The long-term results of a randomized clinical trial of laparoscopy-assisted versus open surgery for colon cancer. Ann Surg. 2008;248:1-7. [PMID: 18580199 DOI: 10.1097/sla.0b013e31816a9d65]

Laparoscopic versus open surgery for colon cancer: a meta-analysis of 5-year follow-up outcomes

BACKGROUND

Colon cancer is one of the most common malignant tumors of digestive tract with a rather high incidence rate. Currently, surgery is the only radical therapy for colon cancer, while Laparoscopic colectomy (LAC) has become another focus since studies reported LAC could improve the short-time outcomes and quick recovery of patients compared with open colectomy (OC). However, it's still unclear whether LAC can better improve patients' long-time survival than OC.

OBJECTIVE

We aimed to perform a meta-analysis to answer whether the 5-year recurrence and survival rate after LAC are comparable to those reported after OC in patient with colon cancer.

METHODS

We searched Cochrane Library, PubMed, Embase, CBM, VIP, and CNKI for relevant studies. The time searched was from the establishment time of the databases to September 15, 2011. At the same time, we searched Google, Medical Martix and Baidu for more studies as well as a hand-search. We limited the language to English and Chinese. Two reviewers independently screened articles to identify randomized controlled trials (RCTs) according to the inclusion and exclusion criteria and assessed the methodological quality of included trials, and then extracted data. Meta-analysis was performed using RevMan5.0.

RESULTS

Five RCTs involving 2695 patients reported long-term outcomes based on 5-year data and were included in the analysis. No significant differences between LAC and OC were found in the overall mortality (RR = 0.94; 95% CI (0.82, 1.09); P = 0.23, I(2) = 21%), total recurrence rate (RR = 0.94; 95% CI (0.81, 1.10); P = 0.24, I(2) = 27%), 5-year tumor free survival rate (RR = 1.00, 95% CI (0.94, 1.06); P = 0.96, I(2) = 0%). and overall 5-year survival (RR = 1.02; 95% CI (0.97, 1.07); P = 0.55, I(2) = 0%).

CONCLUSIONS

This meta-analysis suggests that LAC was as effective and safe as OC for colon cancer.

Surgery, wound healing, and metastasis: recent insights and clinical implications

BACKGROUND

Surgery-induced acceleration of tumour growth has been observed since several centuries.

METHODS

We reviewed recent insights from in vitro data, animal experimentation, and clinical studies on how surgery-induced wound healing or resection of a primary cancer influences the tumour-host ecosystem in patients harbouring minimal residual or metastatic disease.

RESULTS

Most of the growth factors, chemokines, and cytokines orchestrating surgical wound healing promote tumour growth, invasion, or angiogenesis. In addition, resection of a primary tumour may accelerate synchronous metastatic growth. In the clinical setting, indirect evidence supports the relevance of the above findings. Randomized clinical trials are underway comparing resection versus observation in metastatic breast and colon cancer with asymptomatic primary tumours.

CONCLUSIONS

In depth knowledge of how surgical intervention alters the tumour-host-metastasis communicating ecosystems could have important implications for clinical decision making in patients with synchronous metastatic disease and for the design and timing of multimodality treatment strategies.

Comparison of NCCN, NICE and Chinese Ministry of Health guidelines for diagnosis and treatment of colorectal cancer

Colorectal cancer (CRC) is one of the most common gastrointestinal malignancies in China. With the increasing in the incidence of CRC in recent years, standardization of the diagnosis and treatment of CRC has attracted more and more attention from clinicians. Over the past years, although clinicians in China mainly refer to the NCCN guideline, the NICE guideline also attracts wide attention. In addition, the Chinese Ministry of Health guideline for the diagnosis and treatment of CRC was issued on October, 2010. In this paper, we will compare and interpret the above three guidelines.

Potential value of sonazoid-enhanced intraoperative laparoscopic ultrasonography for liver assessment during laparoscopy-assisted colectomy

Purpose

Laparoscopy-assisted colectomy (LAC) has gained acceptance for the treatment of colorectal cancer. However, conventional palpation of the liver and adequate observation of the abdominal cavity are not achievable during LAC. The aim of this study was to assess the clinical value of using Sonazoid (contrast enhanced)-intraoperative laparoscopic ultrasonography (S-IOLUS) in patients with primary colorectal cancer.

Methods

From May 2005 to August 2008, 454 patients underwent 339 LACs and 115 open colectomies for colorectal cancer. One hundred forty-eight patients with clinical stage II or III colorectal cancer, as determined by preoperative imaging, who were undergoing LACs were prospectively enrolled.

Results

Although IOLUS did not detect any lesions, small hypoechoic lesions were detected by the S-IOLUS (n = 71) in the Kupffer-phase view of two patients (2.8 %). None of the 71 patients who underwent S-IOLUS showed liver metastases within 6 months after LAC. In the conventional IOLUS group (n = 77), metastatic lesions were identified in two patients (2.6 %). The new liver metastases in these two patients were detected within 6 months after LAC.

Conclusions

S-IOLUS of the liver during colorectal cancer surgery is useful for staging and as a diagnostic modality. It can identify lesions that are undetectable by preoperative imaging, and may be considered for routine use during LAC.

Human tissue-engineered colon forms from postnatal progenitor cells: an in vivo murine model

AIM

Loss of colon reservoir function after colectomy can adversely affect patient outcomes. In previous work, human fetal intestinal cells developed epithelium without mesenchyme following implantation in mice. However, for humans, postnatal tissue would be the preferred donor source. We generated tissue-engineered colon (TEC) from postnatal human organoid units.

MATERIALS & METHODS

Organoid units were prepared from human colon waste specimens, loaded onto biodegradable scaffolds and implanted into immunocompromised mice. After 4 weeks, human TEC was harvested. Immunofluorescence staining confirmed human origin, identified differentiated epithelial cell types and verified the presence of supporting mesenchyme.

RESULTS

Human TEC demonstrated a simple columnar epithelium. Immunofluorescence staining demonstrated human origin and the three differentiated cell types of mature colon epithelium. Key mesenchymal components (smooth muscle, intestinal subepithelial myofibroblasts and ganglion cells) were seen.

CONCLUSION

Colon can form from human progenitor cells on a scaffold in a mouse host. This proof-of-concept experiment is an important step in transitioning TEC to human therapy.

