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Currently, the impact of body mass index (BMI) on the outcomes of laparoscopic liver resections (LLR) is poorly defined. This study attempts to evaluate the impact of BMI on the peri-operative outcomes following laparoscopic left lateral sectionectomy (L-LLS). A retrospective analysis of 2183 patients who underwent pure L-LLS at 59 international centers between 2004 and 2021 was performed. Associations between BMI and selected peri-operative outcomes were analyzed using restricted cubic splines. A BMI of >27kg/m2 was associated with increased in blood loss (Mean difference (MD) 21 mls, 95% CI 5–36), open conversions (Relative risk (RR) 1.13, 95% CI 1.03–1.25), operative time (MD 11 min, 95% CI 6–16), use of Pringles maneuver (RR 1.15, 95% CI 1.06–1.26) and reductions in length of stay (MD -0.2 days, 95% CI -0.3 to −0.1). The magnitude of these differences increased with each unit increase in BMI. However, there was a "U" shaped association between BMI and morbidity with the highest complication rates observed in underweight and obese patients. Increasing BMI resulted in increasing difficulty of L-LLS. Consideration should be given to its incorporation in future difficulty scoring systems in laparoscopic liver resections. [ABSTRACT FROM AUTHOR]

Most surgeons perform laparoscopic left lateral sectionectomy (Lap LLS) using the caudo-peripheral approach (C-P approach). However, recently, a cranio-dorsal approach (C-D approach) has been applied to various types of hepatectomy owing to its advantage of preventing split injury. No studies yet have compared the perioperative outcomes of Lap LLS using each approach. Therefore, this study aimed to determine whether the C-D approach is useful for Lap LLS by comparing its perioperative outcomes with the C-P approach. Data of patients who underwent Lap LLS in our institution between 2010 and 2022 for liver tumors were retrospectively collected. We compared the perioperative outcomes of Lap LLS using a conventional C-P approach, which transects hepatic parenchyma in the caudo-peripheral direction and a C-D approach, which transects hepatic parenchyma in the cranio-caudal direction. All surgeries were performed only by board-certified expert surgeons to minimize technical bias. Furthermore, the perioperative procedures employed at our institution remained unchanged throughout the study period. A total of 36 patients were included in the study (C-P approach, n = 25; C-D approach, n = 11). The C-D approach showed a significantly shorter operation time than the C-P approach (median, 225 min vs. 262 min, p = 0.04). In addition, the C-D approach showed significantly lower blood loss than the C-P approach (median, 20 mL vs. 100 mL, p < 0.01). Other parameters, such as morbidity and hospital stay, were comparable between groups. The C-D approach could offer better surgical outcomes than the conventional C-P approach. [ABSTRACT FROM AUTHOR]

Background: Left lateral sectionectomy (LLS) is one of the most commonly performed minimally invasive liver resections. While laparoscopic (L)-LLS is a well-established technique, over traditional open resection, it remains controversial if robotic (R)-LLS provides any advantages of L-LLS. Methods: A post hoc analysis of 997 patients from 21 international centres undergoing L-LLS or R-LLS from 2006 to 2020 was conducted. A total of 886 cases (214 R-LLS, 672 L-LLS) met study criteria. 1:1 and 1:2 propensity score matched (PSM) comparison was performed between R-LLS & L-LLS. Further subset analysis by Iwate difficulty was also performed. Outcomes measured include operating time, blood loss, open conversion, readmission rates, morbidity and mortality. Results: Comparison between R-LLS and L-LLS after PSM 1:2 demonstrated statistically significantly lower open conversion rate in R-LLS than L-LLS (0.6% versus 5%, p = 0.009) and median blood loss was also statistically significantly lower in R-LLS at 50 (80) versus 100 (170) in L-LLS (p = 0.011) after PSM 1:1 although there was no difference in the blood transfusion rate. Pringle manoeuvre was also found to be used more frequently in R-LLS, with 53(24.8%) cases versus to 84(12.5%) L-LLS cases (p < 0.001). There was no significant difference in the other key perioperative outcomes such as operating time, length of stay, postoperative morbidity, major morbidity and 90-day mortality between both groups. Conclusion: R-LLS was associated with similar key perioperative outcomes compared to L-LLS. It was also associated with significantly lower blood loss and open conversion rates compared to L-LLS. [ABSTRACT FROM AUTHOR]

