Laparoscopic hepatic resection for metastatic liver tumor of colorectal cancer: comparative analysis of short- and long-term results

Outcomes and Patient Selection in Laparoscopic vs. Open Liver Resection for HCC and Colorectal Cancer Liver Metastasis

Hepatocellular carcinoma (HCC) and colorectal liver metastasis (CRLM) are the two most common malignant tumors that require liver resection. While liver transplantation is the best treatment for HCC, organ shortages and high costs limit the availability of this option for many patients and make resection the mainstay of treatment. For patients with CRLM, surgical resection with negative margins is the only potentially curative option. Over the last two decades, laparoscopic liver resection (LLR) has been increasingly adopted for the resection of a variety of tumors and was found to have similar long-term outcomes compared to open liver resection (OLR) while offering the benefits of improved short-term outcomes. In this review, we discuss the current literature on the outcomes of LLR vs. OLR for patients with HCC and CRLM. Although the use of LLR for HCC and CRLM is increasing, it is not appropriate for all patients. We describe an approach to selecting patients best-suited for LLR. The four common difficulty-scoring systems for LLR are summarized. Additionally, we review the current evidence behind the emerging robotically assisted liver resection technology.

Recent Advances in Minimally Invasive Liver Resection for Colorectal Cancer Liver Metastases-A Review

Minimally invasive surgical (MIS) approaches to liver resection have been increasingly adopted into use for surgery on colorectal cancer liver metastases. The purpose of this review is to evaluate the outcomes when comparing laparoscopic liver resection (LLR), robotic liver resection (RLR), and open liver resection (OLR) for colorectal cancer liver metastases (CRLM) in 39 studies (2009-2022) that include a case-matched series, propensity score analyses, and three randomized clinical trials. LLR is associated with less intraoperative blood loss and shorter hospital stay compared with OLR. LLR can be performed with comparable operative time. LLR has similar rates of perioperative complications and mortality as OLR. There were no significant differences in 5-year overall or disease-free survival between approaches. Robotic liver resection (RLR) has comparable perioperative safety to LLR and may improve rates of R0 resection in certain patients. Finally, MIS approaches to the hepatic resection of CRLM reduce the time from liver resection to initiation of adjuvant chemotherapy. Thus, MIS liver surgery should be considered in the array of options for patients with CRLM, though thoughtful patient selection and surgeon experience should be part of that decision.

OUP accepted manuscript

Background

Laparoscopic liver resection (LLR) is a highly demanding procedure with great variability. Previously published randomized trials have proven oncological safety of laparoscopic liver resection (LLR) as compared to open surgery. However, these were started after the learning curve (LC) was established. This leaves the question of whether the LC of LLR in the early laparoscopic era has affected the survival of patients with colorectal liver metastasis (CRLM).

Methods

All consecutive LLRs performed by a single surgeon between 2000 and 2019 were retrospectively analysed. A risk-adjusted cumulative sum (RA-CUSUM) chart for conversion rate and the log regression analysis of the blood loss identified two phases in the LC. This was then applied to patients with CRLM, and the two subgroups were compared for recurrence-free (RFS) and overall survival (OS). The analysis was repeated with propensity score-matched (PSM) groups

Results

A total of 286 patients were included in the LC analysis, which identified two distinct phases, the early (EP; 68 patients) and the late (LP; 218 patients) phases. The LC was applied to 192 patients with colorectal liver metastasis (EPc, 45 patients; LPc, 147 patients). For patients with CRLM, R0 resection was achieved in 93 per cent: 100 per cent in the EPc group and 90 per cent in the LPc group (P = 0.026). Median OS and RFS were 60 and 16 months, respectively. The 5-year OS and RFS were 51 per cent and 32.7 per cent, respectively. OS (hazard ratio (h.r.) 0.78, 95 per cent confidence interval (c.i.) 0.51 to 1.2; P = 0.286) and RFS (h.r. 0.94, 95 per cent c.i. 0.64 to 1.37; P = 0.760) were not compromised by the learning curve. The results were replicated after PSM.

Conclusion

In our experience, the development of a laparoscopic liver resection programme can be achieved without adverse effects on the long-term survival of patients with CRLM.

An Integrated Strategy for Rapid Hemostasis during Tumor Resection and Prevention of Postoperative Tumor Recurrence of Hepatocellular Carcinoma by Antibacterial Shape Memory Cryogel

The inevitable bleeding during tumor resection greatly increases the risk of tumor recurrence caused by metastasis of cancer cells with blood, and hemostasis and prevention of post-operation tumor recurrence is still a challenge. However, a biomaterials approach for rapid hemostasis during tumor resection and simultaneous prevention of tumor recurrence is rarely reported. Here, zeolitic imidazolate framework (ZIF-8) nanoparticle-enhanced multinetwork cryogels are proposed which provide an integrated treatment regimen for rapid hemostasis through intraoperative blood trigger shape recovery and enhanced coagulation, and prevention of postoperative cancer recurrence via sonodynamic anticancer in a hepatocellular carcinoma model. A series of antibacterial shape memory multifunctional cryogels are synthesized based on glycidyl methacrylate-functionalized quaternized chitosan (QCSG), dopamine-modified hyaluronic acid (HA-DA), and hematoporphyrin monomethyl ether (HMME)-loaded dopamine-modified ZIF-8 (ZDH). Blood loss in different bleeding models confirms good hemostasis of ZIF-8 loading cryogels. Besides, in vitro tests confirm that QCSG/HA-DA/ZDH (QH/ZDH) cryogels significantly killed cancer cells by generating reactive oxygen species under ultrasound. Finally, significantly reduced tumor recurrence after the resection of ectopic hepatocellular carcinoma further confirms the good effect of QH/ZDH cryogels in preventing recurrence by a coordinated strategy of intraoperative hemostasis and postoperative sonodynamic therapy by pH-responsive HMME release, showing great potential in clinical application.

Laparoscopic liver resection for colorectal liver metastases - short- and long-term outcomes: A systematic review

BACKGROUND

For well-selected patients and procedures, laparoscopic liver resection (LLR) has become the gold standard for the treatment of colorectal liver metastases (CRLM) when performed in specialized centers. However, little is currently known concerning patient-related and peri-operative factors that could play a role in survival outcomes associated with LLR for CRLM.

AIM

To provide an extensive summary of reported outcomes and prognostic factors associated with LLR for CRLM.