Investigation of free cancer cells in peripheral blood using CEA mRNA expression in perioperative colorectal cancer patients

The aim of this study was to evaluate the impact of laparoscopic surgery (Lap) on circulating free tumor cells in colorectal cancer patients. In this study, we selected carcinoembryonic antigen (CEA) mRNA expression in peripheral blood as the marker of the circulating tumor cells and compared this marker between Lap and open colectomy (OC), to investigate differences due to surgical approach. A total of 50 patients underwent curative surgery for solitary colorectal cancer at our department, between June, 2008 and February, 2011. The patients were divided into OC and Lap groups (25 patients each). Total RNA was extracted subsequent to peripheral blood collection prior to surgery, immediately following surgery and 1, 3 and 7 days after surgery. CEA mRNA was detected with reverse transcription polymerase chain reaction (RT-PCR) and the association between peripheral blood CEA mRNA-positive rate, surgical findings and clinicopathological characteristics was investigated. The peripheral blood CEA mRNA-positive rate was significantly increased immediately after surgery, compared to the preoperative rate (P=0.001), but decreased over time. No significant differences were observed at any blood-sampling time point after postoperative day 1. The positive rate was significantly increased in the OC group immediately after surgery, compared to the preoperative rate (P=0.004). However, there were no significant differences between the rates prior to and immediately after surgery in the Lap group. The patients were then divided into those who were peripheral blood CEA mRNA-positive and -negative after surgery (postoperative positive and negative groups, respectively) and the clinicopathological characteristics were compared. Significant differences were identified between the groups in lower rectal cancer patients and patients with a large intraoperative blood loss (P=0.001 and P=0.01, respectively). In conclusion, in colorectal cancer patients, there were no significant differences in the perioperative peripheral blood CEA mRNA-positive rate or its short-term changes between patients undergoing OC and Lap surgery. It was suggested that Lap is equivalent to OC with regard to free cancer cells.

Perioperative blood transfusion in cancer patients undergoing laparoscopic colorectal resection: risk factors and impact on survival

BACKGROUND

Perioperative blood transfusion has been associated with a poor prognosis in patients undergoing surgery for colorectal cancer. The aim of this study was to evaluate risk factors for blood transfusion and its impact on long-term outcome exclusively in patients undergoing laparoscopic surgery for curable colorectal cancer.

METHODS

Data were retrieved from a prospectively collected database of patients who underwent laparoscopic surgery for curable colorectal cancer over a 6-year period. Long-term data were collected from our outpatient clinic and personal contact when necessary.

RESULTS

Two hundred and one patients underwent laparoscopic surgery for curable colorectal cancer (stage I-III). Sixty-eight (33.8 %) received blood transfusions during or after surgery. These patients were typically older, had lower preoperative hemoglobin levels, had a more advanced cancer, had a higher Charlson score, had a higher rate of complications and had a higher conversion rate. Kaplan-Meier overall survival analysis was significantly worse in patients who received blood transfusions (P = 0.004). Decreased disease-free survival was also observed in transfused patients; however, this did not reach statistical significance (P = 0.21). A multivariate analysis revealed that transfusion was not an independent risk factor for decreased overall and disease-free survival. The Charlson score was the only independent risk factor for overall survival (OR = 2.1, P = 0.002). Independent factors affecting disease-free survival were stage of disease, Charlson score and, to a lesser degree, age and body mass index.

CONCLUSIONS

Perioperative blood transfusion is associated with decreased long-term survival in patients undergoing laparoscopic resection for colorectal cancer. However, this association apparently reflects the poorer medical condition of patients requiring surgery and not a causative relationship.

Robot-assisted right colectomy with lymphadenectomy and intracorporeal anastomosis for colon cancer: technical considerations

BACKGROUND

A surgical robot (the da Vinci system) was developed to overcome the disadvantages of laparoscopic surgery, and applications of this system have been widely used. In this study, we present our standardized technique of robotic right colectomy with lymphadenectomy and intracorporeal anastomosis, with an assessment of feasibility in a series of 15 patients.

METHODS

All robotic right colectomies with lymphadenectomy were performed by a single surgeon between April 2009 and March 2010. Robotic assistance was used for the colonic mobilization, lymphadenectomy, and bowel reconstruction. Patient demographics, perioperative clinical outcomes, and pathologic results were reviewed.

RESULTS

Robotic-assisted right colectomy was successfully performed on 15 patients with colon cancer. The total operative time was 201.4 ± 8.1 minutes, with a mean robotic time of 114.4 ± 7.5 minutes. No patient required conversion to conventional surgery. The median time to clear liquid intake was 3 days, and the median length of stay after surgery was 8 days. The mean tumor diameter was 3.0 ± 0.3 cm, and the mean number of harvested lymph nodes was 24.2 ± 15.5. Tumors were diagnosed as stage I in 7 patients, stage II in 5, and stage III in 3.

CONCLUSIONS

Robotic right colectomy with lymphadenectomy can be performed successfully and safely. The robotic system was safe and feasible for the following steps: accurate node dissection, suturing for intracorporeal anastomosis, and natural orifice specimen extraction. Further comparative studies must be performed to verify the advantages of robotic surgery over conventional laparoscopic surgery.

Long-term outcomes comparing surgery to embolization-ablation for treatment of solitary HCC<7 cm

BACKGROUND

Resection has been the standard of care for patients with solitary hepatocellular carcinoma (HCC). Transarterial embolization and percutaneous ablation are alternative therapies often reserved for suboptimal surgical candidates. Here we compare long-term outcomes of patients with solitary HCC treated with resection versus combined embo-ablation.

METHODS

We previously reported a retrospective comparison of resection and embo-ablation in 73 patients with solitary HCC<7 cm after a median follow-up of 23 months. This study represents long-term updated follow-up over a median of 134 months.

RESULTS

There was no difference in survival among Okuda I patients who underwent resection versus embo-ablation (66 vs 58 months, p=.39). There was no difference between the groups in the rate of distant intrahepatic (p=.35) or metastatic progression (p=.48). Surgical patients experienced more complications (p=.004), longer hospitalizations (p<.001), and were more likely to require hospital readmission within 30 days of discharge (p=.03).

CONCLUSION

Over a median follow up of more than 10 years, we found no significant difference in overall survival of Okuda 1 patients with solitary HCC<7 cm who underwent surgical resection versus embo-ablation. Our data suggest that there may be a greater role for primary embo-ablation in the treatment of potentially resectable solitary HCC.

Single incision vs conventional laparoscopic anterior resection for sigmoid colon cancer: a case-matched study

BACKGROUND

The purpose of the study was to evaluate the safety and effects of single-incision laparoscopic anterior resection (SILAR) for sigmoid colon cancer by comparing it with conventional laparoscopic anterior resection (CLAR).

METHODS

Twenty-four patients who underwent SILAR between April 2010 and July 2011 were case matched 1:2 with patients who underwent CLAR, with respect to age, sex, body mass index, tumor location, and history of abdominal surgery.

