Aim of the study is to comprehensively review the latest trends in laparoscopic complete mesocolic excision(CME) with central vascular ligation(CVL) for the multimodal management of right colon cancer. Historical and ...Aim of the study is to comprehensively review the latest trends in laparoscopic complete mesocolic excision(CME) with central vascular ligation(CVL) for the multimodal management of right colon cancer. Historical and up-to-date anatomo-embryological concepts are analyzed in detail,focusing on the latest studies of the mesenteric organ,its dissection by mesofascial and retrofascial cleavage planes,and questioning the need for a new terminology in colonic resections. The rationale behind Laparoscopic CME with CVL is thoroughly investigated and explained. Attention is paid to the current surgical techniques and the quality of the surgical specimen,yielded through mesocolic,intramesocolic and muscularis propria plane of surgery. We evaluate the impact on long term oncologic outcome in terms of local recurrence,overall and disease-free survival,according to the plane of resection achieved. Conclusions are drawn on the basis of the available evidence,which suggests a pivotal role of laparoscopic CME with CVL in the multimodal management of right sided colonic cancer: performed in the right mesocolic plane of resection,laparoscopic CME with CVL demonstrates better oncologic results when compared to standard non-mesocolic planes of surgery,with all the advantages of laparoscopic techniques,both in faster recovery and better immunological response. The importance of minimally invasive mesoresectional surgery is thus stressed and highlighted as the new frontier for a modern laparoscopic total right mesocolectomy.展开更多
BACKGROUND Cyclin-dependent kinase 9(CDK9)expression and autophagy in colorectal cancer(CRC)tissues has not been widely studied.CDK9,a key regulator of transcription,may influence the occurrence and progression of CRC...BACKGROUND Cyclin-dependent kinase 9(CDK9)expression and autophagy in colorectal cancer(CRC)tissues has not been widely studied.CDK9,a key regulator of transcription,may influence the occurrence and progression of CRC.The expression of auto-phagy-related genes BECN1 and drug resistance factor ABCG2 may also play a role in CRC.Under normal physiological conditions,autophagy can inhibit tumorigenesis,but once a tumor forms,autophagy may promote tumor growth.Therefore,understanding the relationship between autophagy and cancer,partic-ularly how autophagy promotes tumor growth after its formation,is a key motivation for this research.AIM To investigate the relationship between CDK9 expression and autophagy in CRC,assess differences in autophagy between left and right colon cancer,and analyze the associations of autophagy-related genes with clinical features and prognosis.METHODS We collected tumor tissues and paracarcinoma tissues from colon cancer patients with liver metastasis to observe the level of autophagy in tissues with high levels of CDK9 and low levels of CDK9.We also collected primary tissue from left and right colon cancer patients with liver metastasis to compare the autophagy levels and the expression of BECN1 and ABCG2 in the tumor and paracarcinoma tissues.RESULTS The incidence of autophagy and the expression of BECN1 and ABCG2 were different in left and right colon cancer,and autophagy might be involved in the occurrence of chemotherapy resistance.Further analysis of the rela-tionship between the expression of autophagy-related genes CDK9,ABCG2,and BECN1 and the clinical features and prognosis of colorectal cancer showed that the high expression of CDK9 indicated a poor prognosis in colorectal cancer.CONCLUSION This study laid the foundation for further research on the combination of CDK9 inhibitors and autophagy inhibitors in the treatment of patients with CRC.展开更多
Right-sided colon cancers (RCC) and left-sided colon cancers (LCC) have different epidemiological, physiological, pathological, genetic, and clinical characteristics, which result in differences in the course, prognos...Right-sided colon cancers (RCC) and left-sided colon cancers (LCC) have different epidemiological, physiological, pathological, genetic, and clinical characteristics, which result in differences in the course, prognosis, and outcome of disease. The objective of our study is to compare right-sided colon cancers and left-sided colon cancers regarding clinicopathological and survival characteristics. This is a retrospective study of 664 patients with colon cancer treated at the medical oncology department of Fez over a period from December 2009 to September 2020. Rectosigmoid, descending colon, and splenic flexure tumors were considered left-sided colon cancers, whereas ascending colon tumors were considered right-sided colon cancers. The Kaplan Meier method was used to estimate median survival. The study included 664 patients (female, 47%) having colon cancer with a median age of 60 years (23 - 83). Of the patients, 78.5% (n = 519) had LCC and 19.36 % (n = 128) had RCC. The rate of patients aged ≥ 65 years and the rate of patients with a family history of colon cancer was higher in the LCC patients. The proportion of poorly differentiated adenocarcinomas represented 3%, of which 63% had cancer of the right colon. There was a significantly higher proportion of higher T stage (T3-4: 62% vs 38%) in right sided tumors as compared to left sided tumors. The rate of metastatic patients was 64.1% in the RCC group and 43% in the LCC group. The median follow-up period was 14 months in the RCC group and 19 months in the LCC group with higher median overall survival in the LCC group (32 vs 21 months). We found histopathological differences between right and left sided colon cancer. Tumors on the right colon were found to be more aggressive, as expressed by poorer differentiation, higher T stage associated with a median overall survival better in left colon cancer.展开更多
