Efficacy of postoperative adjuvant chemotherapy for colorectal cancer

We attempted postoperative adjuvant chemotherapy for stage II or III colorectal cancer. To investigate the efficacy of the adjuvant chemotherapy, we retrospectively reviewed all 293 colorectal cancer patients who underwent curative resection between 1990 and 1996 in Kurume University Hospital. The patients were divided into two groups according to whether or not they received postoperative adjuvant chemotherapy. Patients in Group 1 (n = 156) underwent resection followed by administration of oral fluorouracil. Some also received intravenous 5-FU or MMC after surgery. Patients in Group 2 (n = 95) underwent surgery alone. The disease-free survival rate in Group 1 was significantly higher than that in Group 2, but only for those with rectal cancer, with no significant difference for those with colon cancer. The results were also analyzed according to tumor stage, degree of lymphatic and venous invasion, and histological grading. Findings were similar between the two groups for those with stage II, stage IIIa, a low grade of lymphatic and venous invasion, and well-differentiated adenocarcinoma. Postoperative adjuvant chemotherapy in colorectal cancer might reduce the risk of recurrence, particularly in cases of rectal cancer. However, postoperative adjuvant chemotherapy was insufficient for those with highly advanced cancer or a biologically aggressive tumor.     

Microsatellite Instability in Sporadic Colorectal Malignancy: A Pilot Study from Northern India

Background: Three molecular pathways are described as the genetic basis of colorectal tumorigenesis. Among these, microsatellite instability (MSI) has shown greatest promise in serving as a biomarker to determine disease aggression by tumour biology, recurrence, and response to chemotherapy. Methodology: This prospective observational pilot study included patients of colorectal cancers, in a population subset coming to a tertiary care hospital in northern India, who were operated with curative or palliative intent over a period of one year and followed up for a maximum of 55 months. The post-operative pathological assessment was done for MSI status using PCR technique, and an attempt was made to evaluate its correlation with conventional clinical and histological parameters, early recurrences, disease-free survival and overall survival in comparison to MSS type tumours in sporadic cases of colorectal malignancies. Results: Out of 38 patients of colorectal cancer, 26 were included in the study. Male to female ratio was 7:6 (n=14:12). Mean age of presentation was 48±14.2 years. Incidence of MSI was n=4 (15.4%). On subgroup analysis, age of presentation (p=0.044) and evidence of perineural invasion (p=0.017) was found to have significant statistical association with MSI tumour biology. Recurrence was seen in seven of the seventeen patients who previously had no synchronous or metastatic disease (41.2%). The mean disease-free survival for MSS was 21.32 months and was 25.25 months for MSI group which was statistically insignificant (p = 0.277). Out of four MSI tumour biology patients one was alive and without recurrence at 47 months. While the other two were alive and without recurrence till 27 months of follow-up.   Conclusion: Age and perineural invasion showed statistically significant association with MSI tumour biology. Due to the small sample size statistical significance was not established with site, recurrence rate, DFS and OS.     

Clinicopathological Characteristics and Prognosis of Patients According to Recurrence Time After Curative Resection for Colorectal Cancer

Purpose: To investigate clinicopathological features in patients with recurrent colorectal cancer within 1 yearand more than 1 year after curative resection. Materials and Methods: We retrospectively evaluated 103 patientswith disease recurrence before versus after 1 year of resection. Thirty-two patients (31%) were diagnosed withrecurrence less than 1 year after curative resection for colorectal cancer (early recurrence) and 71 (69%) after morethan 1 year (non-early recurrence). Results: The early recurrence group displayed a significantly lower overallsurvival rate for both colon cancer (p=0, 01) and rectal cancer (p<0.001). Inadequate lymph node dissection wasa significant predictor for early relapse. There were no statistically significant differences in clinicopathologicalvariables such as age, sex, primary tumor localization, stage, depth of invasion, lymphovascular invasion andperineural invasion between the early and non-early recurrence groups. However, a K-ras mutation subgroupwas significantly associated with early recurrence (p<0.001). Conclusions: Poor survival is associated with earlyrecurrence for patients undergoing resection for non-metastatic colorectal cancer, as well as K-ras mutation.     

The influence of invasive growth pattern and microvessel density on prognosis in colorectal cancer and colorectal liver metastases

The nature of the invasive growth pattern and microvessel density (MVD) have been suggested to be predictors of prognosis in primary colorectal cancer (CRC) and colorectal liver metastases. The purpose of the present study was to determine whether these two histological features were interrelated and to assess their relative influence on disease recurrence and survival following surgical resection. Archival tissue was retrieved from 55 patients who had undergone surgical resection for primary CRC and matching liver metastases. The nature of the invasive margin was determined by haematoxylin and eosin (H&E) histochemistry. Microvessel density was visualised using immunohistochemical detection of CD31 antigen and quantified using image capture computer software. Clinical details and outcome data were retrieved by case note review and collated with invasive margin and MVD data in a statistical database. Primary CRCs with a pushing margin tended to form capsulated liver metastases (P<0.001) and had a significantly better disease-free survival than the infiltrative margin tumours (log rank P=0.01). Primary cancers with a high MVD tended to form high MVD liver metastases (P=0.007). Microvessel density was a significant predictor of disease recurrence in primary CRCs (P=0.006), but not liver metastases. These results suggest that primary CRCs and their liver metastases show common histological features. This may reflect common mechanisms underlying the tumour-host interaction.     