Background: Tumor size (TS) represents a critical parameter in the risk assessment of laparoscopic liver resections (LLR). Moreover, TS has been rarely related to the extent of liver resection. The aim of this study was to study the relationship between tumor size and difficulty of laparoscopic left lateral sectionectomy (L‐LLS). Methods: The impact of TS cutoffs was investigated by stratifying tumor size at each 10 mm‐interval. The optimal cutoffs were chosen taking into consideration the number of endpoints which show a statistically significant split around the cut‐points of interest and the magnitude of relative risk after correction for multiple risk factors. Results: A total of 1910 L‐LLS were included. Overall, open conversion and intraoperative blood transfusion were 3.1 and 3.3%, respectively. The major morbidity rate was 2.7% and 90‐days mortality 0.6%. Three optimal TS cutoffs were identified: 40‐, 70‐, and 100‐mm. All the selected cutoffs showed a significant discriminative power for the prediction of open conversion, operative time, blood transfusion and need of Pringle maneuver. Moreover, 70‐ and 100‐mm cutoffs were both discriminative for estimated blood loss and major complications. A stepwise increase in rates of open conversion rate (Z = 3.90, P <.001), operative time (Z = 3.84, P <.001), blood loss (Z = 6.50, P <.001), intraoperative blood transfusion rate (Z = 5.15, P <.001), Pringle maneuver use (Z = 6.48, P <.001), major morbidity(Z = 2.17, P =.030) and 30‐days readmission (Z = 1.99, P =.047) was registered as the size increased. Conclusion: L‐LLS for tumors of increasing size was associated with poorer intraoperative and early postoperative outcomes suggesting increasing difficulty of the procedure. We determined three optimal TS cutoffs (40‐, 70‐ and 100‐mm) to accurately stratify surgical difficulty after L‐LLS. [ABSTRACT FROM AUTHOR]

Objective: The da Vinci SP® surgical system offers improvements and refinements for the robotic single-site procedures. Here, we report the first case performing the single-port robotic-assisted left lateral sectionectomy (LLS) for hepatic tumor using the da Vinci SP® surgical system, and demonstrate the safety and technical feasibility of this platform. Methods: A 69-year-old female patient with hepatic tumor underwent single-port robotic-assisted LLS using the da Vinci SP® system at the Chinese People's Liberation Army (PLA) General Hospital on December 27, 2021. And the clinical data, preoperative preparations, surgical procedures, and postoperative recovery of this patients were summarized. Results: The patient with hepatic tumor underwent successful single-port robotic-assisted LLS. The intraperitoneal operation time was 49 minutes and the estimated blood loss was 10 ml. No significant intraoperative complications were observed. The Visual Analogue Scale (VAS) pain intensity score was 3/10 in the immediate postoperative period and 1/10 on postoperative day one. The patient was discharged on postoperative day four. Conclusion: Herein, we report the first case of single-port robotic-assisted LLS for hepatic tumor using da Vinci SP® system, and this operation is technically safe and feasible. The present case indicated that the single-port robotic-assisted surgery is expected to further improve the application prospect of single-port surgery.

Laparoscopic left lateral sectionectomy (LLLS) is considered a standard approach for patients. Textbook outcomes (TOs) with benchmark values have been developed to help centers assess their outcomes of LLLS. The aim of our study was to identify factors associated with achieving TOs after LLLS. This is a retrospective cohort study including 195 patients undergoing LLLS between January 2004 and December 2018. Our outcomes were compared to benchmark values and graded as similar, better, or worse. A TO was achieved in 106 patients (54.4%). The main determinant for achieving a TO was prolonged hospital stay. Year of surgery [P = 0.002; odds ratio (OR) 3.913, 95% confidence interval (CI) 1.666–9.188], American Society of Anesthesiologists (ASA) score (P = 0.015; OR 0.104, 95% CI 0.017–0.650), body mass index (BMI) score (P = 0.075; OR 1.135, 95% CI 0.988–1.304), inflow clamping > 40 min (P = 0.037; OR 0.090, 95% CI 0.009–0.867) and operation time (P = 0.002; OR 0.991, 95% CI 0.985–0.997) were the factors associated with achieving a TO. Our outcomes were similar to the benchmark values for all criteria, except for the transfusion rate (our study vs benchmark values; 6.2% vs 3.8%), which was worse in our patients. We achieved better outcomes with a lower conversion rate (4.6% vs 7.2%), fewer patients requiring massive transfusion (4.1% vs 8.3%), lower rate of prolonged inflow clamping (3.9% vs 6.3%), lower overall complication rate (11.9% vs 19.8%), lower reoperation rate (0% vs 3.4%), and fewer patients with a positive margin (1.5% vs 10.8%). Year of surgery, ASA score, inflow clamping > 40 min and operation time were independently associated with failure to achieve a TO. TOs are useful tools to measure the surgical outcomes and compare surgical performance with benchmark values. TOs also offer a new method to retrospectively compare outcomes. [ABSTRACT FROM AUTHOR]