RESULTS

Two patients in the SILAR group and 1 patient in the CLAR group experienced anastomotic leakage. The operative time was longer in the SILAR group than in the CLAR group (251 ± 50 vs 237 ± 49 minutes; P = .253). The number of harvested lymph nodes (19.6 ± 10.7 vs 20.8 ± 7.7; P = .630) was not different. The postoperative hospital stay was shorter in the SILAR group (7.1 ± 3.4 days) than in the CLAR group (8.1 ± 3.5 days) (P = .234).

CONCLUSIONS

On the basis of the early outcomes, we conclude that SILAR is feasible and safe. Moreover, the adequate lymph node harvest and free margins support the use of this procedure.

Outcomes and costs associated with robotic colectomy in the minimally invasive era

BACKGROUND

Robotic-assisted surgery has become increasingly common; however, it is unclear if its use for colectomy improves in-hospital outcomes compared with the laparoscopic approach.

OBJECTIVE

The aim of the study is to compare in-hospital outcomes and costs between patients undergoing robotic or laparoscopic colectomy.

DESIGN

This study is a retrospective review of the 2008 to 2009 Nationwide Inpatient Sample. SETTINGS, PATIENTS, INTERVENTIONS: All adult patients who underwent an elective robotic or laparoscopic colectomy in hospitals performing both procedures (N = 2583 representing an estimated 12,732 procedures) were included.

MAIN OUTCOME MEASURES

Outcomes included intraoperative and postoperative complications, length of stay, and direct costs of care. Regression models were used to compare these outcomes between procedural approaches while controlling for baseline differences in patient characteristics.

RESULTS

Overall, 6.1% of patients underwent a robotic procedure. Factors associated with robotic-assisted colectomy included younger age, benign diagnoses, and treatment at a lower-volume center. Patients undergoing robotic and laparoscopic procedures experienced similar rates of intraoperative (3.0% vs 3.3%; adjusted OR = 0.88 (0.35-2.22)) and postoperative (21.7% vs 21.6%; adjusted OR = 0.84 (0.54-1.30)) complications, as well as risk-adjusted average lengths of stay (5.4 vs 5.5 days, p = 0.66). However, robotic-assisted colectomy resulted in significantly higher costs of care ($19,231 vs $15,807, p < 0.001). Although the overall postoperative morbidity rate was similar between groups, the individual complications experienced by each group were different.

LIMITATIONS

A limitation of this study is the potential miscoding of robotic cases in administrative data.

CONCLUSIONS

Robotic-assisted colectomy significantly increases the costs of care without providing clear reductions in overall morbidity or length of stay. As the use of robotic technology in colon surgery continues to evolve, critical appraisal of the benefits offered in comparison with the resources consumed is required.

Oncological 3-port laparoscopic colectomy by 1 surgeon and 1 camera operator: a preliminary report

This retrospective study analyzed the short-term outcomes of oncological reduced-port laparoscopic colectomy (RPLC) using 3 ports performed by 1 surgeon and 1 camera operator. Patients who underwent laparoscopic colectomy for colorectal carcinoma in 2010 and 2011 were divided into 2 groups: the CLC group, which included 62 patients who underwent a conventional laparoscopic colectomy and the RPLC group, which included 28 patients who underwent reduced-port laparoscopic colectomy, respectively. There were no significant differences between the groups with regard to TNM stage, estimated blood loss, complications, conversion rate, pain score, the length of postoperative stay, or the number of harvested lymph nodes. However, the prevalence of right-side colectomy was higher and the operative time was significantly shorter in the RPLC group. RPLC was technically feasible, providing that the appropriate patients were selected. Therefore, even though its surgical benefit might be subtle, we believe that RPLC definitively contributes to the reduction of equipment and manpower costs and will be considered as a standard procedure in the near future.

Safety and feasibility of a laparoscopic colorectal cancer resection in elderly patients

Purpose

The aim of this study is to assess the effects of age on the short-term outcomes of a laparoscopic resection of colorectal cancer in elderly (≥75 years old), as compared with younger (<75 years old), patients.

Methods

A retrospective analysis of patients who underwent laparoscopic surgery for colorectal cancer between January 2007 and December 2009 was performed. There were two groups: age <75 years old (group A) and age ≥75 years old (group B). The perioperative outcomes between group A and group B were compared.

Results

The study included 824 patients in group A and 92 patients in group B. The body mass index (BMI) and the American Society of Anesthesiologists (ASA) score were significantly different between group B and group A (BMI: 22.5 vs. 23.5, P = 0.002; ASA score: 1.88 vs. 1.48, P = 0.001). Mean operating times were similar between the groups (325.4 minutes vs. 351.6 minutes, P = 0.07). We observed a higher overall complication rate in group B than in group A (12.0% vs. 6.2%, P = 0.047), but the number of severe complications of Accordion Severity Classification ≥3 (those that required an invasive procedure) was not significantly different between the two groups (6.5% vs. 3.4%, P = 0.142). There was no significant difference in the length of hospital stay (13.0 days vs. 12.0 days, P = 0.053).

Conclusion

Although the elderly patients had a significantly higher overall postoperative complication rate, no significant difference was seen in either the number of severe complications of Accordion Severity Classification ≥3 or in the length of hospital stay. A laparoscopic colorectal cancer resection in elderly patients, especially those aged 75 years or older, is safe and feasible.

Totally laparoscopic versus laparoscopic-assisted right colectomy for colon cancer: is there any advantage in short-term outcomes? A prospective comparative assessment in our center

BACKGROUND

Several techniques are described in the literature about laparoscopic treatment of the right colon. Among them, laparoscopic-assisted colectomy (LAC) with creation of an extracorporeal ileocolonic anastomosis remains the favourite approach in most centers. So far, total laparoscopic colectomy (TLC) with intracorporeal anastomosis is not widely performed, because it requires adequate skills and competence in the use of mechanical linear staplers and laparoscopic manual sutures. The purpose of this study was to determine prospectively if TLC offers some advantages in short-term outcomes over LAC.

METHODS

A prospective comparative study was designed for 80 consecutive patients who were alternatively treated with TLC and LAC for right colon neoplasms. The following data were collected: operative time, intra- and postoperative complication rate, time to bowel movement, hospitalization time, length of minilaparotomy, number of harvested lymph nodes, and specimen length.

RESULTS

Operative time in TLC resulted significantly longer than in LAC (230 vs. 203 min), complication rate was similar in both groups, with no case of anastomotic dehiscence, two anastomotic bleedings in TLC vs. three in LAC and one case of postoperative ileus for each group. One case of death occurred in LAC patient developing a postoperative severe cardiopulmonary syndrome. Time to first flatus was in favour of TLC (2.2 vs. 2.6 days), whereas hospitalization was comparable. As regards to the oncological parameters of radicality, the specimen length was superior in TLC group, but the number of lymph nodes excised was equivalent. The length of the minilaparotomy was clearly shorter in TLC group (5.5 vs. 7.2 cm).

