Bowel Function and Quality of Life After Minimally Invasive Right-Sided Colectomy: What Patients Should Know

Table of Contents

• Key Points
• Background: Why This Research Matters
• Study Design and Methods
• Who Was in the Study?
• Quality of Life Results
• Bowel Function Results
• Medication Use for Bowel Problems
• Risk Factors for Bowel Dysfunction
• How Bowel Function Affects Quality of Life
• Clinical Implications for Patients
• Study Limitations
• Recommendations for Patients
• Frequently Asked Questions
• Source Information

Key Points

• In a study of 57 patients, most bowel symptoms and quality-of-life measures improved significantly over 18 months after minimally invasive right-sided colectomy with D3 lymphadenectomy.
• By 18 months, 96% of responding patients had no bowel dysfunction, and none had major dysfunction, though only 25 patients completed that follow-up.

Background: Why This Research Matters

As the number of people diagnosed with colorectal cancer continues to rise, doctors and researchers are paying more attention to the problems that cancer survivors face after treatment. For patients and surgeons, short-term surgical complications are the immediate concern right after an operation, and long-term cancer outcomes become important later on. But there is another issue that is often overlooked: how surgery changes everyday bodily functions.

Many colorectal cancer patients experience changes in bowel habits, urinary problems, and sexual dysfunction after surgery. These functional issues can significantly reduce quality of life, even when the cancer itself has been successfully treated. Multiple studies have shown that problems are especially severe after rectal resection (removal of the rectum) or left-sided colectomy (removal of the left portion of the colon). A condition called low anterior resection syndrome (LARS) is a common term used to describe bowel habit changes that occur after surgeries on the rectum or lower left colon. Symptoms include urgency, frequent bowel movements, stool fragmentation (passing many small pieces of stool), fecal incontinence (leakage), difficulty emptying the bowel, and increased gas.

LARS is generally thought to be caused by problems with colon movement, reduced function of the new "reservoir" created from remaining bowel, and damage to the anal sphincter or pelvic nerves. These causes may combine in different ways, and the severity of symptoms varies greatly from patient to patient. Bowel problems after right-sided colectomy, by contrast, have traditionally been considered relatively mild and temporary. The right colon and the end of the small intestine (terminal ileum) are mainly responsible for absorbing water from digested food, so some temporary diarrhea is expected after surgery. Over time, the small intestine adapts and absorbs more water, and diarrhea usually improves.

However, a small number of patients experience very severe, persistent bowel symptoms that sometimes don't improve even with medication. Since the concept of complete mesocolic excision (CME) was introduced — a more extensive surgery that removes the colon along with its surrounding tissue and lymph nodes — the range of tissue removed in right-sided colectomy has become broader. This has raised concerns that cutting the superior mesenteric nerve plexus during D3 lymphadenectomy (removal of lymph nodes at the root of the main blood vessels supplying the colon) might increase the risk of bowel dysfunction. This is a particularly important question because D3 lymphadenectomy has been performed routinely in South Korea and Japan for years, while it has only recently become popular in Western countries. Despite these concerns, very few studies have specifically examined bowel dysfunction after right-sided colectomy. This study aimed to fill that gap.

Study Design and Methods

This was a retrospective study (meaning it looked back at data collected during patient care) conducted at Korea University ANAM Hospital in Seoul, South Korea. The researchers enrolled patients who underwent either laparoscopic (minimally invasive, using small incisions and a camera) or robotic-assisted right hemicolectomy (removal of the right colon) or extended right hemicolectomy for colon cancer between October 2017 and September 2018.

Patients diagnosed with adenocarcinoma of the appendix, cecum, ascending colon, hepatic flexure (the bend where the ascending colon meets the transverse colon), or proximal transverse colon were included. Patients of all cancer stages (stage 0 through stage 4) were eligible. Patients who did not complete the questionnaires were excluded. The study was approved by the hospital's Institutional Review Board (IRB No. 2020AN0004), and all participants gave informed consent.