Background: Laparoscopy was considered the standard method of left lateral sectionectomy. The robotic approach showed advantages in complex cases of left lateral sectionectomy. However, the impact of the robotic system on ordinary cases is still unknown. Methods: Retrospective review of consecutive robotic left lateral sectionectomy (R-LLS) and laparoscopic left lateral sectionectomy (L-LLS) from January 2015 to December 2019. Univariate and multivariate logistic regression was used to determine the effects of surgical method and surgical complexity on postoperative length of stay, surgical and overall cost. Results: 258 consecutive patients who underwent minimally invasive left lateral sectionectomy were analyzed. L-LLS had comparable outcomes and decreased surgery (USD 2416.3 vs 4624.5; p < 0.001) and overall costs (USD 8004.5 vs 11897.1; p < 0.001) compared with R-LLS in the ordinary—case group, whereas R-LLS was associated with shorter postoperative LOS (5.0 vs 3.5 days; p = 0.004) in the complex—case group. On multivariable analysis, R-LLS was predictive of shorter postoperative LOS [odds ratio (OR) 0.388, 95% confidence interval (CI) 0.198–0.760, p = 0.006], whereas R-LLS was predictive of higher surgery (OR 65.640, 95% CI 17.406–247.535, p < 0.001) and overall costs (OR 102.233, 95% CI 22.241–469.931, p < 0.001). Conclusion: Results of this study showed no clinical benefit to the R-LLS compared with L-LLS in ordinary cases. R-LLS had potential advantages in selected complex cases. [ABSTRACT FROM AUTHOR]

Purpose: Laparoscopic left lateral sectionectomy (LLLS) is a feasible and safe procedure with a relatively smooth learning curve. However, single-incision LLLS requires extensive surgical experience and advanced techniques. The aim of this study is to report the standardized single-incision plus one-port LLLS (reduced port LLLS, RPLLLS) technique and evaluate its safety, feasibility, and effectiveness for junior surgeons. Methods: Between January 2008 and November 2020, the clinical records of 49 patients who underwent LLLS, divided into the conventional LLLS (n = 37) and the RPLLLS group (n = 12), were retrospectively reviewed. The patient characteristics, pathologic results, and operative outcomes were evaluated. Results: A history of previous abdominal surgery in the RPLLLS group was significantly high (56.8% vs. 91.7%, p = 0.552). Notably, junior surgeons performed 62.2% of the conventional LLLSs and 58.4% of the standardized RPLLLSs. There were no significant differences between the two groups in terms of median operative time (121.0 vs. 113.5, p = 0.387), median blood loss (13.0 vs. 8.5, p = 0.518), median length of hospital stays (7.0 vs. 7.0, p = 0.408), and morbidity rate (2.7% vs. 0%, p = 0.565), respectively. Conclusion: This standardized RPLLLS is a feasible and safe alternative to conventional LLLS and may become the ideal training procedure for both junior surgeons and surgeons aiming to learn more complex procedures. [ABSTRACT FROM AUTHOR]

Objectives: To evaluate comparative outcomes of robotic and laparoscopic left lateral hepatic sectionectomy (LLS). Methods: A systematic search of PubMed, Web of Science, EMBASE and bibliographic reference lists with application of a combination of free text and controlled vocabulary search adapted to thesaurus headings, search operators and limits was conducted. Overall, minor (Clavien-Dindo grade < III) and major (Clavien-Dindo grade > III) postoperative complications, mortality, volume of blood loss, conversion to an open procedure, procedure time, length of hospital stay, cost-effectiveness and R1 resection were the evaluated outcome measures. Results: Seven comparative observational studies reporting a total of 319 patients of whom 150 underwent robotic LLS and the remaining 169 patients underwent laparoscopic LLS were included. The robotic approach was associated with significantly longer procedure time (MD: 29.40 min, p = 0.01) and higher cost (MD: $4170, p < 0.00001) compared to the laparoscopic approach. There was no significant difference in overall postoperative morbidity (OR: 1.29, p = 0.62), Clavien-Dindo grade < III (OR: 1.65, p = 0.49), Clavien-Dindo grade > III (OR: 1.18, p = 0.85), perioperative mortality (RD: 0.00, p = 1.00), volume of blood loss (MD: 1.96 mls, p = 0.91), conversion to an open procedure (RD: − 0.02, p = 0.46), length of hospital stay (MD: 0.22 day, p = 0.52) or R1 resection (RD:0.00, p = 1.00) between two groups. Conclusions: Meta-analysis of the best available evidence (level 2) demonstrated that robotic LLS is associated with significantly longer procedure time and higher cost and similar perioperative outcomes compared to the laparoscopic approach. Future randomised studies are required to evaluate short-term perioperative, long-term oncological and surgeon-centred outcomes. [ABSTRACT FROM AUTHOR]