METHODS

A systematic search was performed in PubMed, EMBASE, Web of Science and the Cochrane Library using the keywords "colorectal liver metastases", "laparoscopy", "liver resection", "prognostic factors", "outcomes" and "survival". Only publications written in English and published until December 2019 were included. Furthermore, abstracts of which no accompanying full text was published, reviews, case reports, letters, protocols, comments, surveys and animal studies were excluded. All search results were saved to Endnote Online and imported in Rayyan for systematic selection. Data of interest were extracted from the included publications and tabulated for qualitative analysis.

RESULTS

Out of 1064 articles retrieved by means of a systematic and grey literature search, 77 were included for qualitative analysis. Seventy-two research papers provided data concerning outcomes of LLR for CRLM. Fourteen papers were eligible for extraction of data concerning prognostic factors affecting survival outcomes. Qualitative analysis of the collected data showed that LLR for CRLM is safe, feasible and provides oncological efficiency. Multiple research groups have reported on the short-term advantages of LLR compared to open procedures. The obtained results accounted for minor LLR, as well as major LLR, simultaneous laparoscopic colorectal and liver resection, LLR of posterosuperior segments, two-stage hepatectomy and repeat LLR for CRLM. Few research groups so far have studied prognostic factors affecting long-term outcomes of LLR for CRLM.

CONCLUSION

In experienced hands, LLR for CRLM provides good short- and long-term outcomes, independent of the complexity of the procedure.

Hand-assisted Laparoscopic Repeat Hepatectomy for Secondary Liver Neoplasm

BACKGROUND

Hand-assisted laparoscopic surgery is a widely accepted alternative to an open approach. The use of this technique in repeat liver resection is limited due to technical difficulties caused by postsurgical adhesions. We aimed to assess the feasibility and safety of hand-assisted laparoscopic repeat hepatectomy (HALRH).

MATERIALS AND METHODS

This was a retrospective study of the medical files of patients who had undergone HALRH between 2010 and 2017 in 2 university-affiliated medical centers.

RESULTS

Sixteen patients with repeat hepatectomy were included with a median age of 67.5 years. The first liver resection was a traditional laparotomy for 9 patients and hand-assisted laparoscopic surgery for 7 patients. The conversion rate to open surgery was 6%. The median operative time, blood loss during surgery, and postoperative hospital stay were 166 minutes, 400 mL, and 7 days, respectively. R0 resections were achieved in 88% of patients. The median number of tumors and tumor size were 1 and of 25 mm, respectively. There were no mortalities or major complications postoperatively. For patients with colorectal liver metastases, the median follow-up and overall survival were 21 and 43 months, respectively.

CONCLUSION

The findings suggest HALRH to be safe and feasible. Future ERAS guidelines should evaluate this approach for liver surgery.

Hand-assisted Laparoscopic Surgery for Colorectal Liver Metastasis: Analysis of Short-term and Long-term Results

BACKGROUND

There is scant data regarding the outcomes of hand-assisted laparoscopic surgery (HALS) for colorectal liver metastasis (CRLM). The aim of this study is to report our experience and analyze the short-term and long-term results.

MATERIALS AND METHODS

Retrospective study of patients undergoing HALS for CRLM in 2 university affiliated medical centers.

RESULTS

Two hundred and thirty-eight liver procedures were performed on 145 patients including 205 parenchymal sparing resections and 33 anatomic resections. The median number of metastases was 1 (range: 1 to 8), 38 patients (26.2%) had 3 or more metastases, and 41 patients (28.3 had a bi-lobar disease. The tumor size was 20 (2 to 90) mm, and 52 patients (36.6%) had a tumor larger than 30 mm. Nighty-nine patients (67.8%) received neoadjuvant chemotherapy. In 8 patients (5.5%) the laparoscopic liver resection was combined with ablation, and 16 patients (11%) underwent a synchronous resection of colorectal cancer. The median operative time, blood loss during surgery, and postoperative hospital stay were 163 minutes, 300 mL, and 4 days, respectively. The median modified Iwate complexity score was 4 (0 to 10) and the conversion rate to open surgery was 5.5%. The overall and major complication rates were 23.8% and 3.6%, respectively. The mortality rate was 0.7%. R0 resections were achieved in 91% of patients. Median overall survival for all the cohort (intend to treat) was 59 months, and the 8- and 10-year overall survival rates were 47.3% and 24.9%, respectively.

CONCLUSIONS

This study shows that HALS is a safe and efficacious treatment for selected patients with CRLM.

The actual management of colorectal liver metastases

Colorectal cancer is one of the most frequent cancers in the world and between 50% and 60% of patients will develop colorectal liver metastases (CRLM) during the disease. There have been great improvements in the management of CRLM during the last decades. The combination of modern chemotherapeutic and biological systemic treatments with aggressive surgical resection strategies is currently the base for the treatment of patients considered unresectable until few years ago. Furthermore, several new treatments for the local control of CRLM have been developed and are now part of the arsenal of multidisciplinary teams for the treatment of these complex patients. The aim of this review was to summarize and update the management of CRLM, its controversies and relevant evidence.

A comparison between robotic, laparoscopic and open hepatectomy: A systematic review and network meta-analysis

BACKGROUND

The evidence of pairwise meta-analysis of Robotic Hepatectomy (RH) vs Laparoscopic Hepatectomy (LH) and RH vs Open Hepatectomy (OH) is inconclusive. Therefore, the aim of this study, was to compare the outcomes of RH, LH and OH by performing a network meta-analysis.

METHODS

A systematic literature search was performed in the following databases: Pubmed, Google scholar, EMBASE and Cochrane library. Cost-effectiveness and survival benefits were selected as primary outcomes.

RESULTS

The cost was less in OH compared to both minimally invasive procedures, LH demonstrated lower cost compared to RH, but the differences were not statistically significant. Both the RH and LH cohorts demonstrated significantly lower estimated blood loss, reduced major morbidity rate and shorter length of stay compared to OH cohort. The LH and OH cohorts demonstrated significantly shorter operative time and duration of clamping compared to the RH cohort. The LH cohort included significantly smaller tumours compared to the OH cohort.

CONCLUSION

The present network meta-analysis, demonstrated that both RH and LH in malignant and benign conditions were associated with lower morbidity rates, shorter hospital stay and the procedure related costs were statistically nonsignificant between RH, LH and OH.

Open versus minimally invasive liver surgery for colorectal liver metastases (LapOpHuva): a prospective randomized controlled trial

OBJECTIVE

To present surgical and oncological outcomes using a prospective and randomized trial (LapOpHuva, NCT02727179) comparing minimally invasive liver resection (LLR) versus open liver resection (OLR) in patients with colorectal liver metastases (CRLM).