The colon is derived from the embryological midgut and hindgut separately,with the right colon and left colon having different features with regards to both anatomical and physiological characteristics.Cancers located...The colon is derived from the embryological midgut and hindgut separately,with the right colon and left colon having different features with regards to both anatomical and physiological characteristics.Cancers located in the right and left colon are referred to as right colon cancer(RCC) and left colon cancer(LCC),respectively,based on their apparent anatomical positions.Increasing evidence supports the notion that not only are there differences in treatment strategies when dealing with RCC and LCC,but molecular features also vary between them,not to mention the distinguishing clinical manifestations.Disease-free survival after radical surgery of both RCC and LCC are similar.In the treatment of RCC,the benefit gained from adjuvant FOLFIRI chemotherapy is superior,or at least similar,to LCC,but inferior to LCC if FOLFOX regimen is applied.On the other hand,metastatic LCC exhibits longer survival than that of RCC in a palliative chemotherapy setting.For KRAS wild-type cancers,LCC benefits more from cetuximab treatment than RCC.Moreover,advanced LCC shows a higher sensitivity to bevacizumab treatment in comparison with advanced RCC.Significant varieties exist at the molecular level between RCC and LCC,which may serve as the cause of all apparent differences.With respect to carcinogenesis mechanisms,RCC is associated with known gene types,such as MMR,KRAS,BRAF,and mi RNA-31,while LCC is associated with CIN,p53,NRAS,mi RNA-146 a,mi RNA-147 b,and mi RNA-1288.Regarding protein expression,RCC is related to GNAS,NQO1,telomerase activity,P-PDH,and annexin A10,while LCC is related to Topo I,TS,and EGFR.In addition,separated pathways dominate progressionto relapse in RCC and LCC.Therefore,RCC and LCC should be regarded as two heterogeneous entities,with this heterogeneity being used to stratify patients in order for them to have the optimal,current,and novel therapeutic strategies in clinical practice.Additional research is needed to uncover further differences between RCC and LCC.展开更多
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 ...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.展开更多
AIM:To evaluate the feasibility,safety,and oncologic outcomes of laparoscopic extended right hemicolectomy(LERH)for colon cancer.METHODS:Since its establishment in 2009,the Southern Chinese Laparoscopic Colorectal Sur...AIM:To evaluate the feasibility,safety,and oncologic outcomes of laparoscopic extended right hemicolectomy(LERH)for colon cancer.METHODS:Since its establishment in 2009,the Southern Chinese Laparoscopic Colorectal Surgical Study(SCLCSS)group has been dedicated to promoting patients’quality of life through minimally invasive surgery.The multicenter database was launched by combining existing datasets from members of the SCLCSS group.The study enrolled 220 consecutive patients who were recorded in the multicenter retrospective database and underwent either LERH(n=119)or open extended right hemicolectomy(OERH)(n=101)for colon cancer.Clinical characteristics,surgical outcomes,and oncologic outcomes were compared between the two groups.RESULTS:There were no significant differences in terms of age,gender,body mass index(BMI),history of previous abdominal surgery,tumor location,and tumor stage between the two groups.The blood loss was lower in the LERH group than in the OERH group[100(100-200)mL vs 150(100-200)mL,P<0.0001].The LERH group was associated with earlier first flatus(2.7±1.0 d vs 3.2±0.9 d,P<0.0001)and resumption of liquid diet(3.6±1.0 d vs 4.2±1.0 d,P<0.0001)compared to the OERH group.The postoperative hospital stay was significantly shorter in the LERH group(11.4±4.7 d vs 12.8±5.6 d,P=0.009)than in the OERH group.The complication rate was 11.8%and17.6%in the LERH and OERH groups,respectively(P=0.215).Both 3-year overall survival[LERH(92.0%)vs OERH(84.4%),P=0.209]and 3-year disease-free survival[LERH(84.6%)vs OERH(76.6%),P=0.191]were comparable between the two groups.CONCLUSION:LERH with D3 lymphadenectomy for colon cancer is a technically feasible and safe procedure,yielding comparable short-term oncologic outcomes to those of open surgery.展开更多