Introduction: Living donor left lateral sectionectomy is a well-established alternative in cadaveric donor pediatric liver transplantation. This procedure has proven to be safe and reproducible. However, laparoscopic approach is still under development and evidence of its feasibility is limited. Aim: The aim of this article is to present the surgical technique and postoperative outcomes of the cases of laparoscopic left lateral sectionectomy performed in this center. Materials and Method: A retrospective, observational, single center study was conducted in Hospital del Salvador. From 04/2015 - 01/2021 laparoscopic left lateral sectionectomy was offered for donor surgery. We present the surgical technique, perioperative care, and early postoperative outcomes in donors. Results: This series includes 36 patients, 25 (69%) of them were males. A total of 31 (86%) donors were mother or father of the recipient. Median age of donors was 30 years (19-45), median operative time was 360 min (240-480). All the patients underwent laparoscopic left lateral sectionectomy. Conversion was necessary in one case due to difficult management of a venous bleeding. Clavien-Dindo Morbidity III, in one patient who required endoscopic retrograde cholangiopancreatography due to an early bile leak. Median hospitalization was 4 days (3-14). There was no mortality. Conclusion: Laparoscopic left lateral sectionectomy has proven to be safe and reproducible. This technique has evolved from an innovative procedure to become the current standard of practice in our center, with excellent results in terms of morbidity and mortality. [ABSTRACT FROM AUTHOR]

Abstract Background A right-sided ligamentum teres (RSLT) is a rare congenital anomaly in which the fetal umbilical vein is connected to the right paramedian trunk. RSLT creates difficulty in liver resection with respect to decision-making regarding the resection line, deviation of the vasculobiliary architecture. We report a case in which laparoscopic left lateral sectionectomy (LLLS) was performed to treat colorectal liver metastasis (CRLM) in a patient with RSLT. Case presentation A 63-year-old man with a past history of rectal cancer presented to our institution due to liver metastasis in the left lateral section from rectal cancer. In this patient, an RSLT was diagnosed and LLLS was planned. The lateral superior branch of the portal vein (P2) branched off behind the bifurcation of the portal vein and running separately from the common branch of the lateral inferior branch (P3) and left paramedian branch (P4) so that stapling could not be performed for liver resection. Frequent intraoperative ultrasonography (IOUS) was necessary to identify the root of P2 and P3. The resection line was distant from the falciform ligament and was carefully decided. The lateral superior branch of Glisson (G2) and lateral inferior branch of Glisson (G3) were separately resected. The patient had a favorable clinical course without any complications. Conclusions The resection line of LLLS, which is distant from the falciform ligament, should be carefully identified using IOUS due to the deviation of the umbilical portion and falciform ligament. The recognition of portal vein and hepatic vein anomalies and clear identification of the lateral sectional branches are important to complete LLLS in patients with an RSLT.

Abstract Background Laparoscopic liver resection has been regarded as the standard treatment for liver tumors located at the left lateral liver sector. However, few studies have reported the results of laparoscopic left lateral sectionectomy (LLS) for HCC, not to mention the feasibility of this emerging technique for the less experienced liver surgeons. The current study would reappraise the Louisville statement by examining the outcome of LLS performed by a young liver surgeon. Methods We retrospectively reviewed two separate groups of patients who underwent open or laparoscopic left lateral sectionectomies at Chung Gung Memorial Hospital, Linkou. All laparoscopic hepatectomies were performed by the index young surgeon following a stepwise stapleless LLS. The surgical results and oncological outcomes of laparoscopic vs. open hepatectomies (LH and OH, respectively) with the surgical indication of HCC at left lateral liver sector were further compared and analyzed. Results 18 of 29 patients in the laparoscopic group and 75 patients in the conventional open group had primary HCC. The demographic data was essentially the same for the two groups. Statistical analysis revealed that the LH group had smaller tumor size, higher blood transfusion requirement, longer duration of inflow control and parenchymal transection, and longer operation time. However, no significant difference was observed in terms of complication rate, mortality rate, and hospital stay between the two groups. After adjusting for tumor size, LH and OH showed no statistical difference in the amount of blood transfusion, operation time and patient survival. Conclusions This study demonstrated that stapleless LLS is a safe and feasible procedure for less experienced liver surgeons to resect HCC located at the left lateral liver sector. This stepwise stapleless LSS can not only achieve surgical results comparable to OH but also can provide a platform for liver surgeons to apply laparoscopic technique before conducting more complicated liver resections.

Objective: To introduce the laparoscopic approach in liver transplant recipients. Summary of Background Data: Despite the increasingly frequent use of laparoscopy in living donor hepatectomy, the laparoscopic approach has never been reported in liver transplant recipients. Methods: A 52-year-old woman (body mass index: 18.5 kg/m²) with neuroendocrine liver metastases of a digestive origin underwent hybrid liver transplantation by pure laparoscopic total hepatectomy and liver graft implantation using a preexisting midline incision. The hepatic pedicle vessels were dissected after division of the bile duct without a porto-caval shunt. Left lateral sectionectomy and early division of the common trunk allowed near completion of caval dissection with no prolonged inflow occlusion. The liver graft was reduced and latero-lateral caval anastomosis was performed. Results: Surgery lasted 400 minutes with 400 mL of blood loss. The anhepatic phase lasted 43 minutes. Warm ischemia time and cold ischemia times were 38 and 466 minutes, respectively. The postoperative course was uneventful. Conclusions: This case study suggests that the hybrid approach may be feasible and safe in selected recipients. The decision to use this surgical approach should be made in transplant centers with significant expertise in both laparoscopic liver and pancreatic surgery. Further reducing the size of the abdominal incision is the next step, which may be achieved with the development of vascular anastomoses devices. [ABSTRACT FROM AUTHOR]