METHODS

Between February 2005 and March 2016, 204 selected patients with CRLM were randomized and 193 were included: LLR (n = 96) and OLR (n = 97). The primary endpoint was to compare postoperative morbidity. Other secondary endpoints were oncological outcomes, use of the Pringle maneuver, surgical time, blood losses, transfusions, hospital stay, mortality and OS, and disease-free survival (DFS) at 3, 5, and 7 years.

RESULTS

LLR presented with lower global morbidity (11.5% vs. 23.7%, p = 0.025) but with similar severe complications. Long-term survival outcomes were similar in both groups. The cumulative 1-, 3-, 5-, 7-year OS for LLR and OLR were 92.5%, 71.5%, 49.3%, 35.6% versus 93.6%, 69.7%, 47.4%, 35.5%, respectively (log-rank = 0.047, p = 0.82). DFS for LLR and OLR was 72.7%, 33.5%, 22.7%, and 20.8% versus 61.6%, 27.2%, 23.9%, and 17.9%, respectively (log-rank = 1.427, p = 0.23). LLR involved more use of the Pringle maneuver (15.5% vs. 30.2%, p = 0.025) and a shorter hospital stay (4 vs. 6 days, p < 0.001). There were no differences regarding surgical time, blood losses, transfusion, and mortality.

CONCLUSIONS

In selected patients with CRLM, LLR presents similar oncological outcomes with the advantages of the short-term results associated with LLR.

Highlights, limitations and future challenges of laparoscopic resection for colorectal liver metastases

The liver is the most common site for metastatic colorectal cancer (CRLM). Despite advances in oncologic treatment, resection of metastases is still the only curative option. Although laparoscopic surgery for primary colorectal cancer is well documented and widely used, laparoscopic surgery for liver metastases has developed more slowly. However, in spite of some difficulties, laparoscopic approach demonstrated strong advantages including minimal parietal damage, decreased morbidity (reduced blood loss and need for transfusion, fewer pulmonary complications), and simplification of subsequent iterative hepatectomy. Up to now, more than 9 000 laparoscopic procedures have been reported worldwide and long-term results in colorectal liver metastases seem comparable to the open approach. Only one recent randomized controlled trial has compared the laparoscopic and the open approach. The purpose of the present update was to identify the barriers limiting widespread acceptance of laparoscopic approach, the benefits and the limits of laparoscopic hepatectomies in CRLM.

A systematic review and meta-analysis comparing the short- and long-term outcomes for laparoscopic and open liver resections for liver metastases from colorectal cancer

BACKGROUND

The laparoscopic approach to liver resection has experienced exponential growth in recent years. However, evidence-based guidelines are needed for its safe future progression. The main aim of our study was to perform a systematic review and meta-analysis comparing the short- and long-term outcomes of laparoscopic and open liver resections for colorectal liver metastases (CRLM).

METHODS

To identify all the comparative manuscripts between laparoscopic and open liver resections for CRLM, all published English language studies with more than ten cases were screened. In addition to the primary meta-analysis, 3 specific subgroup analyses were performed on patients undergoing minor-only, major-only and synchronous resections. The quality of the studies was assessed using the Scottish Intercollegiate Guidelines Network (SIGN) methodology and Newcastle-Ottawa Score.

RESULTS

From the initial 194 manuscripts identified, 21 were meta-analysed, including results from the first randomized trial comparing open and laparoscopic resections of CRLM. Five of these were specific to patients undergoing a synchronous resection (399 cases), while six focused on minor (3 series including 226 cases) and major (3 series including 135 cases) resections, respectively. Thirteen manuscripts compared 2543 cases but could not be assigned to any of the above sub-analyses, so were analysed independently. The majority of short-term outcomes were favourable to the laparoscopic approach with equivalent rates of negative resection margins. No differences were observed between the approaches in overall or disease-free survival at 1, 3 or 5 years.

CONCLUSION

Laparoscopic liver resection for CRLM offers improved short-term outcomes with comparable long-term outcomes when compared to open approach.

Long term outcomes of simultaneous laparoscopic versus open resection for colorectal cancer with synchronous liver metastases

BACKGROUND/OBJECTIVE

Because of the advancements in the surgical techniques of liver resection and improvements in anesthesia and postoperative critical care, the simultaneous resection of synchronous colorectal cancer with liver metastasis either by the laparoscopic procedure or by the open resection method has been considered as a safe and acceptable option. However, there is limited information on the comparison of postoperative outcomes between laparoscopic surgery and open surgery. This study investigated the clinical results and postoperative outcomes of laparoscopic simultaneous resection of synchronous colorectal cancer with liver metastasis in comparison with those of open surgery.

METHODS

Patients with synchronous colorectal cancer and liver metastasis who underwent simultaneous resection at Shuang Ho Hospital from 2009 to 2017 were identified. The patient demographics, perioperative morbidity, and survival rates were analyzed.

RESULTS

A total of 38 patients underwent simultaneous resection of synchronous colorectal cancer with liver metastasis. Laparoscopic procedure was performed for 16 patients, and the remaining 22 patients underwent open surgery. No significant differences were observed in the patient characteristics between the two groups. There was no perioperative mortality in both groups. The 1- and 3-year disease-free survival rates were 56% and 35% in the laparoscopic group and 70% and 15% in the open surgery group, respectively. The 1- and 3-year overall survival rates were 100% and 84% in the laparoscopic group and 73% and 48% in the open surgery group, respectively.

CONCLUSION

In selected patients, laparoscopic surgery for simultaneous resection of synchronous colorectal cancer with liver metastasis seems to be safe and had a similar outcome to that of open surgery.

Meta-analysis of laparoscopic versus open liver resection for colorectal liver metastases

Background

To compare surgical and oncological outcomes of laparoscopic versus open liver resection for colorectal liver metastases.

Results

A total of 14 retrospective studies with 1679 colorectal liver metastases patients were analyzed: 683 patients treated with laparoscopic liver resection and 996 patients with open liver resection. With respect to surgical outcomes, laparoscopic compared with open liver resection was associated with lower blood loss (MD, -216.7, 95% CI, -309.4 to -124.1; P < 0.00001), less requiring blood transfusion (OR, 0.36; 95% CI, 0.23 to 0.55; P < 0.00001), lower postoperative complication morbidity (OR, 0.61; 95% CI, 0.47 to 0.80; P = 0.003), and shorter hospitalization time (MD, -3.85, 95% CI, -5.00 to -2.71; P < 0.00001). However, operation time and postoperative mortality were no significant difference between the two approaches. With respect to oncological outcomes, laparoscopic liver resection group was prone to lower recurrence rate (OR, 0.78; 95% CI, 0.61−0.99; P = 0.04), but surgical margins R0, overall survival and disease-free survival were no significant difference.