CONCLUSIONS

No evidence of relevant differences in terms of functional and safety outcomes between the two laparoscopic procedures. TLC determines less abdominal manipulation and shorter incision length, but clear advantages must be still demonstrated. Larger series are necessary to test the superiority of totally laparoscopic procedures for right colectomy.

Long-term outcomes of the australasian randomized clinical trial comparing laparoscopic and conventional open surgical treatments for colon cancer: the Australasian Laparoscopic Colon Cancer Study trial

OBJECTIVE

: We report a multicentered randomized controlled trial across Australia and New Zealand comparing laparoscopic-assisted colon resection (LCR) with open colon resection (OCR) for colon cancer.

BACKGROUND

: Colon cancer is a significant worldwide health issue. This trial investigated whether the short-term benefits associated with LCR for colon cancer could be achieved safely, without survival disadvantages, in our region.

METHODS

: A total of 601 patients with potentially curable colon cancer were randomized to receive LCR or OCR. Primary endpoints were 5-year overall survival, recurrence-free survival, and freedom from recurrence rates, compared using an intention-to-treat analysis.

RESULTS

: On April 5, 2010, 587 eligible patients were followed for a median of 5.2 years (range, 1 week-11.4 years) with 5-year confirmed follow-up data for survival and recurrence on 567 (96.6%). Significant differences between the 2 trial groups were as follows: LCR patients were older at randomization, and their pathology specimens showed smaller distal resection margins; OCR patients had some worse pathology parameters, but there were no differences in disease stages. There were no significant differences between the LCR and OCR groups in 5-year follow-up of overall survival (77.7% vs 76.0%, P = 0.64), recurrence-free survival (72.7% vs 71.2%, P = 0.70), or freedom from recurrence (86.2% vs 85.6%, P = 0.85).

CONCLUSIONS

: In spite of some differences in short-term surrogate oncological markers, LCR was not inferior to OCR in direct measures of survival and disease recurrence. These findings emphasize the importance of long-term data in formulating evidence-based practice guidelines.

Contemporary perioperative care strategies

Background

Historically, the preoperative and postoperative care of patients with gastrointestinal cancer was provided by surgeons. Contemporary perioperative care is a truly multidisciplinary endeavour with implications for cancer-specific outcomes.

Methods

A literature review was performed querying PubMed and the Cochrane Library for articles published between 1966 to 2012 on specific perioperative interventions with the potential to improve the outcomes of surgical oncology patients. Keywords used were: fast-track, enhanced recovery, accelerated rehabilitation, multimodal and perioperative care. Specific interventions included normothermia, hyperoxygenation, surgical-site infection, skin preparation, transfusion, non-steroidal anti-inflammatory drugs, thromboembolism and antibiotic prophylaxis, laparoscopy, radiotherapy, perioperative steroids and monoclonal antibodies. Included articles had to be randomized controlled trials, prospective or nationwide series, or systematic reviews/meta-analyses, published in English, French or German.

Results

Important elements of modern perioperative care that improve recovery of patients and outcomes in surgical oncology include accelerated recovery pathways, thromboembolism and antibiotic prophylaxis, hyperoxygenation, maintenance of normothermia, avoidance of blood transfusion and cautious use of non-steroidal anti-inflammatory drugs, promotion of laparoscopic surgery, chlorhexidine–alcohol skin preparation and multidisciplinary meetings to determine multimodal therapy.

Conclusion

Multidisciplinary management of perioperative patient care has improved outcomes.

Systemic immunologic and inflammatory response after laparoscopic versus open nephrectomy: a prospective cohort trial

PURPOSE

To compare the dynamics of systemic inflammatory indices during laparoscopic nephrectomy (LN) and standard open donor nephrectomy.

PATIENTS AND METHODS

Participants in this cohort study were 54 adults without a history of renal surgery and no evidence of urinary tract infection who underwent transperitoneal LN (n=29) and open donor nephrectomy (n=25, control group). We recorded demographic characteristics, intraoperative parameters, and changes 24 hours postoperatively in systemic inflammatory and immunologic values (body temperature, concentrations of white blood cell count [WBC], C-reactive protein [CRP], interleukin [IL]-6, and tumor necrosis factor [TNF]-α), and compared the mean changes between groups.

RESULTS

Mean age was older in the LN group (45.6 vs 30.9 years; P<0.0001), and mean operative time was significantly shorter (83.1 min vs 101.6 min; P=0.004). Mean postoperative increase in IL-6 and body temperature in LN was significantly less than in control: For IL-6, 15.87 vs 29.09 pg/mL, P=0.03; for body temperature, +0.22°C vs +0.71°C, P=0.001). Mean postoperative increases in levels of other inflammatory markers (CRP, TNF-α, WBC) did not differ significantly. No statistical correlation was found between operative time and changes in IL-6, CRP, TNF-α, WBC, or body temperature.

CONCLUSION

Based on the smaller increase in serum IL-6 as the most important indicator of surgical stress, the surgical trauma-induced immune dysfunction may be less intense after LN than open surgery. This may explain the smooth convalescence after LN.

One-stage, totally laparoscopic major hepatectomy and colectomy for colorectal neoplasm with synchronous liver metastasis: safety, feasibility and short-term outcome

BACKGROUND

Simultaneous surgery for primary colorectal tumor with synchronous liver metastasis has been showed to be safe and effective. One-stage, totally laparoscopic colorectal and minor liver resections have been reported, but there are no data regarding patients requiring simultaneous major hepatectomies and colorectal surgery. We aimed to evaluate the safety, feasibility and short-term outcomes of a small cohort of highly selected patients treated by 1-stage, totally laparoscopic major hepatectomy and colorectal resection.

METHODS

From January 2009 to July 2011, 5 patients (3 women and 2 men) with primary colorectal neoplasm and synchronous monolobar liver metastasis requiring a major hepatectomy underwent attempt of 1-stage, totally laparoscopic approach after neoadjuvant chemotherapy. A retrospective analysis of prospective collected data was performed.

RESULTS

There were no conversions to open procedures. All the patients but 1 underwent a 1-stage laparoscopic resection. Among these, liver procedures were 3 right and 1 left hepatectomy; colonic procedures were 3 sigmoidectomies and 1 anterior resection of the rectum. Median operative time was 495 minutes, and duration of hospital stay, 6 days. Median estimated blood loss was 475 mL (range, 300-630) with no mortality observed. An R0 resection was always achieved. Median follow-up was 14 months (range, 7-20) with 1 recurrence observed in the liver.

CONCLUSION

In highly selected patients, a totally laparoscopic approach is a feasible and safe option to treat primary colorectal neoplasm with synchronous liver metastasis requiring major hepatectomies. These results need to be validated by larger, prospective, randomized studies.

