Isoperistaltic vs antiperistaltic anastomosis after right hemicolectomy:A comprehensive review

To optimize the efficiency of ileocolic anastomosis following right hemicolectomy,several variations of the surgical technique have been tested.These include performing the anastomosis intra-or extracorporeally or performing a stapled or hand-sewn anastomosis.Among the least studied is the configuration of the two stumps(i.e.,isoperistaltic or antiperistaltic)in the case of a side-to-side anastomosis.The purpose of the present study is to compare the isoperistaltic and antiperistaltic side-to-side anastomotic configuration after right hemicolectomy by reviewing the relevant literature.High-quality literature is scarce,with only three studies directly comparing the two alternatives,and no study has revealed any significant differences in the incidence of anastomosis-related complications such as leakage,stenosis,or bleeding.However,there may be a trend towards an earlier recovery of intestinal function following antiperistaltic anastomosis.Finally,existing data do not identify a certain anastomotic configuration(i.e.,isoperistaltic or antiperistaltic)as superior over the other.Thus,the most appropriate approach is to master both anastomotic techniques and select between the two configurations based on each individual case scenario.

Causes of epigastric pain and vomiting after laparoscopic-assisted radical right hemicolectomy-superior mesenteric artery syndrome

BACKGROUND Superior mesenteric artery syndrome(SMAS)is a rare condition causing functional obstruction of the third portion of the duodenum.Postoperative SMAS following laparoscopic-assisted radical right hemicolectomy is even less prevalent and can often be unrecognized by radiologists and clinicians.AIM To analyze the clinical features,risk factors,and prevention of SMAS after laparoscopic-assisted radical right hemicolectomy.METHODS We retrospectively analyzed clinical data of 256 patients undergoing laparoscopicassisted radical right hemicolectomy in the Affiliated Hospital of Southwest Medical University from January 2019 to May 2022.The occurrence of SMAS and its countermeasures were evaluated.Among the 256 patients,SMAS was confirmed in six patients(2.3%)by postoperative clinical presentation and imaging features.All six patients were examined by enhanced computed tomography(CT)before and after surgery.Patients who developed SMAS after surgery were used as the experimental group.A simple random sampling method was used to select 20 patients who underwent surgery at the same time but did not develop SMAS and received preoperative abdominal enhanced CT as the control group.The angle and distance between the superior mesenteric artery and abdominal aorta were measured before and after surgery in the experimental group and before surgery in the control group.The preoperative body mass index(BMI)of the experimental group and the control group was calculated.The type of lymphadenectomy and surgical approach in the experimental and control groups were recorded.The differences in angle and distance were compared preoperatively and postoperatively in the experimental group compared.The differences in angle,distance,BMI,type of lymphadenectomy and surgical approach between the experimental and control groups were compared,and the diagnostic efficacy of the significant parameters was assessed using receiver operating characteristic curves.RESULTS In the experimental group,the aortomesenteric angle and distance after surgery were significantly decreased than those before surgery(P<0.05).The aortomesenteric angle,distance and BMI were significantly higher in the control group than in the experimental(P<0.05).There was no significant difference in the type of lymphadenectomy and surgical approach between the two groups(P>0.05).CONCLUSION The small preoperative aortomesenteric angle and distance and low BMI may be important factors for the complication.Over-cleaning of lymph fatty tissues may also be associated with this complication.

En bloc pancreaticoduodenectomy and right hemicolectomy for locally advanced right-sided colon cancer

AIM To assess the usefulness of en bloc right hemicolectomy with pancreaticoduodenectomy(RHCPD) for locally advanced right-sided colon cancer(LARCC).METHODS We retrospectively reviewed the database of Saitama Medical Center, Jichi Medical University, between January 2009 and December 2016. During this time, 299 patients underwent radical right hemicolectomy for right-sided colon cancer. Among them, 5 underwent RHCPD for LARCC with tumor infiltration to adjacent organs. Preoperative computed tomography(CT) was routinely performed to evaluate local tumor infiltration into adjacent organs. During the operation, we evaluated the resectability and the amount of infiltration into the adjacent organs without dissecting the adherent organs from the cancer. When we confirmed that radical resection was feasible and could lead to R0 resection, we performed RHCPD. The clinical data were carefully reviewed, and the demographic variables, intraoperative data, and postoperative parameters were recorded.RESULTS The median age of the 5 patients who underwent RHCPD for LARCC was 70 years. The tumors were located in the ascending colon(three patients) and transverse colon(two patients). Preoperative CT revealed infiltration of the tumor into the duodenum in all patients, the pancreas in four patients, the superior mesenteric vein(SMV) in two patients, and tumor thrombosis in the SMV in one patient. We performed RHCPD plus SMV resection in three patients. Major postoperative complications occurred in 3 patients(60%) as pancreatic fistula(grade B and grade C, according to International Study Group on Pancreatic Fistula Definition) and delayed gastric empty. None of the patients died during their hospital stay. A histological examination confirmed malignant infiltration into the duodenum and/or pancreas in 4 patients(80%), and no patients showed any malignant infiltration into the SMV. Two patients were histologically confirmed to have tumor thrombosis in the SMV. All of the tumors had clear resection margins(R0). The median follow-up time was 77 mo. During this period, two patients with tumor thrombosis died from liver metastasis. The overall survival rates were 80% at 1 year and 60% at 5 years. All patients with node-negative status(n = 2) survived for more than seven years.CONCLUSION This study showed that the long-term survival is possible for patients with LARCC if RHCPD is performed successfully, particularly in those with node-negative status.