Materials and Methods

We performed a systematic search in MEDLINE, EMBASE, and CENTRAL for all relevant studies. All statistical analysis was performed using Review Manager version 5.3. Dichotomous data were calculated by odds ratio (OR) and continuous data were calculated by mean difference (MD) with 95% confidence intervals (CI).

Conclusions

Laparoscopic and open liver resection for colorectal liver metastases have the same effect on oncological outcomes, but laparoscopic liver resection achieves better surgical outcomes.

Laparoscopic liver resection for colorectal liver metastasis patients allows patients to start adjuvant chemotherapy without delay: a propensity score analysis

BACKGROUND

Although adjuvant chemotherapy (AC) is widely used after liver resection (LR) for colorectal liver metastasis (CRLM), surgical invasiveness may lead to delay in starting AC, which is preferably started within 8 weeks postoperative. We investigated whether laparoscopic liver resection (LLR) for CRLM facilitates AC start without delay.

METHODS

Between November 2014 and December 2016, 117 consecutive CRLM patients underwent LR followed by AC. LLR and OLR were performed in 30 and 87 patients, respectively. After propensity score matching on clinical characteristics, oncologic features, and type of resection, the time interval between liver resection and AC start was compared between LLR (n = 22) and OLR (n = 44) groups.

RESULTS

After propensity score matching, major LR was performed in 8/22 (36%) and 15/44 (34%) cases of LLR and OLR groups, respectively (P = 1.0). Clinical-pathological characteristic and intraoperative findings were comparable between two groups. There was no significant difference in postoperative complications between the two groups. The time interval between liver resection and AC start was significantly shorter in LLR than in OLR group (43 ± 10 versus 55 ± 18 days, P = 0.012). While 15/44 (34%) patients started AC after 8 weeks postoperative in OLR group, all patients in LLR group started AC within 8 weeks.

CONCLUSIONS

LLR for CRLM is associated with quicker return to AC when compared to OLR. The delivery of AC without delay allows CRLM patients to optimize the oncologic treatment sequence.

Laparoscopic versus open liver resection for colorectal liver metastases: a systematic review

BACKGROUND

Laparoscopic liver resection (LLR) has been proposed as a safe and feasible treatment option for colorectal liver metastasis (CRLM). However, the short-term and oncologic outcomes of LLR versus open liver resection (OLR) for CRLM have not been adequately assessed. Thus, we herein provide an updated systematic review comparing short-term and oncologic outcomes of CRLM patients undergoing LLR versus OLR.

METHODS

A systematic literature search was performed in the Pubmed, Embase, and Cochrane Library databases (until November 2, 2016) with a limitation to the publications in English. Quality assessment was performed based on the modification of the Newcastle-Ottawa Scale. Dichotomous data were calculated by odds ratio (OR), and continuous data were calculated by weighted mean difference (WMD) with 95% confidence intervals (CIs).

RESULTS

A total of 28 studies enrolling 4591 patients with CRLM were included. With respect to short-term outcomes, patients in LLR group showed significantly reduced blood loss (WMD: -143.64; 95% CI: -180.56 to -106.73; I2 = 86%; P < 0.001), lower operative transfusion requirement (OR: 0.40; 95% CI: 0.30-0.53; I2 = 0%; P < 0.001), shorter hospital stay (WMD: -2.47; 95% CI: -2.99 to -1.94; I2 = 82%; P < 0.001), reduced overall postoperative morbidity (OR: 0.53; 95% CI: 0.42-0.66; I2 = 38%; P < 0.001) and reduced severe morbidity (OR: 0.44; 95% CI: 0.32-0.60; I2 = 35%; P < 0.001). Regarding oncologic outcomes, there were no significant differences between the two surgical procedures in recurrence and 1-, 3-, and 5-overall survival and disease-free survival except for slightly higher R0 resection rate in LLR group was slightly higher than that of OLR group (OR: 1.43; 95% CI: 1.03-1.97; I2 = 37%; P = 0.03).

CONCLUSIONS

LLR should be the standard approach for selected patients with CRLM, and further research should focus on determining which patients would benefit most from LLR.

Laparoscopic liver resection in metastatic colorectal cancer treatment: comparison with long-term results using the conventional approach

Background

Laparoscopic liver resections (LLRs) have been shown to be both feasible and safe. However, no randomised control studies have been performed to date comparing results with those of the open surgery approach.

Main aim

To analyse LLR long-term results and compare them with a similar group of open resections in patients with colorectal carcinoma liver metastasis (CRCLM).

Methods

Retrospective study on a prospective database. All patients with anatomopathological diagnosis of CRCLM resected between July 2007 and July 2015.

Results

Twenty-two open resections and 18 laparoscopic resections which presented favourable lesions for laparoscopic approach were analysed. Postoperative grade III morbidity was similar in both groups (p = 0.323). Disease-free survival at 1, 3, and 8 years in the laparoscopy group (n =16) was 81%, 58%, and 58%, respectively, while in the open surgery group (n = 17) it was 64%, 37%, and 19% respectively; no differences were found (p = 0.388). Global survival in the laparoscopy group was 93%, 60%, and 40%, respectively, and 88%, 74.5%, and 58.7%, respectively, in the open surgery group; no differences were found (p = 0.893) with a 37 months average follow-up.

Conclusion

LLR in patients with technically favourable CRCLM had similar morbidity to open resections and resection margins were not compromised because of laparoscopy.

Effectiveness and safety of robotic-assisted versus laparoscopic hepatectomy for liver neoplasms: A meta-analysis of retrospective studies

This meta-analysis aimed to investigate the effectiveness and safety of RAH and LLR for liver neoplasms. A systematic search was performed in PubMed, EMbase, the Cochrane Library, Web of science, and China Biology Medicine disc up to July 2016 for studies that provided comparisons between the surgical outcomes of RAH and LLR for liver neoplasms. WMD, OR and 95% CI were calculated and data combined using the random-effect model. The quality of the evidence was assessed using GRADE methods. A total of 17 studies were included in the meta-analysis, in which 487 patients were in the RAH group and 902 patients were in the LLR group. The meta-analysis results indicated: compared to LLR, RAH was associated with more estimated blood loss, longer operative time, and longer time to first nutritional intake (p < 0.05). There was no significant difference in length of hospital stay, conversion rate during operation, R0 resection rate, complications and mortality (p > 0.05). Three studies reported the total cost, and the result showed a higher cost in the RAH group when compared with the LLR group (p < 0.05). This meta-analysis indicated that RAH and LLR display similar effectiveness and safety in hepatectomy. Considering the lack of high quality original studies, prospective clinical trials should be conducted to provide strong evidence for clinical guidelines formation, and the insurance coverage policies should be established to promote the application of robotic surgery in the future.