Current state of the art in laparoscopic colorectal surgery for cancer: Update on the multi-centric international trials

Laparoscopic colectomy is now widely applied to cases of malignancy, supported by early data from several large randomized controlled trials. Long-term follow-up is now available from those trials, supporting equivalency of cancer-free and overall survival for open and laparoscopic resections. This promising data has inspired further exploration of other applications of laparoscopic techniques, including use of single incision laparoscopy. This article reviews recent reports of long-term data for colorectal cancer resection from four randomized, prospective international trials.

Minilaparoscopy-assisted transrectal low anterior resection (LAR): a preliminary study

BACKGROUND

Natural orifice translumenal endoscopic surgery (NOTES) represents the evolution of surgery towards less invasive procedures. The feasibility of NOTES transrectal approach has increased its clinical applicability. This report describes a first series of minilaparoscopy-assisted transrectal low anterior resection with double purse-string end-to-end circular stapler anastomoses.

METHODS

Between March and April 2012 three selected patients underwent transrectal minilaparoscopy-assisted natural orifice surgery total mesorectal excision for rectal cancer. All the oncologic principles of open/laparoscopic low anterior resection for rectal cancer were strictly fulfilled. Two patients underwent neoadjuvant treatment. Laparoscopic visualization and assistance was provided through one 10-mm umbilical port and two ports, one of which was used as stoma site (5 mm) and the other as a drain site (2 mm needle port). The specimen was transected transanally followed by the confection of double purse-string lateral/end-to-end anastomoses. There were no intraoperative complications.

RESULTS

Mean operative time was 143 min. Oral intake was initiated on the second postoperative day. Patients were discharged home by day 5. The pathology unit confirmed that distal and circumferential margins were free of tumor invasion, and quality of mesorectum resection was reported satisfactory. One patient had to be readmitted because of severe dehydration due to increased ileostomy output. The patient was discharged at the third day after the readmission without renal failure.

CONCLUSIONS

In this preliminary report, transrectal minilaparoscopy-assisted low anterior resection was feasible and safe. Lateral/end-to-end anastomoses can be considered an interesting alternative to the double-stapling technique. However, it is necessary to further study and develop these procedures, along with careful patient selection, before transrectal low anterior resection may be considered for routine clinical use.

Total laparoscopic sigmoid and rectal surgery in combination with transanal endoscopic microsurgery: a preliminary evaluation in China

BACKGROUND

This study was designed to evaluate the feasibility and safety of total laparoscopic sigmoid and rectal surgery without abdominal incision in combination with transanal endoscopic microsurgery (TEM).

METHODS

From May 2010 to October 2011, 34 patients with colon and rectal tumors were treated by total laparoscopic surgery without abdominal incision, and the clinical data of these patients were reviewed.

RESULTS

All operations could be successfully accomplished without conversion to open surgery. No diverting ileostomy was created. The average operative time was 151.60 (range, 125-185) minutes. The average blood loss was 200.20 (range, 55-450) ml. All resection margins were negative. Six patients developed postoperative anastomotic leakage. There were no reports of other complications in all patients.

CONCLUSIONS

This preliminary study indicated that total laparoscopic sigmoid and rectal surgery in combination with TEM was a safe, feasible, and minimally invasive technique. This advanced surgical technique was developed by combining laparoscopy with the concept of natural orifice transluminal endoscopic surgery.

Neutrophils promote liver metastasis via Mac-1-mediated interactions with circulating tumor cells

Although circulating neutrophils are associated with distant metastasis and poor outcome in a number of epithelial malignancies, it remains unclear whether neutrophils play an active causal role in the metastatic cascade. Using in vivo models of metastasis, we found that neutrophils promote cancer cell adhesion within liver sinusoids and, thereby, influence metastasis. Neutrophil depletion before cancer cell inoculation resulted in a decreased number of gross metastases in an intrasplenic model of liver metastasis. This effect was reversed when inflamed neutrophils were co-inoculated with cancer cells. In addition, early adhesion within liver sinusoids was inhibited in the absence of neutrophils and partially restored with a short perfusion of isolated activated neutrophils. Intravital microscopy showed that cancer cells adhered directly on top of arrested neutrophils, indicating that neutrophils may act as a bridge to facilitate interactions between cancer cells and the liver parenchyma. The adhesion of lipopolysaccharide-activated neutrophils to cancer cells was mediated by neutrophil Mac-1/ICAM-1. Our findings, therefore, show a novel role for neutrophils in the early adhesive steps of liver metastasis.

Survival after elective surgery for colonic cancer in Denmark

AIM

Total mesorectal excision (TME) has been shown to improve the outcome for patients with rectal cancer. In contrast, there are fewer data on complete mesocolic excision (CME) for colonic cancer.

METHOD

Data from the National Colorectal Cancer Database were analysed. This includes about 95% of all patients with colorectal cancer in Denmark. Only patients having elective surgery for colonic cancer in the period 2001-2008 were included. Overall and relative survival analyses were carried out. The study period was divided into the periods 2001-2004 and 2005-2008.

RESULTS

9149 patients were included for the final analysis. The overall 5-year survival rates were 0.65 in 2001-2004 and 0.66 in 2005-2008. The relative 5-year survival rates were also within 1% of each other. None of these comparisons was statistically significant.

CONCLUSION

Survival following elective colon cancer surgery has been almost unchanged since 2001.

Laparoscopic-assisted colectomy in a patient with colon cancer after percutaneous endoscopic gastrostomy

BACKGROUND

A number of patients undergo percutaneous endoscopic gastrostomy (PEG) under various conditions. Open colectomy is usually performed for colon cancer in patients with PEG because the safety of the laparoscopic approach for such patients has not been established. However, if the laparoscopic approach is possible in patients with PEG, it will be less invasive and more helpful in rehabilitation into society.

CASE PRESENTATION

We describe the case of a 64-year-old male with a T1 adenocarcinoma of the ascending colon 2 years after surgery for nasal cancer and PEG for dysphagia. The patient did not have any distant metastases or malignant tumors on preoperative computed tomography and positron-emission tomography. He underwent laparoscopic-assisted colectomy (LAC) with lymph node dissection. No complications developed during or after the surgery.

CONCLUSIONS

LAC could be a potential option for the treatment of colon cancer in patients who have undergone PEG. To our knowledge, this is the first recorded case of an ascending colon cancer treated with LAC under the condition of gastrostoma.