All patients underwent right hemicolectomy or extended right hemicolectomy with D3 lymph node dissection. The surgery removed bowel from the terminal ileum (the last part of the small intestine) to the transverse colon. In both surgical types, the ileocolic and right colic arteries were divided at their origin from the superior mesenteric artery (the main artery supplying the small intestine and right colon). The right branch or the root of the middle colic artery was also divided as needed.

At this hospital, patients are allowed a soft diet on the second day after surgery if no complications are observed. Antidiarrheal or constipation medications were prescribed as needed based on the patient's symptoms. Patients with stage 2 disease with risk factors or stage 3 disease received oxaliplatin-based adjuvant chemotherapy (FOLFOX4 regimen) for 8–12 cycles or 5-fluorouracil with leucovorin (FL regimen) for 6 cycles after surgery.

Patients completed questionnaires about quality of life, bowel symptoms, and urogenital function before surgery and at 3, 6, 12, and 18 months after the operation. Quality of life was assessed using version 3 of the European Organization for Research and Treatment of Cancer (EORTC) Core Quality of Life Questionnaire (QLQ-C30). Bowel function was evaluated for five specific symptoms: gas, stool leakage, frequency of bowel movements, stool fragmentation, and urgency.

Patients were classified into groups based on their total bowel dysfunction score: no bowel dysfunction (0–20 points), minor dysfunction (21–29 points), or major dysfunction (30–42 points). Statistical analysis, performed using SPSS version 20.0, compared follow-up scores to the preoperative baseline using the Wilcoxon signed-rank test. Correlations between quality of life and chemotherapy, medication use, and bowel function were analyzed using linear regression. Risk factors for bowel dysfunction were identified using Cox regression analysis, with P values below 0.05 considered statistically significant. (In plain terms, a P value below 0.05 means there is less than a 5% chance that the finding was due to random chance.)

Who Was in the Study?

A total of 336 patients participated in the overall questionnaire program during the study period. Of these, 57 patients underwent right or extended right hemicolectomy with a minimally invasive approach and were included in this analysis. The response rate varied at each follow-up point: 47 patients answered at 3 months, 52 at 6 months, 52 at 12 months, and 25 at 18 months after surgery.

Here are the key characteristics of the 57 participants:

• Average age: 63.8 years (range 36–80 years)
• Sex distribution: 30 males (52.6%) and 27 females (47.4%)
• Average body mass index (BMI): 23.7 kg/m² (range 18.6–33.9)
• Cancer location: Appendix in 3 patients (5.3%), cecum in 9 (15.8%), ascending colon in 33 (57.9%), hepatic flexure in 7 (12.3%), and transverse colon in 5 (8.8%)
• Surgical approach: Laparoscopy in 56 patients (98.2%) and robotic-assisted surgery in 1 patient (1.8%)
• Procedure type: Right hemicolectomy in 47 patients (82.5%) and extended right hemicolectomy in 10 patients (17.5%)

The average length of bowel removed was 36.3 cm (range 19.0–69.5 cm), including an average colon length of 26.7 cm (range 9.5–56.0 cm) and an average ileum (small intestine) length of 9.9 cm (range 3.2–35.5 cm). Ten patients (17.5%) had preoperative bowel obstruction. Regarding cancer stage, 8 patients (14.0%) had stage 0 disease, 11 (19.3%) had stage 1, 19 (33.3%) had stage 2, 14 (24.6%) had stage 3, and 5 (8.8%) had stage 4 disease. No patients received chemotherapy before surgery, but 18 patients (31.6%) received chemotherapy after surgery.

Quality of Life Results: Steady Improvement Over Time

The study found that most quality-of-life measures improved significantly over the 18-month follow-up period. The global health status/quality of life score rose from 59.5 before surgery to 72.2 at 3 months, 73.4 at 6 months, and 74.0 at both 12 and 18 months (P = 0.001). This means that patients reported feeling better overall after surgery than before it — an important reminder that surgery to remove cancer can actually improve well-being by eliminating the disease and its symptoms.

