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Hemicolectomy – Procedure, Risks & Recovery

A hemicolectomy is a surgical procedure in which part of the large intestine is removed. It is commonly performed to treat colorectal cancer, severe inflammation, or other colon conditions.

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Things worth knowing about "Hemicolectomy"

A hemicolectomy is a surgical procedure in which part of the large intestine is removed. It is commonly performed to treat colorectal cancer, severe inflammation, or other colon conditions.

What is a Hemicolectomy?

A hemicolectomy is a surgical procedure in which a portion of the large intestine (colon) is removed. The term derives from the Greek word hemi (meaning half) combined with colectomy (surgical removal of the colon). Depending on which section is affected, the procedure is classified as a right hemicolectomy (removal of the right side of the colon) or a left hemicolectomy (removal of the left side). After the diseased segment is removed, the remaining ends of the bowel are reconnected in a procedure called an anastomosis.

Indications – When is a Hemicolectomy Performed?

A hemicolectomy is indicated for several conditions affecting the large intestine. The most common reasons include:

Colorectal cancer: Malignant tumors of the colon represent the most frequent indication for this procedure.
Crohn disease: A chronic inflammatory bowel disease that may require surgical intervention in severe cases.
Diverticular disease: Inflamed or perforated pouches in the colon wall (diverticula) that cannot be managed conservatively.
Colon polyps: Large polyps or those that cannot be removed endoscopically and carry a risk of malignant transformation.
Bowel obstruction (ileus): Life-threatening blockages of the intestine requiring immediate surgery.
Intestinal ischemia: Reduced blood flow to the colon leading to tissue damage or necrosis.

Procedure Overview

Preoperative Preparation

Before surgery, the patient undergoes thorough evaluation including imaging studies such as computed tomography (CT) or colonoscopy, along with blood tests. Bowel preparation is generally performed prior to the operation. The procedure is carried out under general anesthesia.

Surgical Approaches

A hemicolectomy can be performed using two main techniques:

Open surgery (laparotomy): The abdomen is accessed through a large incision. This approach is used for complex cases or emergency operations.
Minimally invasive surgery (laparoscopy): A camera and surgical instruments are inserted through several small incisions. This approach is associated with less postoperative pain and a faster recovery.

Anastomosis

Once the diseased bowel segment has been removed, the two remaining ends are sutured or stapled together to restore bowel continuity — a process known as an anastomosis. In certain situations, such as emergency procedures or significant inflammation, a temporary stoma (artificial bowel opening) may be created, which can be reversed at a later stage once healing is complete.

Risks and Possible Complications

As with any major surgical procedure, a hemicolectomy carries certain risks, including:

Anastomotic leak: A failure of the bowel connection to heal properly, allowing bowel contents to leak — one of the most serious complications.
Infection: Wound infections or peritonitis (inflammation of the abdominal lining).
Bleeding: Postoperative hemorrhage in the surgical area.
Bowel obstruction: Adhesions (internal scar tissue) forming after surgery may block the intestine.
Injury to adjacent structures: Such as the ureter, bladder, or blood vessels.
Thrombosis and pulmonary embolism: Blood clots that can develop in the veins and become life-threatening.

Recovery and Postoperative Care

Following surgery, patients typically remain hospitalized for several days to one week. Nutrition is reintroduced gradually — starting with liquids before advancing to solid foods. Physiotherapy and early mobilization are encouraged to reduce the risk of complications. Full recovery after open surgery may take several weeks, while laparoscopic patients often recover more quickly. For patients treated for cancer, oncological follow-up care with regular check-ups is an essential part of the treatment plan.

Long-Term Outcomes and Quality of Life

The majority of patients can lead a largely normal life after a hemicolectomy. Since only a portion of the colon is removed, digestive function is generally preserved. Some patients experience changes in bowel habits — such as more frequent or looser stools — in the initial period following surgery, but these typically normalize over time. A balanced, fiber-rich diet supports the adaptation of the remaining bowel.

References

National Comprehensive Cancer Network (NCCN): Clinical Practice Guidelines in Oncology – Colon Cancer, Version 2.2024. Available at: https://www.nccn.org
Townsend, C.M. et al.: Sabiston Textbook of Surgery. 21st edition. Philadelphia: Elsevier, 2022.
Lohsiriwat, V.: Enhanced recovery after surgery vs conventional care in emergency colorectal surgery. World Journal of Gastroenterology (2014); 20(38): 13950–13955. DOI: 10.3748/wjg.v20.i38.13950

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