[Perioperative tumour dissemination. 1. Influence of perioperative factors]

There has been growing concern in the last few years on the effect of anaesthetic drugs used during oncological surgery could have on tumour progression in the long-term, as well as the influence of other perioperative factors. Although much of the available data has weak evidence, the role of the surgery itself, pain, transfusion of blood derivatives, etc., have been assessed in several studies. How some substances used during the anaesthetic process can influence tumour immune surveillance, cell proliferation or tumour angiogenesis processes have been observed in laboratory studies. The possible relevance of the anaesthetic technique used as regards the long-term tumour progression and survival is still to be determined. However, based on retrospective studies, it seems that those anaesthetic techniques combined with the use of regional anaesthesia and analgesia could be beneficial compared to those that are maintained on opioid use. Further research should help to elucidate the long-term clinical relevance of the perioperative procedures, including the anaesthetic, during oncological surgery.

Outcomes of laparoscopic colon cancer surgery in a population-based cohort in British Columbia: are they as good as the clinical trials?

BACKGROUND

Randomized controlled trials have shown equivalent outcomes for laparoscopic-assisted colectomy (LAC) and open colectomy (OC) when performed by well-trained surgeons experienced in both techniques. Our goal was to evaluate the outcomes of LAC at a population level.

METHODS

Using the prospectively collected Gastrointestinal Cancer Outcomes Unit database from the British Columbia Cancer Agency, short- and long-term outcomes in patients with colon cancer treated with LAC and OC were compared from 2003 to 2008 inclusive.

RESULTS

There was a statistically significant increase in the proportion of LAC from 2003 to 2008 (P < .001). LAC was more likely to be performed in the elective setting (P < .001) and for smaller tumors (P < .001). A similar proportion of patients had a minimum of 12 lymph nodes identified by pathology (58% vs 60%, P = not significant). Disease-free survival was similar for the 2 groups after adjusting for stage, emergency presentation, and adjuvant chemotherapy. There was no difference in overall survival.

CONCLUSIONS

The introduction of LAC for colon cancer in British Columbia outside of optimized clinical trial conditions appears to be effective and safe.

Totally laparoscopic versus laparoscopic assisted right colectomy for cancer

INTRODUCTION

Colorectal cancer (CRC) is one of the leading causes of cancer death all over the world and right-sided colon cancer represents approximately 15% of all cases of CRC. Laparoscopic colectomies produce advantages in short-term outcome compared to open procedures and have recently benefited by a long term oncologic validation. This study was designed to compare the short- and medium-term surgical outcomes of totally laparoscopic (TLRC) and laparoscopic-assisted right colectomy (LARC) for neoplasia, hypothesizing they may be at least similar.

METHODS

A consecutive unselected series of 72 patients undergone elective surgery for right-sided colon cancer from April 2006 to April 2011 was retrospectively evaluated. All patients were treated by laparoscopic medial-to-lateral right colectomy. In 42 patients a TLRC was performed, in 30 a LARC. Perioperative care plan, operative steps and surgical instrumentations were standardized. All the operations were performed or supervised by the same Surgeon (I.S.). Data on the patients' demographics, disease features, operative details and follow up were recorded and analyzed. Complications were classified using the Clavien-Dindo classification system. Continuous variables were expressed as mean ± standard deviation and analyzed with the Student t test. Categorical ones were expressed as percent value and analyzed with Fischer test or Chi-square test, where appropriate. P < 0.05 were considered statistically significant.

RESULTS

There was no significant difference in term of age, sex, body mass index and American Society of Anesthesiology score between the two groups. Comorbidities, site of tumor and stage of disease were similar too. No conversion to laparotomy was registered. Median operative time (186.3 ± 40.1 min vs 176.5 ± 40.0 min; not significant (NS)) and estimated blood loss (43.3 ± 89.8 ml vs 31.2 ± 51.3 ml; NS) were statistically comparable in both groups. Timing of first defecation (3.4 ± 0.9 dd vs 2.9 ± 0.9; P = 0.023) and length of hospital stay (7.2 ± 1.3 dd vs 6.2 ± 1.1 dd; P < 0.001) were statistically lower in TLRC cohort. A significantly longer length of skin incision characterized LARC group compared with TLRC group (71.0 ± 13.5 mm vs 48.2 ± 10.2 mm; P < 0.001). Both groups achieved an adequate number of lymph nodes harvested (22.0 ± 8.2 vs 25.9 ± 9.0; P = 0.036) and oncological resection of the tumor (proximal margin 7.6 ± 7.7 vs 6.1 ± 3.8; NS - distal margin 13.3 ± 7.7 vs 13.6 ± 5.8; NS). Post-operative complications according to Clavien-Dindo classification were statistically comparable in both cohorts. No readmission within 60 days of discharge was observed. The mean follow-up recorded was 27.7 ± 16.6 months. Late complications consisted in 1 case of incisional hernia (3.8%) in LARC group.

CONCLUSIONS

Although more appropriate indications must be set by future studies, we encourage the choice of a TLRC for the treatment of cancer of the right colon. TLRC is actually a feasible and safe technique, which has resulted in an encouraging short-term outcome, low incidence of major complications and preservation of oncologic principles, without affecting operative times.

Laparoscopic complete mesocolic excision for right colon cancer

Laparoscopic colectomy for colon cancer has become a standard of care, with a number of publications highlighting its safety, improved postoperative recovery, and excellent oncologic outcomes. Complete mesocolic excision, recently reemphasized, is associated with superior oncologic outcomes, although this has not been discussed for laparoscopic surgery. A laparoscopic approach was performed for right colon cancer using a four-trocar technique. The key steps demonstrated are identification and high division of the ileocolic pedicle, medial-to-lateral mobilization of the ascending colon preserving the posterior mesocolic fascia, identification and high division of the right branch of the middle colic artery, mobilization of the greater omentum and hepatic flexure, completion of lateral mobilization of the ascending colon from the retroperitoneum, and mobilization of the small bowel mesentery up to the duodenum. A prospective series of 52 consecutive patients with right colon cancer underwent laparoscopic complete mesocolic excision with high-vessel ligation. Four of the patients required laparoscopic en bloc extended resections for local invasion. The median operative time was 136 min (interquartile range [IQR], 105-167 min), and the median blood loss was 20 ml (IQR, 10-45 ml). The median hospital stay was 3 days (IQR, 3-5 days). All the patients had an R0 oncologic resection with median margins of 12 cm, and a median of 22 lymph nodes (IQR, 18-29 lymph nodes) was retrieved. The median follow-up period was 38 months (IQR, 23-54 months). Of 14 patients with tumor-positive lymph nodes, 2 experienced distant recurrence. There were no local recurrences, but four patients experienced metastatic disease at a median of 37 months (IQR, 22-46 months). The median overall survival time was 38 months (IQR, 23-54 months). The embedded didactic video demonstrates a straight laparoscopic complete mesocolic excision with high-vessel ligation for a patient who had a right colon cancer. Laparoscopic right complete mesocolic excision is a safe and effective procedure associated with excellent 3-year oncologic outcomes and accelerated postoperative recovery.