Individual functional scales showed the following trends:

• Role functioning (ability to perform daily activities and work): improved from 86.8 before surgery to 98.7 at 18 months (P = 0.001)
• Emotional functioning: improved from 81.9 to 99.3 by 18 months (P < 0.001)
• Social functioning: improved from 81.6 to 97.3 (P < 0.001)
• Physical functioning: remained stable, from 87.4 to 88.3 (P = 0.530, not statistically significant)
• Cognitive functioning: remained stable, from 91.2 to 94.0 (P = 0.104, not significant)

Symptom scores — where lower numbers mean fewer symptoms — also improved substantially:

• Fatigue: dropped from 22.4 before surgery to 12.0 at 18 months (P = 0.001)
• Nausea and vomiting: dropped from 8.8 to 0.0 (P = 0.001)
• Pain: dropped from 17.8 to 2.0 (P < 0.001)
• Appetite loss: dropped from 18.7 to 1.3 (P < 0.001)
• Constipation: dropped from 18.1 to 5.3 (P = 0.006)
• Diarrhea: dropped from 15.8 to 5.3 (P = 0.010)
• Financial difficulties: dropped from 21.1 to 9.3 (P < 0.001)

Interestingly, many symptoms showed a temporary worsening at 6 months, then improved at 12 months, and had worsened slightly again by 18 months. The researchers noted a high burden of fatigue and financial difficulties throughout the study period.

Because 18 patients (31.6% of the total) received chemotherapy after surgery, the researchers specifically analyzed whether chemotherapy affected quality of life. At 3 and 6 months after surgery, about 35–40% of patients were receiving chemotherapy (18 patients at each time point, representing 38.3% and 34.6% of respondents, respectively). By 12 months, only 1 patient (1.9%) was still on chemotherapy. Most of the chemotherapy was the FOLFOX regimen (17 patients at both 3 and 6 months), with only 1 patient on the FL regimen. The analysis showed that insomnia (P = 0.005) and the total symptom burden (P = 0.017) were significantly worse among patients receiving chemotherapy. There was no difference in results according to which chemotherapy regimen was used.

Bowel Function Results: Most Symptoms Improve, But Urgency Persists

The study evaluated five specific bowel symptoms using a scoring system where lower scores indicate better function. The results showed that most bowel functions improved significantly over time, but one symptom stood out as an exception.

• Gas: improved from 3.6 before surgery to 0.8 at 18 months (P < 0.001)
• Stool leakage: was very rare throughout the study, from 0.4 to 0.0 (P = 0.025)
• Bowel movement frequency: improved from 1.7 to 0.5 (P = 0.014)
• Stool fragmentation: improved from 2.9 to 1.2 (P = 0.037)
• Urgency: remained high throughout the period — 3.8 before surgery, 2.6 at 3 months, 3.9 at 6 months, 2.4 at 12 months, and 2.0 at 18 months — and the change was not statistically significant (P = 0.217)

The overall bowel dysfunction score improved from 12.4 before surgery to 4.5 at 18 months (P < 0.001), confirming that the total burden of bowel symptoms decreased substantially over time.

When patients were classified into dysfunction groups, the proportion of patients with no bowel dysfunction rose steadily:

• Before surgery: 44 patients (77.2%) had no dysfunction, 5 (8.8%) had minor dysfunction, and 8 (14.0%) had major dysfunction
• At 3 months: 41 (87.2%) no dysfunction, 4 (8.5%) minor, 2 (4.3%) major
• At 6 months: 43 (82.7%) no dysfunction, 4 (7.7%) minor, 5 (9.6%) major
• At 12 months: 47 (90.4%) no dysfunction, 3 (5.8%) minor, 2 (3.8%) major
• At 18 months: 24 (96.0%) no dysfunction, 1 (4.0%) minor, and 0 patients with major dysfunction

This trend was statistically significant (P = 0.014), showing a clear pattern of recovery over time.

The persistence of urgency is an important finding. Urgency — the sudden, pressing need to reach a bathroom — is a symptom that can be highly distressing and disruptive to daily life. The fact that it did not significantly improve even at 18 months suggests that this particular symptom may be a long-term challenge for some patients after right-sided colectomy, even when other bowel functions recover well.