Objective: To investigate the short-term efficacy of laparoscopic radical resection of right-sided colon cancer with two different surgeon positions and trocar placements. Methods: The data of 78 patients who underwen...Objective: To investigate the short-term efficacy of laparoscopic radical resection of right-sided colon cancer with two different surgeon positions and trocar placements. Methods: The data of 78 patients who underwent laparoscopic radical resection of right-sided colon cancer between January 2018 and August 2019 were retrospectively analysed. The surgical method was selected by the patients. The patients were divided into two groups according to the surgeons’ positioning habits and trocar placements. The group with the lead surgeon standing between the patient’s legs had 35 patients, and the group with the lead surgeon standing at the left side of the patient had 43 patients. The operation time, intraoperative blood loss, postoperative anal gas evacuation time, postoperative urinary catheter indwelling time, postoperative hospital stay, C-reactive protein (CRP) level on the first day after surgery, and postoperative pathological data and complications were compared between the two groups. Results: All patients underwent the laparoscopic radical resection of right-sided colon cancer, none converting to laparotomy. No significant difference (P > 0.05) in intraoperative blood loss (57.6 ± 21.3 ml vs 60.2 ± 35.3 ml), postoperative anal gas evacuation time (3.5 ± 1.1 d vs 3.8 ± 1.3 d), postoperative urinary catheter indwelling time (2.6 ± 1.3 d vs 2.4 ± 1.2 d), postoperative hospital stay (7.1 ± 1.8 d vs 7.5 ± 2.1 d), or CRP level on the first day after surgery (54.7 ± 9.6 mg/L vs 53.9 ± 8.2 mg/L) was detected between the two groups. The operation time was shorter in the group with the lead surgeon standing between the patient’s legs (185.2 ± 25.6 min vs 196.2 ±19.7 min) (P < 0.05). The two groups did not differ significantly in the tumour length (4.2 ± 1.3 cm vs 3.9 ± 1.5 cm), number of dissected lymph nodes (27.5 ± 11.6 vs 25.1 ± 15.4), pathological type, or postoperative pathological tumour-node-metastasis stage (P > 0.05). No patients died or had anastomotic fistula during their postoperative hospital stay, and the incidence of postoperative complications did not differ between the two groups (22.9% (8/35) vs 23.3% (10/42);P > 0.05). Conclusion: Under the principle of radical resection, the surgeon should adopt the most suitable standing position and trocar placement according to the specific situation. If the surgeon stands between the patient’s legs, this might shorten the operation time and promote a smoother surgery.展开更多
<strong>Background:</strong><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> Colon cancer (CC) ranks...<strong>Background:</strong><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> Colon cancer (CC) ranks as the third most common cancer worldwide and is considered the second leading cause of cancer death. Recently, many international studies have made the observation that right and left colon cancer have many significant differences regarding clinico-pathological </span></span></span><span><span><span style="font-family:;" "=""><span style="font-family:Verdana;">characteristics and primary tumor location has a crucial impact on treatment outcomes and overall survival. Our study was conducted to verify the presence of significant differences between right and left colon cancer. </span><b><span style="font-family:Verdana;">Patients and Methods: </span></b><span style="font-family:Verdana;">This study is a retrospective cohort study which aimed at comparing right and left colon cancer as regards clinico-pathological data and treatment results among patients with colon cancer receiving treatment at South Egypt Cancer Institute (SECI) during the period from 1/2008 to 12/2018. A sample size of 160 cases of colon cancer patients (80 diagnosed as right colon cancer and 80 diagnosed as left colon cancer) was randomly selected from our South Egypt Cancer Institute (SECI)’s tumor registry. Statistical analysis was done using SPSS program version 20. Difference was considered statistically significant at P-value < 0.05. Survival curves were conducted using the Kaplan-Meier methods and were compared with the log-rank test. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> Right colon cancer occurred at an older age and was more commonly presented with abdominal pain while left colon cancer was more commonly presented with bleeding manifestations. More cases of the right side underwent curative surgeries whereas more palliative surgeries were performed to left-sided cases. Left sided cases were associated with a more advanced stage at diagnosis while right-sided cases were associated with a better response to first-line chemotherapy. More cases of the left side died due to metastatic disease. On the other hand, our findings demonstrated no differences between both sides regarding gender predilection, risk factors, sites of metastases, number of metastatic organs, histo-pathological examination and grading, response to second- or third-line chemotherapy, chemotherapy toxicity (hematological or non-hematological), overall survival, progression-free survival, or disease-free survival. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> Primary tumor location of colon cancer has a significant effect on clinico-pathological characteristics and treatment outcomes.</span></span></span></span>展开更多