Pure transvaginal natural orifice transluminal endoscopic surgery right hemicolectomy for colon cancer:A case report

BACKGROUND Pure natural orifice transluminal endoscopic surgery(NOTES)for colorectal cancer is a complex procedure and rarely used in clinical practice because of the ethical concerns and technical challenges,including loss of triangulation,in-line orientation,and instrument collision.Transvaginal(v)NOTES,however,can overcome these technical challenges.We report a case of pure vNOTES right hemicolectomy for colon cancer,attached with surgical video.CASE SUMMARY A 65-year-old woman with a 2-year history of intermittent diarrhea was diagnosed with ascending colon adenocarcinoma by colonoscopy and biopsy.Pure vNOTES right hemicolectomy was performed with complete mesocolic excision by well-experienced surgeons.The operative time was 200 min and the estimated blood loss was 30 mL.No intraoperative or postoperative complications occurred within 30 d after the surgery.The visual analog scale pain score on postoperative day 1 was 1 and dropped to 0 on postoperative days 2 and 3.The patient was discharged at postoperative day 6.The pathologic specimen had sufficient clear resection margins and 14 negative harvested lymph nodes.CONCLUSION vNOTES right hemicolectomy,performed by well-experienced surgeons,overcomes the technical challenges of pure NOTES and may be feasible for colon cancer.

Does cranial-medial mixed dominant approach have a unique advantage for laparoscopic right hemicolectomy with complete mesocolic excision?

BACKGROUND Complete mesocolic excision(CME)with central vascular ligation(CVL)was proposed by Hohenberger in 2009.The CME principle has gradually become the technical standard for colon cancer surgery.How to achieve CME with CVL in laparoscopic right hemicolectomy(LRH)is controversial,and a unified standard approach is not yet available.In recent years,the authors’team has integrated the theory of membrane anatomy,tried to combine the cephalic approach with the classic medial approach(MA)for technical optimization,and proposed a cranialmedial mixed dominant approach(CMA).AIM To explore the feasibility of operational approaches for LRH with CME.METHODS In this retrospective cohort study,the clinical data of 57 patients with right-sided colon cancer(TNM stage I,II,or III)who underwent LRH with CME from January 2016 to June 2020 were collected and summarized.There were 31 patients in the traditional MA group and 26 in the CMA group.RESULTS There were no significant differences in baseline data between the two groups.The operation was shorter and the number of lymph nodes dissected was higher in the CMA group than in the MA group,but there was no significant difference in the number of positive lymph nodes,intraoperative blood loss,postoperative exhaust time,feeding time,postoperative hospital stay or postoperative complication incidence.CONCLUSION Our study shows that the CMA is a safe and feasible procedure for LRH with CME and has a unique advantage.

Robotic vs laparoscopic right colectomy—the burden of age and comorbidity in perioperative outcomes: An observational study