Medication Use for Bowel Problems

The study also tracked how many patients needed medication to manage their bowel function. The percentage of patients using defecation-related medications stayed remarkably constant at around 10% throughout the entire study period:

• Before surgery: 5 patients (8.8%)
• At 3 months: 6 patients (12.8%)
• At 6 months: 6 patients (11.5%)
• At 12 months: 5 patients (9.6%)
• At 18 months: 2 patients (8.0%)

These differences were not statistically significant (P = 0.882), meaning the medication rate stayed essentially flat. The types of medications used included antidiarrheal agents, bulking agents (which add bulk to stool), stool softeners, and other medications. No single medication type showed a significant change in usage over time.

When the researchers analyzed the relationship between medication use and bowel symptoms, they found that patients taking medication had significantly more gas (P = 0.023) and significantly higher bowel movement frequency (P < 0.001). Patients in the bowel dysfunction group (either minor or major) were also significantly more likely to be taking medication (P = 0.028).

This finding highlights an important clinical reality: even though most patients recover well, a small but consistent group — about 1 in 10 — continues to need daily medication for bowel management after right-sided colectomy. The stability of this percentage over time suggests that these patients do not simply "get better on their own" and may require ongoing medical support.

Risk Factors for Bowel Dysfunction

The researchers performed detailed statistical analysis to identify which factors might predict whether a patient would end up in the bowel dysfunction group. At the 6-month time point specifically, univariate analysis (which looks at each factor individually) found that two factors were significantly associated with bowel dysfunction:

• Resected bowel length: each additional centimeter of bowel removed increased the odds of being in the dysfunction group by 9.5% (odds ratio [OR] = 1.095, P = 0.026)
• Resected colon length: each additional centimeter of colon removed increased the odds by 14.7% (OR = 1.147, P = 0.031)

However, when multivariate analysis was performed (which accounts for all factors simultaneously), neither of these remained statistically significant. No other factors — including age, sex, body mass index, cancer location, operation type, ileum length, preoperative obstruction, or disease stage — showed a significant association with bowel dysfunction at any time point.

The researchers also looked at which factors influenced individual bowel symptoms across the whole study period. They found:

• Gas was associated with resected colon length (P = 0.032) and disease stage (P = 0.013)
• Leakage was related to body mass index (P = 0.005) and colon length (P = 0.011)
• Frequency was related to sex (P = 0.002)
• Bowel score (overall dysfunction) was related to disease stage (P = 0.020)

These findings suggest that the amount of colon removed may have a temporary effect on bowel function in the early postoperative period, even though it doesn't predict long-term problems. Patients undergoing more extensive resections — such as extended right hemicolectomy — may experience more bowel symptoms at 6 months but can still expect improvement over time.

How Bowel Function Affects Quality of Life

A key finding of this study was that bowel function has a significant impact on quality of life. The researchers found that most bowel symptoms, with the exception of leakage, adversely affected most functional and symptom scales on the quality-of-life questionnaire.

Specifically, global health status/quality of life was significantly correlated with gas (P = 0.035), bowel movement frequency (P = 0.049), overall bowel score (P = 0.011), and being in the bowel dysfunction group (P = 0.027). Emotional functioning was significantly associated with all bowel symptoms — gas (P = 0.027), leakage (P = 0.002), frequency (P < 0.001), fragmentation (P = 0.003), urgency (P = 0.003), bowel score (P < 0.001), and dysfunction group (P < 0.001). Social functioning was similarly associated with most bowel symptoms.

In plain terms: the worse a patient's bowel symptoms, the lower their emotional well-being and social participation. This makes intuitive sense — dealing with gas, urgency, frequent bathroom trips, or stool fragmentation can make patients anxious about leaving home, socializing, or returning to work. The researchers found that urgency, in particular, adversely affected most functional and symptom scores in the quality-of-life assessment.