BACKGROUND Emergency surgical resection is a standard treatment for right-sided malignant colonic obstruction; however, the procedure is associated with high rates of mortality and morbidity. Although a bridge to surg...BACKGROUND Emergency surgical resection is a standard treatment for right-sided malignant colonic obstruction; however, the procedure is associated with high rates of mortality and morbidity. Although a bridge to surgery can be created to obviate the need for emergency surgery, its effects on long-term outcomes and the most practical management strategies for right-sided malignant colonic obstruction remain unclear.AIM To determine the appropriate management approach for right-sided malignant colonic obstruction.METHODS Forty patients with right-sided malignant colonic obstruction who underwent curative resection from January 2007 to April 2017 were included in the study.We compared the perioperative and long-term outcomes of patients who received bridges to surgery established using decompression tubes and those created using self-expandable metallic stents(SEMS). The primary outcome was the overall survival duration(OS) and the secondary endpoints were the diseasefree survival(DFS) duration and the preoperative and postoperative morbidity rates. Analysis was performed on an intention-to-treat basis.RESULTS There were 21 patients in the decompression tube group and 19 in the SEMS group. There were no significant differences in the perioperative morbidity rates of the two groups. The OS rate was significantly higher in the decompression tube group than in the SEMS group(5-year OS rate; decompression tube 79.5%,SEMS 32%, P = 0.043). Multivariate analysis revealed that the bridge to surgery using a decompression tube was significantly associated with the OS(hazard ratio, 17.41; P = 0.004). The 3-year DFS rate was significantly higher in thedecompression tube group than in the SEMS group(68.9% vs 45.9%; log-rank test,P = 0.032). A propensity score–adjusted analysis also demonstrated that the prognosis was significantly better in the decompression tube group than in the SEMS group.CONCLUSION The bridge to surgery using trans-nasal and trans-anal decompression tubes for right-sided malignant colonic obstruction is safe and may improve long-term outcomes.展开更多
BACKGROUND Right hemicolectomy or ileocecal resection are used to treat benign conditions like Crohn’s disease(CD)and malignant ones like colon cancer(CC).AIM To investigate differences in pre-and peri-operative fact...BACKGROUND Right hemicolectomy or ileocecal resection are used to treat benign conditions like Crohn’s disease(CD)and malignant ones like colon cancer(CC).AIM To investigate differences in pre-and peri-operative factors and their impact on post-operative outcome in patients with CC and CD.METHODS This is a sub-group analysis of the European Society of Coloproctology’s prospective,multi-centre snapshot audit.Adult patients with CC and CD undergoing right hemicolectomy or ileocecal resection were included.Primary outcome measure was 30-d post-operative complications.Secondary outcome measures were post-operative length of stay(LOS)at and readmission.RESULTS Three hundred and seventy-five patients with CD and 2,515 patients with CC were included.Patients with CD were younger(median=37 years for CD and 71 years for CC(P<0.01),had lower American Society of Anesthesiology score(ASA)grade(P<0.01)and less comorbidity(P<0.01),but were more likely to be current smokers(P<0.01).Patients with CD were more frequently operated on by colorectal surgeons(P<0.01)and frequently underwent ileocecal resection(P<0.01)with higher rate of de-functioning/primary stoma construction(P<0.01).Thirty-day post-operative mortality occurred exclusively in the CC group(66/2515,2.3%).In multivariate analyses,the risk of post-operative complications was similar in the two groups(OR 0.80,95%CI:0.54-1.17;P=0.25).Patients with CD had a significantly longer LOS(Geometric mean 0.87,95%CI:0.79-0.95;P<0.01).There was no difference in re-admission rates.The audit did not collect data on post-operative enhanced recovery protocols that are implemented in the different participating centers.CONCLUSION Patients with CD were younger,with lower ASA grade,less comorbidity,operated on by experienced surgeons and underwent less radical resection but had a longer LOS than patients with CC although complications'rate was not different between the two groups.展开更多
目的探讨不同入路腹腔镜手术对右半结肠癌患者肠屏障功能、红细胞免疫及预后的影响。方法选取2019年4月至2021年4月我院收治的110例右半结肠癌患者,简单随机化法分为A组(n=55)和B组(n=55),治疗期间,A组失访2例,B组失访3例,最终A组和B组...目的探讨不同入路腹腔镜手术对右半结肠癌患者肠屏障功能、红细胞免疫及预后的影响。方法选取2019年4月至2021年4月我院收治的110例右半结肠癌患者,简单随机化法分为A组(n=55)和B组(n=55),治疗期间,A组失访2例,B组失访3例,最终A组和B组分别纳入53例和52例。2组均行腹腔镜手术,A组采取头侧入路,B组采取中间入路。统计2组围手术期指标、并发症、预后及手术前后肠屏障功能(内毒素、D-乳酸、二胺氧化酶)、红细胞免疫[红细胞免疫复合物花环率(RBC-ICR)、红细胞C3b受体花环率(RBC-C3bRR)、红细胞黏附肿瘤细胞花环率(TRR)]。结果与B组相比,A组术中出血量较少,中央淋巴结清扫时间、手术时间较短,并发症发生率较低(P<0.05);术后3 d 2组内毒素、二胺氧化酶、D-乳酸水平均高于术前(P<0.05);术后3 d 2组RBC-ICR高于术前,TRR、RBC-C3bRR低于术前(P<0.05);术后1年随访,2组远处转移、局部复发、生存率比较,差异无统计学意义(P>0.05)。结论2种入路方案在右半结肠癌中效果相当,其中头侧入路腹腔镜手术可缩短手术时间,降低并发症发生率。展开更多