Herein, we aimed to establish benchmark values – based on a composite indicator of healthcare quality – for the performance of laparoscopic left lateral sectionectomy (LLLS) and laparoscopic right hepatectomy (LRH) using data from expert centers. Data from a nationwide multicenter survey including all patients undergoing LLLS and LRH between 2000 and 2017 were analyzed. Textbook outcome (TO) completion was considered in patients fulfilling all 6 of the following characteristics: negative margins, no transfusion, no complication, no prolonged hospital stay, no readmission and no mortality. For each procedure, a cut-off laparoscopic liver resection (LLR) volume by center was associated with TO on multivariable analysis. These cut-offs defined the expert centers. The benchmark values were set at the 75th percentile of median outcomes among these expert centers. Among 4,400 LLRs performed in 29 centers, 855 patients who underwent LLLS and 488 who underwent LRH were identified. The overall incidences of TO after LLLS and LRH were 43.7% and 23.8%, respectively. LLR volume cut-offs of 25 LLR/year (odds ratio [OR] 2.45; bootstrap 95% CI 1.65–3.69; p = 0.001) and 35 LLR/year (OR 2.55; bootstrap 95% CI 1.34–5.63; p = 0.003) were independently associated with completion of TO after LLLS and LRH, respectively. Eight centers for LLLS and 6 centers for LRH, including 516 and 346 patients undergoing LLLS/LRH respectively, reached these cut-offs and were identified as expert centers. After LLLS, benchmark values of severe complication, mortality and TO completion were defined as ≤5.3%, ≤1.2% and ≥46.6%, respectively. After LRH, benchmark values of severe complication, mortality and TO completion were ≤20.4%, ≤2.8% and ≥24.2%, respectively. This study provides an up-to-date reference on the benchmark performance of LLLS and LRH in expert centers. In a nationwide French survey of laparoscopic liver resection, expert centers were defined according to the completion of a textbook outcome, which is a composite indicator of healthcare quality. Benchmark values regarding intra-operative details and outcomes were established using data from 516 patients with laparoscopic left lateral sectionectiomy and 346 patients with laparoscopic right hepatectomy from expert centers. These values should be used as a reference point to improve the quality of laparoscopic resections. • Laparoscopic left lateral sectionectomies/right hepatectomies from nationwide survey. • Identification of centers with best practices using textbook outcome as indicator. • Benchmarking from outcomes of centers with best practices. • Laparoscopic left lateral sectionectomy: severe complication ≤5%, mortality ≤1%. • Laparoscopic right hepatectomy: severe complication ≤20%, mortality ≤3%. [ABSTRACT FROM AUTHOR]

Introduction Hepatolithiasis is more prevalent in Far-East than in Middle-East countries. There are various treatment modalities available for hepatolithiasis like surgical and non-surgical procedures. Non-surgical procedures have higher recurrence rate. Methods This is a descriptive retrospective study of the clinical data of hepatolithiasis patients treated at Tribhuvan University Teaching Hospital (TUTH), Maharajgunj from April 2016 to October 2019. Results There were 14 patients and mean age was 45.8±14.8 years. It was more common in female (F: M = 4:3). Left sided hepatolithiasis was the most common type (50%). One (7.1%) patient had bilateral hepatolithiasis associated with unresectable cholangiocarcinoma. Eight (57.1%) patients were treated with surgical procedures; four (28.6%) patients underwent interventional radiological procedures and remaining two (14.3%) patients had combined surgical and intervetional radiological procedures. Complete stone clearance was achieved in 11 patients (78.57%). In surgical therapy group, seven out of eight (87.5%) patients achieved the complete stone clearance; two out of four (50%) patients in interventional radiology group and all patients in combined therapy group achieved the clearance. There was no recurrence among those patients who had complete stone clearance and there was no mortality. Conclusion The management of hepatolithiasis should involve multi-modality (surgical and non-surgical) therapeutic techniques available, in order to achieve complete stone clearance and prevent the complications. [ABSTRACT FROM AUTHOR]