Clinical Implications for Patients

This study provides reassuring news for patients facing right-sided colectomy for colon cancer. Despite the concerns that have been raised about D3 lymphadenectomy and complete mesocolic excision causing nerve damage and bowel dysfunction, this study found that most bowel symptoms improved significantly over time and that quality of life returned to normal or better within 12 to 18 months in the majority of patients.

Several specific findings have direct implications for patient care:

1. Most patients recover well. By 18 months, 96% of patients had no bowel dysfunction at all, and none had major dysfunction. The overall bowel dysfunction score dropped from 12.4 before surgery to 4.5 at 18 months.
2. Leakage is rare after right-sided colectomy. The researchers noted that leakage symptoms are much more problematic in patients who undergo rectal surgery or left-sided colectomy, consistent with earlier research by Theodoropoulos and colleagues. Patients having right-sided surgery can generally expect that stool leakage will not be a major issue.
3. Urgency may persist. This is the one symptom that did not significantly improve over time. Urgency stayed at a relatively high level throughout the 18-month follow-up. Patients who experience urgency after surgery should discuss this with their doctors, as it may require ongoing management.
4. About 10% of patients need long-term medication. The percentage of patients using bowel medications stayed steady at about 10% throughout the study, suggesting that a subset of patients will need ongoing pharmacological support.
5. Resection length matters in the short term. Patients who had more bowel removed experienced more bowel dysfunction at 6 months, though this effect disappeared in the longer term.
6. Chemotherapy affects quality of life. Patients receiving chemotherapy — particularly the FOLFOX regimen, which most of these patients received — reported significantly worse insomnia and a higher overall symptom burden. This is important context for patients who may be weighing the side effects of adjuvant chemotherapy against its oncologic benefits.

Study Limitations

It's important to interpret these findings with appropriate caution. This study has several limitations that patients and healthcare providers should keep in mind:

• Small sample size: Only 57 patients were included in the study, and the number of respondents dropped to 25 by the 18-month follow-up. This limits the statistical power of the analysis and makes it harder to detect significant differences.
• Single center: All patients were treated at one hospital (Korea University ANAM Hospital), so the results may not generalize to other institutions or countries.
• Retrospective design: Although data were collected prospectively (forward in time), the study was retrospective in its analysis and lacked a control group of patients who did not undergo surgery or who had a different surgical approach.
• Questionnaire-based outcomes: Bowel function was measured using patient-reported questionnaires rather than objective physiological tests. Patient perception of symptoms can be influenced by many factors.
• No comparison group: The study did not compare right-sided colectomy patients to those who underwent left-sided colectomy or rectal resection in the same institution, though it did reference prior studies for comparison.
• Higher-than-expected baseline dysfunction: A notable 22.8% of patients had bowel dysfunction (minor or major) before surgery. This suggests that some patients already had bowel problems unrelated to their cancer or surgery, which could affect the interpretation of postoperative outcomes.
• Loss to follow-up: The number of patients completing questionnaires dropped from 52 at 12 months to just 25 at 18 months — a 52% drop-off rate. If patients who dropped out were doing worse, the 18-month results could be overly optimistic.

Recommendations for Patients

Based on the findings of this study, here are practical takeaways for patients preparing for or recovering from right-sided colectomy:

1. Expect a gradual recovery. Most bowel symptoms improve over the first year after surgery. Don't be alarmed if bowel habits are irregular in the first few months — this is normal and expected. The study showed that most patients saw meaningful improvement by 6 to 12 months.
2. Be aware that urgency may take longer to resolve. Urgency was the one symptom that persisted throughout the study. If you experience urgency, talk to your doctor about strategies to manage it, including dietary adjustments, pelvic floor exercises, or medications.
3. Know that about 1 in 10 patients needs ongoing medication. If you need antidiarrheal medications or stool softeners after surgery, you are not alone. This study found that approximately 10% of patients continued to need medication for the entire 18-month follow-up period. Don't hesitate to advocate for the medical support you need.
4. If you're having more extensive surgery, plan for a longer adjustment period. The study found that longer resected bowel length was associated with more bowel dysfunction at 6 months, though this resolved over time. If you're having an extended right hemicolectomy, give yourself time to adapt.
5. Monitor emotional and social well-being. The study found strong links between bowel symptoms and emotional/social functioning. If bowel symptoms are affecting your mood or social life, seek support — whether from your surgical team, a gastroenterologist, a dietitian, or a mental health professional.
6. Chemotherapy may temporarily worsen quality of life. If you're receiving adjuvant chemotherapy (such as FOLFOX), be prepared for possible sleep difficulties and a higher overall symptom burden. These effects typically resolve once chemotherapy is completed.
7. Bowels, not just cancer, deserve attention. The study emphasizes that functional outcomes are an important part of cancer survivorship. When meeting with your follow-up care team, actively discuss any bowel symptoms you're experiencing rather than simply accepting them as inevitable.