文摘Aim of the study is to comprehensively review the latest trends in laparoscopic complete mesocolic excision(CME) with central vascular ligation(CVL) for the multimodal management of right colon cancer. Historical and up-to-date anatomo-embryological concepts are analyzed in detail,focusing on the latest studies of the mesenteric organ,its dissection by mesofascial and retrofascial cleavage planes,and questioning the need for a new terminology in colonic resections. The rationale behind Laparoscopic CME with CVL is thoroughly investigated and explained. Attention is paid to the current surgical techniques and the quality of the surgical specimen,yielded through mesocolic,intramesocolic and muscularis propria plane of surgery. We evaluate the impact on long term oncologic outcome in terms of local recurrence,overall and disease-free survival,according to the plane of resection achieved. Conclusions are drawn on the basis of the available evidence,which suggests a pivotal role of laparoscopic CME with CVL in the multimodal management of right sided colonic cancer: performed in the right mesocolic plane of resection,laparoscopic CME with CVL demonstrates better oncologic results when compared to standard non-mesocolic planes of surgery,with all the advantages of laparoscopic techniques,both in faster recovery and better immunological response. The importance of minimally invasive mesoresectional surgery is thus stressed and highlighted as the new frontier for a modern laparoscopic total right mesocolectomy.
基金the Science and Technology Development Fund of Tianjin Education Commission for Higher Education,No.2020KJ133Tianjin Key Medical Discipline(Specialty)Construction Project,No.TJYXZDXK-009A.
文摘BACKGROUND Cyclin-dependent kinase 9(CDK9)expression and autophagy in colorectal cancer(CRC)tissues has not been widely studied.CDK9,a key regulator of transcription,may influence the occurrence and progression of CRC.The expression of auto-phagy-related genes BECN1 and drug resistance factor ABCG2 may also play a role in CRC.Under normal physiological conditions,autophagy can inhibit tumorigenesis,but once a tumor forms,autophagy may promote tumor growth.Therefore,understanding the relationship between autophagy and cancer,partic-ularly how autophagy promotes tumor growth after its formation,is a key motivation for this research.AIM To investigate the relationship between CDK9 expression and autophagy in CRC,assess differences in autophagy between left and right colon cancer,and analyze the associations of autophagy-related genes with clinical features and prognosis.METHODS We collected tumor tissues and paracarcinoma tissues from colon cancer patients with liver metastasis to observe the level of autophagy in tissues with high levels of CDK9 and low levels of CDK9.We also collected primary tissue from left and right colon cancer patients with liver metastasis to compare the autophagy levels and the expression of BECN1 and ABCG2 in the tumor and paracarcinoma tissues.RESULTS The incidence of autophagy and the expression of BECN1 and ABCG2 were different in left and right colon cancer,and autophagy might be involved in the occurrence of chemotherapy resistance.Further analysis of the rela-tionship between the expression of autophagy-related genes CDK9,ABCG2,and BECN1 and the clinical features and prognosis of colorectal cancer showed that the high expression of CDK9 indicated a poor prognosis in colorectal cancer.CONCLUSION This study laid the foundation for further research on the combination of CDK9 inhibitors and autophagy inhibitors in the treatment of patients with CRC.
文摘Right-sided colon cancers (RCC) and left-sided colon cancers (LCC) have different epidemiological, physiological, pathological, genetic, and clinical characteristics, which result in differences in the course, prognosis, and outcome of disease. The objective of our study is to compare right-sided colon cancers and left-sided colon cancers regarding clinicopathological and survival characteristics. This is a retrospective study of 664 patients with colon cancer treated at the medical oncology department of Fez over a period from December 2009 to September 2020. Rectosigmoid, descending colon, and splenic flexure tumors were considered left-sided colon cancers, whereas ascending colon tumors were considered right-sided colon cancers. The Kaplan Meier method was used to estimate median survival. The study included 664 patients (female, 47%) having colon cancer with a median age of 60 years (23 - 83). Of the patients, 78.5% (n = 519) had LCC and 19.36 % (n = 128) had RCC. The rate of patients aged ≥ 65 years and the rate of patients with a family history of colon cancer was higher in the LCC patients. The proportion of poorly differentiated adenocarcinomas represented 3%, of which 63% had cancer of the right colon. There was a significantly higher proportion of higher T stage (T3-4: 62% vs 38%) in right sided tumors as compared to left sided tumors. The rate of metastatic patients was 64.1% in the RCC group and 43% in the LCC group. The median follow-up period was 14 months in the RCC group and 19 months in the LCC group with higher median overall survival in the LCC group (32 vs 21 months). We found histopathological differences between right and left sided colon cancer. Tumors on the right colon were found to be more aggressive, as expressed by poorer differentiation, higher T stage associated with a median overall survival better in left colon cancer.