Background: Laparoscopic liver resection is recommended as the standard operation for left lateral sectionectomy (LLS). Robotic liver resection is theoretically better than laparoscopic liver resection in complex cases of liver resection. However, in a complex case of LLS, whether robotic LLS (R-LLS) is still better than laparoscopic LLS (L-LLS) is unclear. This study aims to assess the perioperative outcomes of R-LLS and L-LLS in the overall and in the subgroup of complex cases of LLS.Methods: From January 2015 to June 2017, the data on consecutive patients who underwent R-LLS were retrospectively compared with those who underwent L-LLS. Based on defined criteria for complex cases, the subgroup of such patients who underwent R-LLS were compared with the subgroup of patients who underwent L-LLS. The patient characteristics and surgical outcomes in the whole groups and subgroups of patients were analyzed.Results: The overall R-LLS and L-LLS groups showed no significance differences in operative time, intraoperative blood loss, postoperative hospital stay, blood transfusion and morbidity rates. The overall medical costs were significantly higher in the R-LLS group than in the L-LLS group (12786.4 vs. 7974.3 USD; p < 0.001). On subgroup analysis of the complex cases, the estimated blood loss was significantly less in the R-LLS subgroup than the L-LLS subgroup (131.9 vs. 320.8 ml, p = 0.003). The two subgroups showed no significant differences in postoperative hospital stay (4.7 vs. 5.3 days; p = 0.054) and operative times (126.4 vs. 110.8 min; p = 0.379). The R-LLS subgroup had significantly higher overall medical costs than the L-LLS subgroup (13536.9 vs. 9186.7 USD, p = 0.006).Conclusion: The overall R-LLS group was comparable to the overall L-LLS group in perioperative outcomes. Although the overall medical costs in the robotic subgroup was higher, R-LLS might be a better choice for the subgroup of patients with complex cases when compared to L-LLS. [ABSTRACT FROM AUTHOR]

Introduction. Living donor liver transplantation has proved to be an effective, safe and radical treatment modality for patients with end-stage liver diseases. Left lateral section (LLS) of donor’s liver is used in pediatric recipients. Laparoscopic LLS procurement was fi rst described by D. Cherqui in 2002. At present, this technique is routinely used only by 5 hospitals in the world. However, up to date, some authors consider it to be a new standard to perform such a surgery in living donors.Aim. To analyze the fi rst Russian experience in laparoscopic left lateral sectionectomy (LapLLS) in living related donor.Materials and methods. From May to September 2016 fi ve LapLLS were performed in living donors. In all cases donors were women (mothers in 4 cases and aunt in 1 case). Recipients were children aged from 6 months through 3 years with body mass from 5.6 to 12.5 kg. Liver transection was carried out under conditions of maintained blood supply. Parenchymal transection was performed using a harmonic scalpel, bipolar coagulation and ultrasound dissection.Results. Average donor age was 32 ± 5 years. Average operation time was 287 ± 16 min. Average LLS graft weight was 220 ± 16 g. Intraoperative blood loss did not exceed 100 ml (95 ± 5 ml). Donors were discharged on the 3rd–4th post-op day. There were no postoperative complications in donors. Recipients were also characterized by a standard course of the postoperative period.Conclusion. LapLLS is an effective and safe method with several advantages. Primarily, these are early rehabilitation of the donors and shortening of the hospital stay, which are important for the quick return to normal way of live. Excellent visualization of anatomical structures, including vascular and biliary ones, allows performing precise selection. In addition, good cosmetic effect is also an important aspect.

The objective of this study was to assess the clinical impact of laparoscopic hepatectomy from technical and oncological viewpoints through the consecutive 5-year experience of an expert team. The subjects consisted of 491 consecutive hepatectomies performed over the course of 5 years. A total of 190 hepatectomies (38.6 %) were performed laparoscopically, and the remaining 301 (61.4 %) were open hepatectomies. Chronological trends of operative procedures and their indications were evaluated, and patients with hepatocellular carcinoma (HCC) were analyzed from an oncological viewpoint. The proportion of laparoscopic hepatectomies performed increased significantly during the study period (from 17.6 to 49.5 %). According to chronological trends, right hepatectomy was standardized using consecutive steps after minor hepatectomy, left lateral sectionectomy, and left hepatectomy were standardized. The proportion of laparoscopic hepatectomies performed for HCC increased from 21.4 to 71.0 %. No significant difference was observed in the proportion of major hepatectomies performed for HCC between the open and laparoscopy groups (50.6 vs. 48.6 %, p = 0.8053), whereas that of anatomical segmentectomy for HCC was significantly lower in the laparoscopy group (28.7 vs. 11.1 %, p = 0.0064). All laparoscopic anatomical segmentectomies were of segments 5 and 6, and there was no segmentectomy of posterosuperior lesions. The present study shows the consecutive technical developmental processes for minor hepatectomy, left lateral sectionectomy, left hepatectomy, and right hepatectomy without compromising oncological principles. Laparoscopic anatomical segmentectomy for posterosuperior lesions may be the most technically demanding procedure, requiring individualized standardization. [ABSTRACT FROM AUTHOR]