Frequently Asked Questions

What is a right-sided colectomy with D3 lymphadenectomy?

It is surgery to remove the right portion of the colon along with lymph nodes at the root of the main blood vessels supplying the colon. In a study of 57 patients, this was done using minimally invasive techniques. The removed bowel typically ran from the end of the small intestine to the transverse colon.

How long does it take for bowel function to return to normal after right-sided colectomy?

In a study of 57 patients, most bowel symptoms improved significantly over 18 months, with overall bowel dysfunction scores dropping from 12.4 before surgery to 4.5 at 18 months. By 18 months, 96% of responding patients had no bowel dysfunction. Recovery was gradual, with meaningful improvement often seen by 6 to 12 months.

Will I have urgency after right-sided colectomy?

Urgency — a sudden, compelling need to have a bowel movement — was the one symptom that did not significantly improve in a study of 57 patients followed for 18 months. It remained relatively high throughout. If you experience urgency, discuss management strategies with your doctor, as it may require ongoing support.

Does the length of bowel removed affect bowel function after right-sided colectomy?

In a study of 57 patients, each additional centimeter of bowel removed was linked to a 9.5% higher chance of bowel dysfunction at 6 months, and each additional centimeter of colon removed to a 14.7% higher chance. However, this effect was not significant in longer-term analysis, and most patients improved over time.

What are the limitations of the study on bowel function after right-sided colectomy?

The study included only 57 patients from a single hospital, and by 18 months only 25 responded, so results may not apply to everyone. It was retrospective, used questionnaires, and lacked a comparison group. Also, 22.8% of patients already had bowel dysfunction before surgery, which could affect interpretation.

I have right-sided colon cancer and my surgeon recommends minimally invasive right hemicolectomy with D3 lymphadenectomy — when should I seek a second opinion?

A second opinion is reasonable before surgery, since the extent of lymph node dissection and how much bowel is removed can be weighed against bowel function afterward. More bowel removed was linked to more bowel dysfunction at 6 months, though this resolved over time, and about 10% of patients needed ongoing medication for bowel problems. Urgency often persisted without significant improvement. Reviewing the diagnosis, imaging, and proposed operation with an independent expert can clarify whether the recommended approach fits your situation. Diagnostic Detectives Network provides independent expert second opinions.

Source Information

This patient-friendly article is based on the following peer-reviewed research:

Original Title: Bowel function and quality of life after minimally invasive colectomy with D3 lymphadenectomy for right-sided colon adenocarcinoma

Authors: Ki-Myung Lee, Se-Jin Baek, Jung-Myun Kwak, Jin Kim, Seon-Hahn Kim

Affiliation: Department of Surgery, Korea University College of Medicine, Seoul, South Korea

Journal: World Journal of Gastroenterology, September 7, 2020; 26(33): 4972–4982

DOI: 10.3748/wjg.v26.i33.4972

Study Type: Retrospective study with prospectively collected data

The original article was previously presented as a poster at the 2019 Annual Scientific Meeting of the American Society of Colon & Rectal Surgeons (ASCRS), June 1–5, 2019, in Cleveland, Ohio, United States. This patient-friendly translation is provided for educational purposes and does not constitute medical advice. Patients should consult their own healthcare providers about their individual circumstances.