Shifting concepts in rectal cancer management: a review of contemporary primary rectal cancer treatment strategies

The management of rectal cancer has transformed over the last 3 decades and continues to evolve. Some of these changes parallel progress made with other cancers: refinement of surgical technique to improve organ preservation, selective use of neoadjuvant (and adjuvant) therapy, and emergence of criteria suggesting a role for individually tailored therapy. Other changes are driven by fairly unique issues including functional considerations, rectal anatomic features, and surgical technical issues. Further complexity is due to the variety of staging modalities (each with its own limitations), neoadjuvant treatment alternatives, and competing strategies for sequencing multimodal treatment even for nonmetastatic disease. Importantly, observations of tumor response made in the era of neoadjuvant therapy are reshaping some traditionally held concepts about tumor behavior. Frameworks for prioritizing and integrating complex data can help to formulate treatment plans for patients.

Kwon S, Billingham R, Farrokhi E, Florence M, Herzig D, Horvath K, Rogers T, Steele S, Symons R, Thirlby R, Whiteford M, Flum DR. Adoption of laparoscopy for elective colorectal resection: a report from the Surgical Care and Outcomes Assessment Program

BACKGROUND

The purpose of this study was to evaluate the adoption of laparoscopic colon surgery and assess its impact in the community at large.

STUDY DESIGN

The Surgical Care and Outcomes Assessment Program (SCOAP) is a quality improvement benchmarking initiative in the Northwest using medical record-based data. We evaluated the use of laparoscopy and a composite of adverse events (ie, death or clinical reintervention) for patients undergoing elective colorectal surgery at 48 hospitals from the 4th quarter of 2005 through 4th quarter of 2010.

RESULTS

Of the 9,705 patients undergoing elective colorectal operations (mean age 60.6 ± 15.6 years; 55.2% women), 38.0% were performed laparoscopically (17.8% laparoscopic procedures converted to open). The use of laparoscopic procedures increased from 23.3% in 4th quarter of 2005 to 41.6% in 4th quarter of 2010 (trend during study period, p < 0.001). After adjustment (for age, sex, albumin levels, diabetes, body mass index, comorbidity index, cancer diagnosis, year, hospital bed size, and urban vs rural location), the risk of transfusions (odds ratio [OR] = 0.52; 95% CI, 0.39-0.7), wound infections (OR = 0.45; 95% CI, 0.34-0.61), and composite of adverse events (OR = 0.58; 95% CI, 0.43-0.79) were all significantly lower with laparoscopy. Within those hospitals that had been in SCOAP since 2006, hospitals where laparoscopy was most commonly used also had a substantial increase in the volume of all types of colon surgery (202 cases per hospital in 2010 from 112 cases per hospital in 2006, an 80.4% increase) and, in particular, the number of resections for noncancer diagnoses and right-sided pathology.

CONCLUSIONS

The use of laparoscopic colorectal resection increased in the Northwest. Increased adoption of laparoscopic colectomies was associated with greater use of all types of colorectal surgery.

Expert opinion on laparoscopic surgery for colorectal cancer parallels evidence from a cumulative meta-analysis of randomized controlled trials

BACKGROUND

This study sought to synthesize survival outcomes from trials of laparoscopic and open colorectal cancer surgery, and to determine whether expert acceptance of this technology in the literature has parallel cumulative survival evidence.

STUDY DESIGN

A systematic review of randomized trials was conducted. The primary outcome was survival, and meta-analysis of time-to-event data was conducted. Expert opinion in the literature (published reviews, guidelines, and textbook chapters) on the acceptability of laparoscopic colorectal cancer was graded using a 7-point scale. Pooled survival data were correlated in time with accumulating expert opinion scores.

RESULTS

A total of 5,800 citations were screened. Of these, 39 publications pertaining to 23 individual trials were retained. As well, 414 reviews were included (28 guidelines, 30 textbook chapters, 20 systematic reviews, 336 narrative reviews). In total, 5,782 patients were randomized to laparoscopic (n = 3,031) and open (n = 2,751) colorectal surgery. Survival data were presented in 16 publications. Laparoscopic surgery was not inferior to open surgery in terms of overall survival (HR = 0.94, 95% CI 0.80, 1.09). Expert opinion in the literature pertaining to the oncologic acceptability of laparoscopic surgery for colon cancer correlated most closely with the publication of large RCTs in 2002-2004. Although increasingly accepted since 2006, laparoscopic surgery for rectal cancer remained controversial.

CONCLUSIONS

Laparoscopic surgery for colon cancer is non-inferior to open surgery in terms of overall survival, and has been so since 2004. The majority expert opinion in the literature has considered these two techniques to be equivalent since 2002-2004. Laparoscopic surgery for rectal cancer has been increasingly accepted since 2006, but remains controversial. Knowledge translation efforts in this field appear to have paralleled the accumulation of clinical trial evidence.

Lymph node harvested in laparoscopic versus open colorectal cancer approaches: a meta-analysis

Increasing researches have reported the safety and efficacy of laparoscopic versus open approach for colorectal cancer resection; however, the number of lymph nodes harvested in the 2 approaches is still unclear. This meta-analysis is to compare the number of lymph node harvested in these 2 methods. We searched the PUBMED, the EMBASE, and the Cochrane Library up to July 1, 2011 for relevant studies. Twenty-four randomized controlled trials, comprising 6264 participants, met our criterion. We found no difference in the number of lymph nodes harvested in these 2 approaches (weighted mean difference=-0.25; 95% confidence interval, -0.57 to 0.08; P=0.542), as well as in subgroups of colon cancer and of rectal cancer. Our meta-analysis suggests that laparoscopic surgery could achieve the same effectiveness with open surgery in relation to lymph node harvested. Surgeons should pay appropriate attention on the excision of lymph nodes, which are associated with long-term benefits of patients.

Laparoscopic versus open colorectal resections in patients with symptomatic stage IV colorectal cancer

BACKGROUND

The purpose of this study was to evaluate short-term and oncologic outcomes of laparoscopic resection (LR) for patients with symptomatic stage IV colorectal cancer compared with open resection (OR).

METHODS

This study is a retrospective analysis of a prospective database. Patients with a minimum follow-up of 12 months after LR or OR for metastatic colorectal cancer were included. All analyses were performed on an "intention-to-treat" basis.

RESULTS

A total of 162 consecutive patients submitted to LR and 127 submitted to OR were included. In the LR group, conversion rate was 26.5 %, mostly due to locally advanced disease (88.4 %). A greater risk of conversion was observed among patients with a tumor size greater than 5 cm regardless the tumor site (P = 0.07). Early postoperative outcome was significantly better for LR group, with a shorter hospital stay (P = 0.008), earlier onset of adjuvant treatment, and similar postoperative complications (P = 0.853) and mortality rates (P = 0.958). LR for rectal cancer was associated with a higher morbidity compared with colon cancer (P = 0.058). During a median follow-up time of 72 months, there was no significant difference in overall survival between the two groups (P = 0.622).