Background: Laparoscopy was suggested as gold standard for left lateral sectionectomy (LLS), thanks to recognized benefits compared to open approach. Aim of this study was to define learning curve (LC) of laparoscopic LLS (LLLS) using operative time (OT) as tool to analyze outcome of procedures performed by four experienced surgeons. Reproducibility and safety of LC in LLLS among independent surgeons were also analyzed as essential features of "standard procedure" concept.Methods: LLLS performed by four experienced surgeons was collected. Multivariate analysis was carried out to screen factors affecting OT. A cumulative LC was created calculating median OT. Skewness of OT was analyzed, and ROC curve was carried out to identify the cutoff for LC. The impact of LC on outcomes (morbidity and mortality, blood loss, conversions, surgical margins and length of stay) was determined.Results: A total of 245 LLLSs were collected. Conversion rate was 1.2 %. Median OT was 141 min, blood loss 100 mL, morbidity 11.4 % and mortality 0.4 %. "Associated procedures" was the only independent factor affecting OT. The skewness of the OT was calculated, and the cutoff point for LC was determined after 15 LLLSs. LLLS performed during and after LC period had similar outcomes.Conclusion: LLLS is feasible with low morbidity, mortality and conversion rate. LC in LLLS is shorter compared to minor liver resections. Furthermore, it is reproducible and safe since it does not negatively affect clinical outcome. A reproducible, safe and short LC contributes to considering laparoscopy as the gold standard approach to perform LLS. [ABSTRACT FROM AUTHOR]

Background: Extra-nodal marginal zone B cell lymphoma of mucosa-associated lymphoid tissue originating in the liver is less common. Case presentation: We described the clinical presentation, immunohistochemistry, and immunophenotypes of this lymphoma, which was misdiagnosed with tiny hepatic carcinoma in a 44-year-old woman with hepatitis C; the patient underwent left lateral sectionectomy. The immunophenotype identified the most of the lymphoid cells as positive CD20, CD34, Ki67, CD3, CD4, CD79a, CD45RO, MUM-1, and CD5 and negative CD10, CD15, CD30, ACT, CK, CRO, DES, and HMB45. The diagnosis of primary hepatic mucosa-associated lymphoid tissue (MALT) was made by histology after surgery; the patient went through the excellent recovery with no chemotherapy and is disease free for 27 months. Conclusions: Primary hepatic MALT is less common with incidental finding; local resection is beneficial due to its oncological indolence. [ABSTRACT FROM AUTHOR]

Background Both laparoscopic and robotic hepatectomy have been adopted in our centre for selected patients with benign or malignant liver diseases. This article reports the perioperative outcomes of these two approaches and tries to determine any difference between them. Methods A retrospective review of prospectively collected data was performed for all patients who underwent laparoscopic hepatectomy ( LH) and robotic hepatectomy ( RH) in our institute. The perioperative results were reported and compared. In order to standardise the type of liver resection performed, a subgroup analysis was made for laparoscopic left lateral sectionectomy ( LS) and robotic left lateral sectionectomy ( RS). Results Sixty-six LH and 70 RH were performed between November 2003 and January 2015. The two groups were comparable in demographic data and disease characteristics except more patient with recurrent pyogenic cholangitis ( RPC) occurred in RH group. More major hepatectomies were performed in RH (20.0% versus 3.0%, P = 0.002). There was no mortality. No difference was noted in morbidity ( LH 4.5%, RH 11.4%), conversion rate ( LH 12.1%, RH 5.7%), median blood loss (both 100 mL) and median length of post-operative hospital stay (both 5 days) but operative time was longer in RH (251.5 min versus 215 min, P = 0.008). There were 29 LS and 38 RS, no difference was noted in all perioperative outcomes between the two groups. Conclusion Both laparoscopic and robotic hepatectomy are safe and their perioperative outcomes are comparable and favourable. [ABSTRACT FROM AUTHOR]

Background: Tumor size (TS) represents a critical parameter in the risk assessment of laparoscopic liver resections (LLR). Moreover, TS has been rarely related to the extent of liver resection. The aim of this study was to study the relationship between tumor size and difficulty of laparoscopic left lateral sectionectomy (L-LLS)., Methods: The impact of TS cutoffs was investigated by stratifying tumor size at each 10 mm-interval. The optimal cutoffs were chosen taking into consideration the number of endpoints which show a statistically significant split around the cut-points of interest and the magnitude of relative risk after correction for multiple risk factors., Results: A total of 1910 L-LLS were included. Overall, open conversion and intraoperative blood transfusion were 3.1 and 3.3%, respectively. The major morbidity rate was 2.7% and 90-days mortality 0.6%. Three optimal TS cutoffs were identified: 40-, 70-, and 100-mm. All the selected cutoffs showed a significant discriminative power for the prediction of open conversion, operative time, blood transfusion and need of Pringle maneuver. Moreover, 70- and 100-mm cutoffs were both discriminative for estimated blood loss and major complications. A stepwise increase in rates of open conversion rate (Z = 3.90, P < .001), operative time (Z = 3.84, P < .001), blood loss (Z = 6.50, P < .001), intraoperative blood transfusion rate (Z = 5.15, P < .001), Pringle maneuver use (Z = 6.48, P < .001), major morbidity(Z = 2.17, P = .030) and 30-days readmission (Z = 1.99, P = .047) was registered as the size increased., Conclusion: L-LLS for tumors of increasing size was associated with poorer intraoperative and early postoperative outcomes suggesting increasing difficulty of the procedure. We determined three optimal TS cutoffs (40-, 70- and 100-mm) to accurately stratify surgical difficulty after L-LLS., (© 2022 Japanese Society of Hepato-Biliary-Pancreatic Surgery.)