Laparoscopic versus open 1-stage resection of synchronous liver metastases and primary colorectal cancer

BACKGROUND

The aim of this study is to compare the perioperative and oncologic outcomes of open and laparoscopic approaches for concomitant resection of synchronous colorectal cancer and liver metastases.

METHODS

Between 2006 and 2015, all patients undergoing combined resection of primary colorectal cancer and liver metastases were included in the study (n=43). Laparoscopic and open groups were compared regarding clinical, perioperative and oncologic outcomes.

RESULTS

There were 29 patients in the open group and 14 patients in the laparoscopic group. The groups were similar regarding demographics, comorbidities, histopathological characteristics of the primary tumor and liver metastases. Postoperative complication rate (44.8% vs. 7.1%, P=0.016) was higher, and hospital stay (10 vs. 6.4 days, P=0.001) longer in the open compared to the laparoscopic group. Overall survival (OS) was comparable between the groups (P=0.10); whereas, disease-free survival (DFS) was longer in laparoscopic group (P=0.02).

CONCLUSIONS

According to the results, in patients, whose primary colorectal cancer and metastatic liver disease was amenable to a minimally invasive resection, a concomitant laparoscopic approach resulted in less morbidity without compromising oncologic outcomes. This suggests that a laparoscopic approach may be considered in appropriate patients by surgeons with experience in both advanced laparoscopic liver and colorectal techniques.

Laparoscopic Versus Open Liver Resection for Colorectal Liver Metastases: A Comprehensive Systematic Review and Meta-analysis

The effects of laparoscopic liver resection (LLR) and open liver resection (OLR) on oncological outcomes for colorectal cancer liver metastases (CCLM) remain inconclusive. Major databases were searched from January 1992 to October 2016. Effects of LLR vs OLR were determined. The primary endpoints were oncological outcomes. In total, 32 eligible non-randomized studies with 4697 patients (LLR: 1809, OLR: 2888) were analyzed. There were higher rates of clear surgical margins (OR: 1.64, 95%CI: 1.32 to 2.05, p < 0.00001) in the LLR group, without significant differences in disease recurrence, 3- or 5-year overall survival(OS) and disease free survival(DFS) between the two approaches. LLR was associated with less intraoperative blood loss (WMD: −147.46 [−195.78 to −99.15] mL, P < 0.00001) and fewer blood transfusions (OR: 0.41 [0.30–0.58], P < 0.00001), but with longer operation time (WMD:14.44 [1.01 to 27.88] min, P < 0.00001) compared to OLR. Less overall morbidity (OR: 0.64 [0.55 to 0.75], p < 0.00001) and shorter postoperative hospital stay (WMD: −2.36 [−3.06 to −1.66] d, p < 0.00001) were observed for patients undergoing LLR, while there was no statistical difference in mortality. LLR appears to be a safe and feasible alternative to OLR in the treatment of CCLM in selected patients.

Long-sleeve-working-port assisted laparoscopic pancreaticoduodenectomy-A new technique in laparoscopic surgery

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The new technique of using a long-sleeve-working-port in laparoscopic surgery can facilitate complicated operations like laparoscopic pancreaticoduodenectomy.

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This technique offers both advantages of minimally invasive surgery and the use of ordinary instruments for open surgery through the working port.

•

This working port is cheap and easy to use.

Introduction

Advances in technology and instruments have made laparoscopic pancreaticoduodenectomy (LPD) feasible. Unfortunately, this operation is technically very challenging and it is not widely accepted by laparoscopic surgeons.

Presentation of case

A 59-year-old woman underwent LPD using a newly invented long-sleeve-working-port (LSWP) for a mucinous cystadenoma of the head of pancreas. This case report describes this port and its use on this patient.

Discussion

LSWP is a new invention to facilitate difficult laparoscopic operations. Through this LSWP, ordinary instruments used in open surgery can be used to overcome the limitation encountered in conventional laparoscopic surgery.

Conculsion

LSWP made complex laparoscopic surgery less complex.

Short and long-term outcomes of laparoscopic compared to open liver resection for colorectal liver metastases

BACKGROUND

Minimally invasive surgery (MIS) is now established as standard of care for a variety of gastrointestinal procedures for benign and malignant indications. However, due to concerns regarding superiority to open liver resection (OLR), the uptake of laparoscopic liver resection (LLR) has been slow. Data on long-term outcomes of LLR for colorectal liver metastases (CRLM) remain limited. We conducted a systematic review and meta-analysis of short and long-term outcomes of LLR compared to OLR for CRLM.

METHODS

Five electronic databases were systematically searched for studies comparing LLR and OLR for CRLM and reporting on survival outcomes. Two reviewers independently selected studies and extracted data. Primary outcomes were overall survival (OS) and recurrence free survival (RFS). Secondary outcomes were operative time, estimated blood loss, post-operative major morbidity, mortality, length of stay (LOS), and resection margins.

RESULTS

Eight non-randomized studies (NRS) were included (n=2,017 total patients). Six were matched cohort studies. LLR reduced estimated blood loss [mean difference: -108.9; 95% confidence interval (CI), -214.0 to -3.7) and major morbidity [relative risk (RR): 0.68; 95% CI, 0.56-0.83], but not mortality. No difference was observed in operative time, LOS, resection margins, R0 resections, and recurrence. Survival data could not be pooled. No studies reported inferior survival with LLR. OS varied from 36% to 60% for LLR and 37% to 65% for OLR. RFS ranged from 14% to 30% for LLR and 22% to 38% for OLR. According to the grade classification, the strength of evidence was low to very low for all outcomes. The use of parenchymal sparing resections with LLR and OLR could not be assessed.

CONCLUSIONS

Based on limited retrospective evidence, LLR offers reduced morbidity and blood loss compared to OLR for CRLM. Comparable oncologic outcomes can be achieved. Although LLR cannot be considered as standard of care for CRLM, it is beneficial for well-selected patients and lesions. Therefore, LLR should be part of the liver surgeon's armamentarium.