BACKGROUND Several studies have shown the safety,feasibility and oncologic adequacy of robotic right hemicolectomy(RRH).Laparoscopic right hemicolectomy(LRH)is considered technically challenging.Robotic surgery has been introduced to overcome this technical limitation,but it is related to high costs.To maximize the benefits of such surgery,only selected patients are candidates for this technique.In addition,due to progressive aging of the population,an increasing number of minimally invasive procedures are performed on elderly patients with severe comorbidities,who are usually more prone to post-operative complications.AIM To investigate the outcomes of RRH vs LRH with regard to age and comorbidities.METHODS We retrospectively analyzed 123 minimally invasive procedures(68 LRHs vs 55 RRHs)for right colon cancer or endoscopically unresectable adenoma performed in our Center from January 2014 until September 2019.The surgical procedures were performed according to standardized techniques.The primary clinical outcome of the study was the length of hospital stay(LOS)measured in days.Secondary outcomes were time to first flatus(TFF)and time to first stool evacuation.The robotic technique was considered the exposure and the laparoscopic technique was considered the control.Routine demographic variables were obtained,including age at time of surgery and gender.Body mass index and American Society of Anesthesiologists physical status were registered.The age-adjusted Charlson Comorbidity Index(ACCI)was calculated;the tumornode-metastasis system,intra-operative variables and post-operative complications were recorded.Post-operative follow-up was 180 d.RESULTS LOS,TFF,and time to first stool were significantly shorter in the robotic group:Median 6[interquartile range(IQR)5-8]vs 7(IQR 6-10.5)d,P=0.028;median 2(IQR 1-3)vs 3(IQR 2-4)d,P<0.001;median 4(IQR 3-5)vs 5(IQR 4-6.5)d,P=0.005,respectively.Following multivariable analysis,the robotic technique was confirmed to be predictive of significantly shorter hospitalization and faster restoration of bowel function;in addition the dichotomous variables of age over75 years and ACCI more than 7 were significant predictors of hospital stay.No outcomes were significantly associated with Clavien-Dindo grading.Sub-group analysis demonstrated that patients aged over 75 years had a longer LOS(median6-IQR 5-8-vs 7-IQR 6-12-d,P=0.013)and later TFF(median 2-IQR 1-3-vs 3-IQR 2-4-d,P=0.008),while patients with ACCI more than 7 were only associated with a prolonged hospital stay(median 7-IQR 5-8-vs 7-IQR 6-14.5-d,P=0.036).CONCLUSION RRH is related to shorter LOS when compared with the laparoscopic approach,but older age and several comorbidities tend to reduce its benefits.

Ileocecal intussusception caused by two different tumors - which is the culprit lesion? A case report

BACKGROUND Ileocecal intussusception caused by two different tumors is rare,according to a literature review.We describe a case of a male patient with a cauliflower-like mass in the middle of the transverse colon observed by colonoscopy before surgery.It was considered to be intussusception caused by colon cancer.However,a substantial lipomatous mass was seen in the distal end of the intussusception by computed tomography before surgery,which posed a challenge in the preoperative diagnosis.CASE SUMMARY We report a 72-year-old male patient with intussusception.The patient underwent right hemicolectomy and cholecystectomy in our hospital on April 29,2019.During operation,the ileum was inserted into the ascending colon by about 15 cm,and a tumor with a diameter of approximately 3.0 cm was observed in the distal part of the intestine.An atypical liposarcoma/highly differentiated liposarcoma in the adipose tissue was suspected in the postoperative pathology,and a lipoma was diagnosed after MDM2 gene testing.A 4.0 cm×5.0 cm polypoid mass was seen immediately adjacent to the mass,and the postoperative pathology report suggested a high-level tubular adenoma.The patient was eventually cured and discharged with an uneventful follow-up.CONCLUSION Intussusception caused by two different types of masses is extremely rare.At present,surgery is the best treatment once intussusception is diagnosed.

“动脉优先”入路法应用于腹腔镜右半结肠癌完整结肠系膜切除术的可行性和安全性

背景:按既往指南,右半结肠癌根治术中应清扫肠系膜上动脉(SMA)右侧的淋巴结并整块移除。然而,由于技术难度和并发症风险,大多数外科医生是沿着肠系膜上静脉(SMV)进行淋巴结清扫。因此,我们在进行腹腔镜右半结肠扩大切除加完整结肠系膜切除(CME)时,提出了一种“动脉优先”入路法。方法:连续收治2016年1-10月间22例右半结肠癌患者,行“动脉优先”入路法腹腔镜右半结肠癌根治术。显露和分离SMA和SMV右侧壁,整块清扫No.203、No.213和No.223组淋巴结。游离Toldt筋膜,侧方分离至升结肠,向上分离至胰头;将升结肠系膜根部连同侧方组织整块切除。结果:22例患者中男性9例,女性13例;平均年龄63.1(39-83)岁;平均体质指数为24.6(18.3-37.7)kg/m^(2)。平均手术时间192.5(145-240)分钟,平均术中出血55.0(10-300)mL。淋巴结获检数目平均27.0(13-55)枚。术后排气时间平均35.0(26-120)小时,术后住院时间平均7.5(5-20)天。术后仅2例患者出现轻微并发症,无一例死亡病例。结论:初步结果提示,“动脉优先”入路法用于腹腔镜右半结肠癌根治术是安全可行的,而且更加符合CME原则。