Background: A right-sided ligamentum teres (RSLT) is a rare congenital anomaly in which the fetal umbilical vein is connected to the right paramedian trunk. RSLT creates difficulty in liver resection with respect to decision-making regarding the resection line, deviation of the vasculobiliary architecture. We report a case in which laparoscopic left lateral sectionectomy (LLLS) was performed to treat colorectal liver metastasis (CRLM) in a patient with RSLT.Case presentation: A 63-year-old man with a past history of rectal cancer presented to our institution due to liver metastasis in the left lateral section from rectal cancer. In this patient, an RSLT was diagnosed and LLLS was planned. The lateral superior branch of the portal vein (P2) branched off behind the bifurcation of the portal vein and running separately from the common branch of the lateral inferior branch (P3) and left paramedian branch (P4) so that stapling could not be performed for liver resection. Frequent intraoperative ultrasonography (IOUS) was necessary to identify the root of P2 and P3. The resection line was distant from the falciform ligament and was carefully decided. The lateral superior branch of Glisson (G2) and lateral inferior branch of Glisson (G3) were separately resected. The patient had a favorable clinical course without any complications.Conclusions: The resection line of LLLS, which is distant from the falciform ligament, should be carefully identified using IOUS due to the deviation of the umbilical portion and falciform ligament. The recognition of portal vein and hepatic vein anomalies and clear identification of the lateral sectional branches are important to complete LLLS in patients with an RSLT. [ABSTRACT FROM AUTHOR]

Background: Laparoscopic liver resection has been regarded as the standard treatment for liver tumors located at the left lateral liver sector. However, few studies have reported the results of laparoscopic left lateral sectionectomy (LLS) for HCC, not to mention the feasibility of this emerging technique for the less experienced liver surgeons. The current study would reappraise the Louisville statement by examining the outcome of LLS performed by a young liver surgeon.Methods: We retrospectively reviewed two separate groups of patients who underwent open or laparoscopic left lateral sectionectomies at Chung Gung Memorial Hospital, Linkou. All laparoscopic hepatectomies were performed by the index young surgeon following a stepwise stapleless LLS. The surgical results and oncological outcomes of laparoscopic vs. open hepatectomies (LH and OH, respectively) with the surgical indication of HCC at left lateral liver sector were further compared and analyzed.Results: 18 of 29 patients in the laparoscopic group and 75 patients in the conventional open group had primary HCC. The demographic data was essentially the same for the two groups. Statistical analysis revealed that the LH group had smaller tumor size, higher blood transfusion requirement, longer duration of inflow control and parenchymal transection, and longer operation time. However, no significant difference was observed in terms of complication rate, mortality rate, and hospital stay between the two groups. After adjusting for tumor size, LH and OH showed no statistical difference in the amount of blood transfusion, operation time and patient survival.Conclusions: This study demonstrated that stapleless LLS is a safe and feasible procedure for less experienced liver surgeons to resect HCC located at the left lateral liver sector. This stepwise stapleless LSS can not only achieve surgical results comparable to OH but also can provide a platform for liver surgeons to apply laparoscopic technique before conducting more complicated liver resections. [ABSTRACT FROM AUTHOR]

Background: The laparoscopic approach is increasingly adopted for liver resections today especially for lesions located in the left lateral liver section. This study was conducted to determine the impact of the introduction of laparoscopic liver resection (LLR) as a surgical option for suspected small- to medium-sized (<8 cm) tumors located in the left lateral section (LLS)., Methods: This is a retrospective review of 156 consecutive patients who underwent LLR or open liver resection (OLR) of tumors located in the LLS. The study was divided into 2 consecutive periods (period 1, January 2003 through September 2006, and period 2, October 2006 through April 2014); LLR was available as a surgical option only in the latter period. Comparisons made were LLR versus OLR, LLR versus OLR (in period 2 only), and resections performed in period 1 versus period 2., Results: Forty-two patients underwent LLR with 4 conversions. LLR was significantly associated with a longer median operative time [167.5 minutes (range, 60-525) vs 105 minutes (range, 40-235); P < .001], decreased need for the Pringle maneuver [n = 1 (2%) vs 22 (19%); P = .008], and shorter postoperative stay [n = 4 (range, 1-10) days vs 5 days (range, 2-47); P < .001] compared with open resection. Comparison of the 42 patients who underwent LLR with the 64 contemporaneous patients who underwent OLR demonstrated similar outcomes. Again, LLR was associated with a significantly longer operation, decreased need for the Pringle maneuver, and shorter hospital stay., Conclusions: LLR can be safely adopted to treat lesions in the LLS. The procedure is associated with a shorter postoperative stay and a decreased need for the Pringle maneuver, but longer operative time compared with that required for OLR.