Comparative Short-term Benefits of Laparoscopic Liver Resection: 9000 Cases and Climbing

OBJECTIVE

To perform a systematic review of worldwide literature on laparoscopic liver resections (LLR) and compare short-term outcomes against open liver resections (OLR) by meta-analyses.

SUMMARY BACKGROUND DATA

There are no updated pooled data since 2009 about the current status and short-term outcomes of LLR worldwide.

PATIENTS AND METHODS

All English language publications on LLR were screened. Descriptive worldwide data and short-term outcomes were obtained. Separate analyses were performed for minor-only and major-only resection series, and series in which minor/major resections were not differentiated. Apparent case duplications were excluded.

RESULTS

A set of 463 published manuscripts were reviewed. One hundred seventy-nine single-center series were identified that accounted for 9527 LLR cases worldwide. Minor-only, major-only, and combined major-minor series were 61, 18, and 100, respectively, including 32, 8, and 43 comparative series, respectively. Of the total 9527 LLR cases reported, 6190 (65%) were for malignancy and 3337 (35%) were for benign indications. There were 37 deaths reported (mortality rate = 0.4%). From the meta-analysis comparing case-matched LLR to OLR (N = 2900 cases), there was no increased mortality and significantly less complications, transfusions, blood loss, and hospital stay observed in LLR vs OLR.

CONCLUSIONS

This is the largest review of LLR available to date with over 9000 cases published. It confirms growing safety when performed in selected patients and by trained surgeons, and suggests that LLR may offer improved patient short-term outcomes compared with OLR. Improved levels of evidence, standardized reporting of outcomes, and assuring proper training are the next challenges of laparoscopic liver surgery.

Clinical Utility of the Difficulty Scoring System for Predicting Surgical Time of Laparoscopic Liver Resection

INTRODUCTION

Laparoscopic liver resection (LLR) has several problems, such as technical complexity and patient and tumor factors. A difficulty scoring system to preoperatively evaluate the difficulty of LLR was established at the second International Consensus Conference on Laparoscopic Liver Resection. The aim of this study was to explore the clinical usefulness of the difficulty scoring system for LLR.

PATIENTS AND METHODS

From January 2010 to June 2015, the records of 78 patients who had undergone LLR were retrospectively reviewed. The patients' data were used to assign a difficulty score, and the correlations between scores and surgical outcomes were investigated.

RESULTS

The mean surgical time was 256 minutes, and the mean blood loss was 168 mL. The difficulty score significantly correlated with surgical time and blood loss, but not with morbidity and postoperative hospital stay. Multivariate analysis showed that the difficulty score was an independent predictor of prolonged surgical time.

CONCLUSIONS

The difficulty score was found to be an effective predictor of surgical time for LLR.

Surgical Outcomes of Laparoscopic Liver Resection in Elderly Patients: A Comparative Study From a Single Center

The life expectancy continues to gradually increase worldwide. Laparoscopic liver resection (LLR) was recently reported to be a relatively safe procedure for treatment of liver disease because of the development of new techniques and instruments. The aim of this study was to evaluate the surgical outcomes of elderly patients who underwent LLR. Of these 61 patients who underwent LLR in our institute from January 2010 through April 2014, 21 were aged 75 years and above (group E), and 40 were aged below 75 years (group NE). Patient characteristics were retrospectively analyzed between the 2 groups. The results showed that patient characteristics were similar between the 2 groups, although the incidence of hypertension was significantly greater among patients in group E. There were no significant differences in the incidence of postoperative complications or length of hospital stay between the 2 groups. In conclusion, LLR for elderly patients was a feasible procedure compared with nonelderly patients.

Role of laparoscopy in hepatobiliary malignancies

The many benefits of laparoscopy, including smaller incision, reduced length of hospital stay and more rapid return to normal function, have seen its popularity grow in recent years. With concurrent improvements in non-surgical cancer management the importance of accurate staging is becoming increasingly important. There are two main applications of laparoscopic surgery in managing hepato-pancreatico-biliary (HPB) malignancy: accurate staging of disease and resection. We aim to summarize the use of laparoscopy in these contexts. The role of staging laparoscopy has become routine in certain cancers, in particular T[2] staged, locally advanced gastric cancer, hilar cholangiocarcinoma and non-Hodgkin's lymphoma. For other cancers, in particular colorectal, laparoscopy has now become the gold standard management for resection such that there is no role for stand-alone staging laparoscopy. In HPB cancers, although staging laparoscopy may play a role, with ever improving radiology, its role remains controversial.

Benefit of laparoscopic liver resection in high body mass index patients

AIM: To explore the impact of body mass index (BMI) on surgical outcomes in patients undergoing laparoscopic liver resection (LLR).

METHODS: From January 2010 to February 2015, sixty-eight patients who underwent primary partial liver resection in our institute were retrospectively reviewed. Surgical outcomes of LLR were compared with those of open liver resection (OLR). In addition, we analyzed associations with BMI and surgical outcomes.

RESULTS: Among 68 patients, thirty-nine patients underwent LLR and 29 were performed OLR. Significant difference in operation time, blood loss, and postoperative hospital stay was observed. There were no significant differences in mortality and morbidity in two groups. Twenty-two patients (32.4%) were classified as obese (BMI ≥ 25). A statistically significant correlation was observed between BMI and operation time, between BMI and blood loss in OLR, but not in LLR. The operation time and blood loss of OLR were significantly higher than that of LLR in obese patients. Open liver resection and BMI were independent predictors for prolonged operation time and increased blood loss in multivariate analysis.

CONCLUSION: The present study demonstrated that BMI had influenced to surgical outcomes of OLR. LLR was less influenced by BMI and had great benefit in obese patients.

Early and Long-term Oncological Outcomes After Laparoscopic Resection for Colorectal Liver Metastases: A Propensity Score-based Analysis

OBJECTIVE

To compare early and long-term outcomes in patients undergoing resection for colorectal liver metastases (CLM) by either a laparoscopic (LA) or an open (OA) approach.

BACKGROUND

The LA is still a matter of debate regarding the surgical management of CLM.

METHODS

Data of all patients from 32 French surgical centers who underwent liver resection for CLM from January 2006 to December 2013 were collected. Aiming to obtain 2 well-balanced cohorts for available variables influencing early outcome and survival, the LA group was matched 1:1 with the OA group by using a propensity score (PS)-based method.