基金Supported by Grants from Key Projects in the National Science and Technology Pillar Program during the Twelfth Five-year Plan Period,No.2014BAI09B07grants from the National Natural Science Foundation of China,No.81101580 and No.81201640
文摘The colon is derived from the embryological midgut and hindgut separately,with the right colon and left colon having different features with regards to both anatomical and physiological characteristics.Cancers located in the right and left colon are referred to as right colon cancer(RCC) and left colon cancer(LCC),respectively,based on their apparent anatomical positions.Increasing evidence supports the notion that not only are there differences in treatment strategies when dealing with RCC and LCC,but molecular features also vary between them,not to mention the distinguishing clinical manifestations.Disease-free survival after radical surgery of both RCC and LCC are similar.In the treatment of RCC,the benefit gained from adjuvant FOLFIRI chemotherapy is superior,or at least similar,to LCC,but inferior to LCC if FOLFOX regimen is applied.On the other hand,metastatic LCC exhibits longer survival than that of RCC in a palliative chemotherapy setting.For KRAS wild-type cancers,LCC benefits more from cetuximab treatment than RCC.Moreover,advanced LCC shows a higher sensitivity to bevacizumab treatment in comparison with advanced RCC.Significant varieties exist at the molecular level between RCC and LCC,which may serve as the cause of all apparent differences.With respect to carcinogenesis mechanisms,RCC is associated with known gene types,such as MMR,KRAS,BRAF,and mi RNA-31,while LCC is associated with CIN,p53,NRAS,mi RNA-146 a,mi RNA-147 b,and mi RNA-1288.Regarding protein expression,RCC is related to GNAS,NQO1,telomerase activity,P-PDH,and annexin A10,while LCC is related to Topo I,TS,and EGFR.In addition,separated pathways dominate progressionto relapse in RCC and LCC.Therefore,RCC and LCC should be regarded as two heterogeneous entities,with this heterogeneity being used to stratify patients in order for them to have the optimal,current,and novel therapeutic strategies in clinical practice.Additional research is needed to uncover further differences between RCC and LCC.
文摘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.
基金Supported by National High Technology Research and Development Program of China,No.2012AA021103the Program of Guangdong Provincial Department of Science and Technology,No.2012A030400012+1 种基金the Major Program of Science and Technology Program of Guangzhou,No.201300000087the Sub-project under National Science and Technology Support Program,No.2013BAI05B00
文摘AIM:To evaluate the feasibility,safety,and oncologic outcomes of laparoscopic extended right hemicolectomy(LERH)for colon cancer.METHODS:Since its establishment in 2009,the Southern Chinese Laparoscopic Colorectal Surgical Study(SCLCSS)group has been dedicated to promoting patients’quality of life through minimally invasive surgery.The multicenter database was launched by combining existing datasets from members of the SCLCSS group.The study enrolled 220 consecutive patients who were recorded in the multicenter retrospective database and underwent either LERH(n=119)or open extended right hemicolectomy(OERH)(n=101)for colon cancer.Clinical characteristics,surgical outcomes,and oncologic outcomes were compared between the two groups.RESULTS:There were no significant differences in terms of age,gender,body mass index(BMI),history of previous abdominal surgery,tumor location,and tumor stage between the two groups.The blood loss was lower in the LERH group than in the OERH group[100(100-200)mL vs 150(100-200)mL,P<0.0001].The LERH group was associated with earlier first flatus(2.7±1.0 d vs 3.2±0.9 d,P<0.0001)and resumption of liquid diet(3.6±1.0 d vs 4.2±1.0 d,P<0.0001)compared to the OERH group.The postoperative hospital stay was significantly shorter in the LERH group(11.4±4.7 d vs 12.8±5.6 d,P=0.009)than in the OERH group.The complication rate was 11.8%and17.6%in the LERH and OERH groups,respectively(P=0.215).Both 3-year overall survival[LERH(92.0%)vs OERH(84.4%),P=0.209]and 3-year disease-free survival[LERH(84.6%)vs OERH(76.6%),P=0.191]were comparable between the two groups.CONCLUSION:LERH with D3 lymphadenectomy for colon cancer is a technically feasible and safe procedure,yielding comparable short-term oncologic outcomes to those of open surgery.