CONCLUSIONS

LR for symptomatic metastatic CRC is safe and, compared with OR, is associated with a shorter hospital stay and with similar survival rates. Concerns remain about LR of bulky tumors and rectal cancers due to the increased risk of conversion and postoperative complications.

Single-institute prospective trial of laparoscopy-assisted distal gastrectomy with systemic lymph node dissection for early gastric carcinoma

BACKGROUND

Laparoscopy-assisted gastrectomy (LAG) is an advanced surgery that requires the mastery of complex surgical skills. We evaluate the feasibility of LAG with systemic lymph node dissection when participating surgeons have sufficient knowledge and experience to conduct open surgery for gastric cancer and basic laparoscopic skills.

METHODS

All operations were performed by two Japan Surgical Society board-certified attending surgeons who had performed over 50 conventional gastrectomies and 30 laparoscopic cholecystectomies. The surgeons went through an established program, including training at the wet and dry laboratories. In addition, surgeries for the first 10 cases were assisted by an expert surgeon with experience of >300 cases. To be eligible for the LAG procedure, patients had to have a preoperative diagnosis of T1, N0 and M0 gastric carcinoma. The morbidity rate was used as the study endpoint. Variables such as operating time, intraoperative blood loss and number of retrieved lymph nodes were evaluated as complementary surgical endpoints. These variables were compared between the first 25 cases and the latter 25 cases.

RESULTS

A total of 50 patients who were scheduled to undergo LAG were prospectively enrolled between 2005 and 2008. Morbidity rate was 4% (2/50), with one case due to intestinal injury and one case due to an intra-abdominal abscess. Complications related to laparoscopy were observed in 2% (1/50), with one case of mesenteric injury. The conversion rate to laparotomy was 6% (3/50). However, there were no serious consequences in converted cases. The operating time was 263.7 ± 45.0 min. The intraoperative blood loss was 94.5 ± 106.5 g. The total number of regional lymph nodes retrieved was 34.7 ± 12.2. A significant improvement in the blood loss was only noted after the first 25 procedures. All patients are alive and disease-free after a median follow-up of 38.8 months.

CONCLUSION

An adequate training program, including site visits by expert surgeons, in conjunction with basic laparoscopy skills and solid backgrounds in open gastrectomy from the perspective of the trainees are currently key to the successful and safe implementation of LAG. Whether the procedure is oncologically feasible remains to be confirmed by long-term follow-up.

Minimal access maximal success; a myth or a reality

Minimal invasive surgery is one of the most challenging advances in the craft of surgery in last 2 decades. In our country the advanced craft has been in practice for more than one and a half decade and some of our committed surgeons have mastered this craft and made an impact not only on national level but also on international level. Many times we may get impressed by watching the masters in the craft but forgetting the efforts the master has put in to reach the Zenith and in a bid to imitate the master we may ignore the awaiting disaster. In this article I will be discussing the overall impact of this surgical craft globally and its various evidence based pros and cons with a particular reference to colorectal surgery to ascertain whether the craft of minimal access with maximal success is a myth or a reality.

Simultaneous laparoscopic multi-organ resection combined with colorectal cancer: Comparison with non-combined surgery

AIM: To access the short-term outcomes of simultaneous laparoscopic surgery combined with resection for synchronous lesions in patients with colorectal cancer.

METHODS: Between March 1996 and April 2010 prospectively collected data were reviewed from 93 consecutive patients who had colorectal cancer and underwent simultaneous multiple organ resection (combined group) and 1090 patients who underwent conventional laparoscopic right hemicolectomy or laparoscopic low/anterior resection for colorectal cancer (non-combined group). In the combined group, there were nine gastric resections, three nephrectomies, nine adrenalectomies, 56 cholecystectomies, and 21 gynecologic resections. In addition, five patients underwent simultaneous laparoscopic resection for three organs. The patient demographics, intra-operative outcomes, surgical morbidity, and short-term outcomes were compared between the two groups (the combined and non-combined groups).

RESULTS: There were no significant differences in the clinicopathological variables between the two groups. The operating time was significantly longer in the combined group than in the non-combined group, regardless of tumor location (laparoscopic right hemicolectomy and laparoscopic low/anterior resection groups; P = 0.048 and P < 0.001, respectively). The other intra-operative outcomes, such as the complications and open conversion rate, were similar in both groups. The rate of post-operative morbidity in the combined group was similar to the non-combined group (combined vs non-combined, 15.1% vs 13.5%, P = 0.667). Oncological safety for the colon and synchronous lesions were obtained in the combined group.

CONCLUSION: Simultaneous laparoscopic multiple organ resection combined with colorectal cancer is a safe and feasible option in selected patients.

The quality of research synthesis in surgery: the case of laparoscopic surgery for colorectal cancer

BACKGROUND

Several systematic reviews and meta-analyses populate the literature on the effectiveness of laparoscopic surgery for colorectal cancer. The utility of this body of work is unclear. The objective of this study was to synthesize all such systematic reviews in terms of clinical effectiveness, to appraise their quality, and to determine whether areas of duplication exist across reviews.

METHODS

Systematic reviews comparing laparoscopic and open surgery for colorectal cancer were identified using a comprehensive search protocol (1991 to 2008). The primary outcome was overall survival. The methodological quality of reviews was appraised using the Assessment of Multiple Systematic Reviews (AMSTAR) instrument. Abstraction and quality appraisal was carried out by two independent reviewers. Reviews were synthesized, and outcomes were compared qualitatively. A citation analysis was carried out using simple matrices to assess the comprehensiveness of each review.

RESULTS

In total, 27 reviews were included; 13 reviews included only randomized controlled trials. Rectal cancer was addressed exclusively by four reviews. There was significant overlap between review purposes, populations and, outcomes. The mean AMSTAR score (out of 11) was 5.8 (95% CI: 4.6 to 7.0). Overall survival was evaluated by ten reviews, none of which found a significant difference. Three reviews provided a selective meta-analysis of time-to-event data. Previously published systematic reviews were poorly and highly selectively referenced (mean citation ratio 0.16, 95% CI: 0.093 to 0.22). Previously published trials were not comprehensively identified and cited (mean citation ratio 0.56, 95% CI: 0.46 to 0.65).

CONCLUSIONS

Numerous overlapping systematic reviews of laparoscopic and open surgery for colorectal cancer exist in the literature. Despite variable methods and quality, survival outcomes are congruent across reviews. A duplication of research efforts appears to exist in the literature. Further systematic reviews or meta-analyses are unlikely to be justified without specifying a significantly different research objective. This works lends support to the registration and updating of systematic reviews.