RESULTS

The unmatched initial cohort consisted of 2620 patients (LA: 176, OA: 2444). In the matched cohort for operative risk factors (LA: 153, OA: 153), the LA group had shorter hospitalization stays [11.1 (±9) days vs 13.9 (±10) days; P = 0.01] and was associated with lower rates of grade III to V complications [odds ratio (OR): 0.27, 95% confidence interval (CI) 0.14-0.51; P = 0.0002] and inhospital transfusions (OR: 0.33 95% CI 0.18-0.59; P < 0.0001). On a prognostic factors well-balanced population (LA: 73, OA: 73), the LA group and the OA group experienced similar overall (OS) and disease-free (DFS) survival rates [OS rates of 88% and 78% vs 84% and 75% at 3 and 5 years, respectively (P = 0.72) and DFS rates of 40% and 32% vs 52% and 36% at 3 and 5 years, respectively (P = 0.60)].

CONCLUSIONS

In the patients who are suitable for LA, laparoscopy yields better operative outcomes without impairing long-term survival.

Laparoscopic and robot-assisted laparoscopic digestive surgery: Present and future directions

Laparoscopic surgery is applied today worldwide to most digestive procedures. In some of them, such as cholecystectomy, Nissen's fundoplication or obesity surgery, laparoscopy has become the standard in practice. In others, such as colon or gastric resection, the laparoscopic approach is frequently used and its usefulness is unquestionable. More complex procedures, such as esophageal, liver or pancreatic resections are, however, more infrequently performed, due to the high grade of skill necessary. As a result, there is less clinical evidence to support its implementation. In the recent years, robot-assisted laparoscopic surgery has been increasingly applied, again with little evidence for comparison with the conventional laparoscopic approach. This review will focus on the complex digestive procedures as well as those whose use in standard practice could be more controversial. Also novel robot-assisted procedures will be updated.

Laparoscopic Parenchymal-Sparing Resections for Nonperipheral Liver Lesions, the Diamond Technique: Technical Aspects, Clinical Outcomes, and Oncologic Efficiency

BACKGROUND

Surgical management of liver lesions has moved toward "parenchymal-sparing" strategies. Although open parenchymal-sparing liver resections are supported by encouraging results, the applicability of the laparoscopic approach for nonperipheral tumors is still questionable. Our aim was to assess the feasibility, safety, and oncologic adequacy of laparoscopic parenchymal-sparing liver resection for nonperipheral lesions with a description of the technique adopted in this setting.

STUDY DESIGN

A prospectively collected single-center database of 517 laparoscopic liver resections was reviewed. Laparoscopic nonperipheral parenchymal-sparing liver resections (LapPSLRs), that is, entirely intraparenchymal limited resections performed on nonperipheral lesions, were selected. Intra- and perioperative outcomes were analyzed along with 3-year actuarial survival for patients with colorectal liver metastases.

RESULTS

The group comprised 49 LapPSLRs. Colorectal liver metastases were the most frequent diagnosis (n = 24 patients). Lesions were located in segments 8, 7, 4a, and 3 in 51%, 8.2%, 36.7%, and 4.1% of cases, respectively. Conversion occurred in 4 patients (8%). Intra- and postoperative short-term outcomes were calculated for the 24 isolated LapPSLR (not associated with any concurrent liver resection). Median operative time and blood loss were 215 minutes and 225 mL, respectively. Pringle maneuver was used in 75% of cases. Postoperative 90-day mortality was nil and morbidity rate was 12.5%. Median postoperative stay was 3 days. Median tumor-free margin was 4 mm and 100% R0 rate was achieved for all LapPSLRs with curative intent. Three-year overall, recurrence-free, and disease-free survival rates were 100%, 65.2%, and 69.6%, respectively.

CONCLUSIONS

Laparoscopic parenchymal-sparing liver resections for nonperipheral liver lesions are feasible and can be performed safely without compromising perioperative and oncological outcomes.

A systematic review of robotic-assisted liver resection and meta-analysis of robotic versus laparoscopic hepatectomy for hepatic neoplasms

BACKGROUND

Robotic-assisted liver resection (RALR) was introduced as procedures of overcoming the limitations of traditional laparoscopic liver resection (LLR). The aim of this review was to evaluate the surgical results of RALR from all published studies and the results of comparative studies of RALR versus LLR for hepatic neoplasm.

METHODS

Eligible studies involved RALR that published between January 2001 and December 2014 were reviewed systematically. Comparisons between RALS and LLR were pooled and analyzed by meta-analytical techniques using random- or fixed-effects models, as appropriate.

RESULTS

In total, 29 studies, involving 537 patients undergoing RALR, were identified. The most common RALR procedure was a wedge resection and segmentectomy (28.67%), followed by right hepatectomy (17.88%), left lateral sectionectomy (13.22%), and bisegmentectomy (9.12%). The conversion and complication rates were 5.59 and 11.36%, respectively. The most common reasons for conversion were bleeding (46.67%) and unclear tumor margin (33.33%). Intracavitary fluid collections and bile leaks (40.98%) were the most frequently occurring morbidities. Nine studies, involving 774 patients, were included in meta-analysis. RALR had a longer operative time compared with LLR [mean difference (MD) 48.49; 95% confidence interval (CI) 22.49-74.49 min; p = 0.0003]. There were no significant differences between the two groups in blood loss [MD 31.53; 95% CI -14.74 to 77.79 mL; p = 0.18], hospital stay [MD 0.13; 95% CI -0.54 to 0.80 days; p = 0.18], postoperative overall morbidity [odds ratio (OR) 0.76; 95% CI 0.49-1.19; p = 0.23], and surgical margin status (OR 0.61; 95% CI 0.33-1.12; p = 0.11); cost was greater than robotic surgery (p = 0.001).

CONCLUSION

RALR and LLR display similar safety, feasibility, and effectiveness for hepatectomies, but further studies are needed before any final conclusion can be drawn, especially in terms of oncologic and cost-effectiveness outcomes.

Cost–utility analysis of operative versus non-operative treatment for colorectal liver metastases

Background

Surgical resection of colorectal liver metastases (CRLMs) is the standard of care when possible, although this strategy has not been compared with non-operative interventions in controlled trials. Although survival outcomes are clear, the cost-effectiveness of surgery is not. This study aimed to estimate the cost-effectiveness of resection for CRLMs compared with non-operative treatment (palliative care including chemotherapy).

Methods

Operative and non-operative cohorts were identified from a prospectively maintained database. Patients in the operative cohort had a minimum of 10 years of follow-up. A model-based cost–utility analysis was conducted to quantify the mean cost and quality-adjusted life-years (QALYs) over a lifetime time horizon. The analysis was conducted from a healthcare provider perspective (UK National Health Service) in a secondary care (hospital) setting.