文摘Objective: To investigate the short-term efficacy of laparoscopic radical resection of right-sided colon cancer with two different surgeon positions and trocar placements. Methods: The data of 78 patients who underwent laparoscopic radical resection of right-sided colon cancer between January 2018 and August 2019 were retrospectively analysed. The surgical method was selected by the patients. The patients were divided into two groups according to the surgeons’ positioning habits and trocar placements. The group with the lead surgeon standing between the patient’s legs had 35 patients, and the group with the lead surgeon standing at the left side of the patient had 43 patients. The operation time, intraoperative blood loss, postoperative anal gas evacuation time, postoperative urinary catheter indwelling time, postoperative hospital stay, C-reactive protein (CRP) level on the first day after surgery, and postoperative pathological data and complications were compared between the two groups. Results: All patients underwent the laparoscopic radical resection of right-sided colon cancer, none converting to laparotomy. No significant difference (P > 0.05) in intraoperative blood loss (57.6 ± 21.3 ml vs 60.2 ± 35.3 ml), postoperative anal gas evacuation time (3.5 ± 1.1 d vs 3.8 ± 1.3 d), postoperative urinary catheter indwelling time (2.6 ± 1.3 d vs 2.4 ± 1.2 d), postoperative hospital stay (7.1 ± 1.8 d vs 7.5 ± 2.1 d), or CRP level on the first day after surgery (54.7 ± 9.6 mg/L vs 53.9 ± 8.2 mg/L) was detected between the two groups. The operation time was shorter in the group with the lead surgeon standing between the patient’s legs (185.2 ± 25.6 min vs 196.2 ±19.7 min) (P < 0.05). The two groups did not differ significantly in the tumour length (4.2 ± 1.3 cm vs 3.9 ± 1.5 cm), number of dissected lymph nodes (27.5 ± 11.6 vs 25.1 ± 15.4), pathological type, or postoperative pathological tumour-node-metastasis stage (P > 0.05). No patients died or had anastomotic fistula during their postoperative hospital stay, and the incidence of postoperative complications did not differ between the two groups (22.9% (8/35) vs 23.3% (10/42);P > 0.05). Conclusion: Under the principle of radical resection, the surgeon should adopt the most suitable standing position and trocar placement according to the specific situation. If the surgeon stands between the patient’s legs, this might shorten the operation time and promote a smoother surgery.
文摘<strong>Background:</strong><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> Colon cancer (CC) ranks as the third most common cancer worldwide and is considered the second leading cause of cancer death. Recently, many international studies have made the observation that right and left colon cancer have many significant differences regarding clinico-pathological </span></span></span><span><span><span style="font-family:;" "=""><span style="font-family:Verdana;">characteristics and primary tumor location has a crucial impact on treatment outcomes and overall survival. Our study was conducted to verify the presence of significant differences between right and left colon cancer. </span><b><span style="font-family:Verdana;">Patients and Methods: </span></b><span style="font-family:Verdana;">This study is a retrospective cohort study which aimed at comparing right and left colon cancer as regards clinico-pathological data and treatment results among patients with colon cancer receiving treatment at South Egypt Cancer Institute (SECI) during the period from 1/2008 to 12/2018. A sample size of 160 cases of colon cancer patients (80 diagnosed as right colon cancer and 80 diagnosed as left colon cancer) was randomly selected from our South Egypt Cancer Institute (SECI)’s tumor registry. Statistical analysis was done using SPSS program version 20. Difference was considered statistically significant at P-value < 0.05. Survival curves were conducted using the Kaplan-Meier methods and were compared with the log-rank test. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> Right colon cancer occurred at an older age and was more commonly presented with abdominal pain while left colon cancer was more commonly presented with bleeding manifestations. More cases of the right side underwent curative surgeries whereas more palliative surgeries were performed to left-sided cases. Left sided cases were associated with a more advanced stage at diagnosis while right-sided cases were associated with a better response to first-line chemotherapy. More cases of the left side died due to metastatic disease. On the other hand, our findings demonstrated no differences between both sides regarding gender predilection, risk factors, sites of metastases, number of metastatic organs, histo-pathological examination and grading, response to second- or third-line chemotherapy, chemotherapy toxicity (hematological or non-hematological), overall survival, progression-free survival, or disease-free survival. </span><b><span style="font-family:Verdana;">Conclusion:</span></b><span style="font-family:Verdana;"> Primary tumor location of colon cancer has a significant effect on clinico-pathological characteristics and treatment outcomes.</span></span></span></span>
