room for monitoring.

PRE-OPERATIVE WORKUP

Preparing for Colon Surgery

Preparation involves reviewing imaging like CT scans to show inflammation or blockages, along with blood work and colonoscopy results to personalize the surgical plan.

Required before surgery

• CT scan of the abdomen and pelvis to show disease extent.

• Review of colonoscopy results and medical history.

• Bowel preparation for planned surgeries.

Sometimes also ordered

• Blood work and pathology reports.

• Review of prior operation records.

WHO IS A CANDIDATE

Who is a candidate for colon surgery?

Candidates have a clear reason for surgery and can tolerate anesthesia. Decisions consider diagnosis, imaging, symptoms, overall health, and personal goals.

Likely good candidates

• Patients with colon cancer or high-risk polyps.

• Individuals with complicated or recurrent diverticulitis.

• Those with large bowel obstruction or severe bleeding.

• Patients with severe inflammatory bowel disease or fistulas.

May need further evaluation

• Patients unable to tolerate general anesthesia.

• Individuals with severe medical risks that outweigh surgical benefits.

Not sure if you qualify?

Dr. Dunn reviews every case personally. Book a consultation and he'll give you an honest answer — even if that answer is "let's get more testing first."

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RISKS

Risks to be aware of

Colon surgery is a major procedure even when performed using minimally invasive techniques. Risks vary by person and are influenced by factors like overall health and the urgency of the surgery.

Common short-term side effects (expected and temporary)

Expected in recovery

• Temporary slowed bowel function after surgery.

• Possible conversion from minimally invasive to open surgery.

Serious risks (uncommon)

• Anastomotic leak at the bowel connection.

• Infection or bleeding during or after surgery.

• Injury to nearby organs like the bladder.

• Blood clots in the legs or lungs.

RECOVERY

What recovery looks like

Recovery involves a hospital stay, gradual return to normal diet, and follow-up care to ensure the bowel is functioning correctly.

[D1]
Day of surgery

You will receive general anesthesia, undergo the planned procedure, and then move to the recovery room for monitoring.

[D4]
First 4 days

You will likely stay in the hospital, focusing on pain control, early walking to lower clot risks, and gradual diet advancement.

[W1]
Through about 1.5 weeks

At-home recovery begins with wound care and managing temporary changes in bowel habits like urgency or gas.

[W2]
Around 2 weeks

Follow-up visits are typically scheduled to review pathology results, monitor wound healing, and discuss activity limits.

[M2]
Month 2 onwards

Many people feel better by six weeks, but recovery varies based on the specific operation.

OUTCOMES

What to expect long-term

The goal is safe disease treatment and long-term protection of bowel function. While bowel habits may change temporarily, most patients return to normal activities within several weeks.

FAQ

Questions about colon surgery (colectomy)

When is colon surgery recommended?

Colon surgery, or a colectomy, is typically considered when other treatments are no longer effective or safe. Your doctor might recommend this procedure for several reasons, including complicated diverticulitis, colon cancer, or a severe bowel blockage. Other common reasons include ongoing bleeding, narrowing of the colon called a stricture, or an abnormal connection known as a fistula. The decision to have surgery is highly personal and depends on your specific symptoms and medical history. During a consultation, your surgeon will review your situation to see if the benefits of removing the diseased part of your colon outweigh the risks. This evaluation helps ensure that surgery is the right step for your long-term health and daily comfort.

What tests are needed before colon surgery?

Before planning your colon surgery, several important tests are needed to create a safe and effective surgical plan. A CT scan of the abdomen and pelvis is often an important tool. This imaging helps your surgeon see the exact location of the disease and check for issues like inflammation, blockages, or pockets of infection called abscesses. In addition to imaging, your doctor will likely review your recent colonoscopy results, blood work, and any past pathology reports. These tests provide a clear picture of your overall health and the condition of your colon. Having all this information ready allows your surgical team to personalize your care and decide on the best approach for your specific needs.

What happens during a colectomy procedure?

During a colectomy, you will be asleep under general anesthesia while the surgical team monitors you closely. The surgeon typically uses small incisions for a minimally invasive approach, though a larger incision may be necessary in some cases. Once the diseased segment of the colon is identified, the surgeon carefully removes it and manages the surrounding blood supply. A key part of the procedure is deciding whether to reconnect the healthy ends of the bowel, which is called an anastomosis. If a safe connection cannot be made due to infection or poor tissue quality, the surgeon may create an ostomy to divert stool into a pouch. Every step is focused on treating the disease effectively while protecting your long-term bowel function.

What can I expect during recovery after colon surgery?

Recovery after colon surgery is a gradual process that begins with a hospital stay of several days. During this time, your team will focus on managing your pain and helping you start walking early to prevent complications. You will gradually advance your diet as your bowel function returns. It is normal to experience temporary changes in your bowel habits, such as urgency or gas, as your body adjusts. Once you return home, full recovery often takes several weeks, with most people feeling better by the six-week mark. You will have follow-up visits to check your healing and discuss any activity limits. Following your discharge instructions closely is the best way to support a smooth and safe recovery.

Ready to stop managing and start fixing?

Most practices hand you discharge papers and wish you luck. We keep working with you, at no extra cost, until all three happen: off your reflux meds, sleeping flat without pillows, and eating your favorite foods again — typically within 30 days of surgery. That's our GERD surgery guarantee.

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