Results

Median survival was 41 and 21 months in the operative and non-operative cohorts respectively (P &lt; 0·001). The operative strategy dominated non-operative treatments, being less costly (€22 200 versus €32 800) and more effective (4·017 versus 1·111 QALYs gained). The results of extensive sensitivity analysis showed that the operative strategy dominated non-operative treatment in every scenario.

Conclusion

Operative treatment of CRLMs yields greater survival than non-operative treatment, and is both more effective and less costly.

Multiple hepatic sclerosing hemangioma mimicking metastatic liver tumor successfully treated by laparoscopic surgery: Report of a case

•

Sclerosing hemangioma should be included among the differential diagnoses of multiple liver tumors in patients with colorectal cancer.

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Laparoscopic hepatectomy is useful for diagnostic therapy for undiagnosed multiple liver tumors.

•

This report is the first to describe multiple hepatic sclerosing hemangiomas treated by laparoscopic surgery.

Introduction

Hepatic sclerosing hemangioma is a very rare benign tumor, characterized by fibrosis and hyalinization occurring in association with degeneration of a hepatic cavernous hemangioma. We report here a rare case of multiple hepatic sclerosing hemangioma mimicking metastatic liver tumor that was successfully treated using laparoscopic surgery.

Presentation of case

A 67-year-old woman with multiple liver tumors underwent single-incision laparoscopic sigmoidectomy under a diagnosis of advanced sigmoid cancer with multiple liver metastases. Examination of surgical specimens of sigmoid colon revealed moderately differentiated adenocarcinoma invading the serosa, and no lymph node metastases. Serum levels of carcinoembryonic antigen and carbohydrate antigen 19-9 remained within normal limits throughout the course. Two months after sigmoidectomy, the patient underwent laparoscopic partial hepatectomy of S1 and S6 of the liver and cholecystectomy. Histopathological examination showed that the tumors mainly comprised hyalinized tissue and collagen fibers with sporadic vascular spaces on hematoxylin and eosin-stained sections, yielding a diagnosis of multiple hepatic sclerosing hemangioma. No evidence of recurrence has been seen as of 21 months postoperatively.

Discussion

Differentiating multiple sclerosing hemangiomas from metastatic liver tumors was quite difficult because the radiological findings were closely compatible with liver metastases. Laroscopic hepatectomy provided less blood loss, a shorter duration of hospitalization, and good cosmetic results.

Conclusion

Sclerosing hemangioma should be included among the differential diagnoses of multiple liver tumors in patients with colorectal cancer. Laparoscopic hepatectomy is useful for diagnostic therapy for undiagnosed multiple liver tumors.

Short- and long-term outcomes of laparoscopic versus open hepatectomy for small malignant liver tumors: a single-center experience

BACKGROUND

Laparoscopic hepatectomy (Lap-Hx) has been increasingly performed for patients with liver tumors as surgical techniques and devices have progressed. However, the long-term outcomes of Lap-Hx for malignant liver tumors are not oncologically guaranteed. This study compared the short- and long-term outcomes between Lap-Hx and open hepatectomy (Open-Hx) for malignant liver tumors by matched-pair analysis.

METHODS

The indications for Lap-Hx at our department are a tumor size of <5 cm and fewer than two lesions without macroscopic vascular invasion or the need for biliary reconstruction. In total, 135 patients underwent Lap-Hx for malignant liver tumors through December 2013. We compared the short- and long-term outcomes between Lap-Hx and Open-Hx in patients who met the above-mentioned indications.

RESULTS

With respect to short-term outcomes, the operation time, blood loss, postoperative hospital stay, white blood cell count, and C-reactive protein level after Lap-Hx were significantly better than those after Open-Hx in both the patients who underwent partial resection and those who underwent lateral sectionectomy. In patients who underwent partial resection, the incidence of postoperative complications after Lap-Hx was significantly lower than that after Open-Hx; in particular, wound infection and respiratory complications were significantly lower. Furthermore, when the tumor was located in the posterosuperior segments, the operation time for Lap-Hx was not shorter than that for Open-Hx. With respect to long-term outcomes of hepatocellular carcinoma, neither overall nor disease-free survival differed between the two groups. With respect to long-term outcomes of colorectal liver metastases, the disease-free survival rate was similar between Lap-Hx and Open-Hx; however, the overall survival rate was significantly better for Lap-Hx than for Open-Hx.

CONCLUSIONS

Lap-Hx is a good option for selected patients with malignant liver tumors. The short- and long-term outcomes of Lap-Hx also are considered to be acceptable.

Laparoscopic versus open hepatectomy with or without synchronous colectomy for colorectal liver metastasis: a meta-analysis

Background

To compare short-term and long-term results of colorectal patients undergoing laparoscopic and open hepatectomy. Moreover, outcomes of laparoscopic versus open procedures for simultaneous primary colorectal tumor and liver metastasis resection were compared.

Methods

A systematic search was conducted in the PubMed and EmBase databases (until Oct. 22. 2013) with no limits. Bibliographic citation management software (EndNote X6) was used for extracted literature management. Quality assessment was performed according to a modification of the Newcastle-Ottawa Scale. The data were analyzed using Review Manager (Version 5.1), and sensitivity analysis was performed by sequentially omitting each study.

Results

Finally, 14 studies, including a total of 975 CLM (colorectal liver metastasis) patients, compared laparoscopic with open hepatectomy. 3 studies of them, including a total of 107 CLM patients, compared laparoscopic with open procedures for synchronous hepatectomy and colectomy. Laparoscopic hepatectomy was associated with a significantly less blood loss, shorter hospitalization time, and less operative transfusion rate. In addition, lower hospital morbidity rate (OR = 0.57, 95%CI:0.42–0.78, P = 0.0005) and better R0 resection (OR = 2.44, 95%CI:1.21–4.94, P = 0.01) were observed in laparoscopic hepatectomy. For long-term outcomes, there were no significant differences between two surgical procedures on recurrence and overall survival. In comparison of synchronous hepatectomy and colectomy, laparoscopic procedure displayed shorter hospitalization (MD = −3.40, 95%CI:−4.37–2.44, P<0.00001) than open procedure. Other outcomes, including surgical time, estimated blood loss, hospital morbidity, and overall survival did not differ significantly in the comparison.

Conclusions

Laparoscopic hepatectomy with or without synchronous colectomy are acceptable for selective CLM patients. We suggest standard inclusion criteria of CLM patients be formulated.