文摘BACKGROUND Emergency surgical resection is a standard treatment for right-sided malignant colonic obstruction; however, the procedure is associated with high rates of mortality and morbidity. Although a bridge to surgery can be created to obviate the need for emergency surgery, its effects on long-term outcomes and the most practical management strategies for right-sided malignant colonic obstruction remain unclear.AIM To determine the appropriate management approach for right-sided malignant colonic obstruction.METHODS Forty patients with right-sided malignant colonic obstruction who underwent curative resection from January 2007 to April 2017 were included in the study.We compared the perioperative and long-term outcomes of patients who received bridges to surgery established using decompression tubes and those created using self-expandable metallic stents(SEMS). The primary outcome was the overall survival duration(OS) and the secondary endpoints were the diseasefree survival(DFS) duration and the preoperative and postoperative morbidity rates. Analysis was performed on an intention-to-treat basis.RESULTS There were 21 patients in the decompression tube group and 19 in the SEMS group. There were no significant differences in the perioperative morbidity rates of the two groups. The OS rate was significantly higher in the decompression tube group than in the SEMS group(5-year OS rate; decompression tube 79.5%,SEMS 32%, P = 0.043). Multivariate analysis revealed that the bridge to surgery using a decompression tube was significantly associated with the OS(hazard ratio, 17.41; P = 0.004). The 3-year DFS rate was significantly higher in thedecompression tube group than in the SEMS group(68.9% vs 45.9%; log-rank test,P = 0.032). A propensity score–adjusted analysis also demonstrated that the prognosis was significantly better in the decompression tube group than in the SEMS group.CONCLUSION The bridge to surgery using trans-nasal and trans-anal decompression tubes for right-sided malignant colonic obstruction is safe and may improve long-term outcomes.
文摘BACKGROUND Right hemicolectomy or ileocecal resection are used to treat benign conditions like Crohn’s disease(CD)and malignant ones like colon cancer(CC).AIM To investigate differences in pre-and peri-operative factors and their impact on post-operative outcome in patients with CC and CD.METHODS This is a sub-group analysis of the European Society of Coloproctology’s prospective,multi-centre snapshot audit.Adult patients with CC and CD undergoing right hemicolectomy or ileocecal resection were included.Primary outcome measure was 30-d post-operative complications.Secondary outcome measures were post-operative length of stay(LOS)at and readmission.RESULTS Three hundred and seventy-five patients with CD and 2,515 patients with CC were included.Patients with CD were younger(median=37 years for CD and 71 years for CC(P<0.01),had lower American Society of Anesthesiology score(ASA)grade(P<0.01)and less comorbidity(P<0.01),but were more likely to be current smokers(P<0.01).Patients with CD were more frequently operated on by colorectal surgeons(P<0.01)and frequently underwent ileocecal resection(P<0.01)with higher rate of de-functioning/primary stoma construction(P<0.01).Thirty-day post-operative mortality occurred exclusively in the CC group(66/2515,2.3%).In multivariate analyses,the risk of post-operative complications was similar in the two groups(OR 0.80,95%CI:0.54-1.17;P=0.25).Patients with CD had a significantly longer LOS(Geometric mean 0.87,95%CI:0.79-0.95;P<0.01).There was no difference in re-admission rates.The audit did not collect data on post-operative enhanced recovery protocols that are implemented in the different participating centers.CONCLUSION Patients with CD were younger,with lower ASA grade,less comorbidity,operated on by experienced surgeons and underwent less radical resection but had a longer LOS than patients with CC although complications'rate was not different between the two groups.
文摘目的探讨不同入路腹腔镜手术对右半结肠癌患者肠屏障功能、红细胞免疫及预后的影响。方法选取2019年4月至2021年4月我院收治的110例右半结肠癌患者,简单随机化法分为A组(n=55)和B组(n=55),治疗期间,A组失访2例,B组失访3例,最终A组和B组分别纳入53例和52例。2组均行腹腔镜手术,A组采取头侧入路,B组采取中间入路。统计2组围手术期指标、并发症、预后及手术前后肠屏障功能(内毒素、D-乳酸、二胺氧化酶)、红细胞免疫[红细胞免疫复合物花环率(RBC-ICR)、红细胞C3b受体花环率(RBC-C3bRR)、红细胞黏附肿瘤细胞花环率(TRR)]。结果与B组相比,A组术中出血量较少,中央淋巴结清扫时间、手术时间较短,并发症发生率较低(P<0.05);术后3 d 2组内毒素、二胺氧化酶、D-乳酸水平均高于术前(P<0.05);术后3 d 2组RBC-ICR高于术前,TRR、RBC-C3bRR低于术前(P<0.05);术后1年随访,2组远处转移、局部复发、生存率比较,差异无统计学意义(P>0.05)。结论2种入路方案在右半结肠癌中效果相当,其中头侧入路腹腔镜手术可缩短手术时间,降低并发症发生率。