Isolated paraaortic lymph-node recurrence after the curative resection of colorectal carcinoma

BACKGROUND AND OBJECTIVES: Isolated paraaortic lymph-node recurrence (IPLR) after curative surgery for colorectal carcinoma is rare and no previous report has specifically addressed this type of recurrence. We investigated the clinical features of IPLR and analyzed prognostic factors. METHODS: Of 2,916 patients who underwent curative surgery for colorectal carcinoma, IPLR was identified in 38 patients (1.3%). The clinical features and prognostic factors of these patients were analyzed. RESULTS: IPLR was first detected by increased serum carcinoembryonic antigen (CEA) levels (63.2%) or by routine follow-up computed tomography (CT) (36.8%). Curative resection of IPLR was performed in six patients (15.8%). A total of 19 patients (50.0%) received chemoradiation therapy and 13 patients (34.2%) received chemotherapy only. The median survival from IPLR was 13 months (range: 5-60 months). The median survival time from IPLR for the resected patients was 34 months, whereas it was 12 months for those who did not undergo resection (P = 0.034). The factors associated with the prognosis were histological grade (P = 0.003), location (P = 0.032), and resection of IPLR (P = 0.034). CONCLUSIONS: IPLR after curative surgery for colorectal carcinoma is rare. Although it is generally associated with poor prognosis, better survival might be achieved through curative resection in selected cases.     

C-reactive protein as a predictor of prognosis following curative resection for colorectal liver metastases

There is increasing evidence that systemic inflammatory response has a positive correlation with a poorer outcome in patients undergoing resection for solid tumours. The aim of this study was to analyse the impact of an elevated C-reactive protein (CRP), an outcome following curative resection for colorectal liver metastases. One hundred and seventy patients who underwent curative resection for colorectal liver metastases were included in the study. Laboratory measurements of haemoglobin, white cell, platelets, albumin and CRP were taken on the day before surgery. Elevated CRP (>10 mg l(-1)) was present in 54 (31.8%) patients. The median survival of patients with an elevated CRP was 19 months (95% CI 7.5-31.2 months) compared to 42.8 months (95% CI 33.2-52.5 months) for those with a normal CRP, P=0.004. Similarly, when assessing disease-free survival, patients with an elevated CRP had poorer disease-free survival (median of 11.8 months (95% CI 6.4-17.3) compared to median of 15.1 months (95% CI 11.1-19.1)), P=0.043. The result of the study showed that an elevated preoperative CRP is a predictor of poor outcome in patients undergoing curative resection for colorectal liver metastases.     

The presence of a systemic inflammatory response predicts poorer survival in patients receiving adjuvant 5-FU chemotherapy following potentially curative resection for colorectal cancer

There is increasing evidence that the presence of a systemic inflammatory response plays an important role in survival following curative resection for colorectal cancer. The present study evaluated the relationship between C-reactive protein concentrations and survival in a cohort of patients receiving adjuvant 5-fluorouracil (5-FU) chemotherapy following potentially curative resection for colorectal cancer. In all, 222 patients undergoing potentially curative resection for colorectal cancer were studied. Of these, 50 patients received adjuvant 5-FU-based chemotherapy. Circulating concentrations of C-reactive protein were measured prior to surgery. The minimum follow-up was 15 months; the median follow-up of the survivors was 38 months. During this period 61 patients died, 32 patients of their cancer and 29 of intercurrent disease. In those patients who did not receive adjuvant chemotherapy, age (P < 0.001), Dukes stage (P < 0.05) and an elevated C-reactive protein (P < 0.01) were significantly associated with survival. In those patients who did receive adjuvant chemotherapy, an elevated C-reactive protein concentration (P < 0.01) was significantly associated with survival. The presence of a systemic inflammatory response is an independent predictor of poor outcome in patients receiving adjuvant 5-FU-based chemotherapy following potentially curative resection for colorectal cancer.     

The MMP-9 expression determined the efficacy of postoperative adjuvant chemotherapy using oral fluoropyrimidines in stage II or III colorectal cancer

Background: The aim of this study was to determine any correlation between the efficacy of postoperative adjuvant chemotherapy using oral fluoropyrimidines and the matrix metalloproteinase 9 (MMP-9) expression in primary colorectal cancer tissues. Patients and Methods: The data on 307 patients with colorectal cancer at stage II or III, who underwent potentially curative resection with lymphadenectomy, were reviewed. Of these, 188 received postoperative administration of oral fluoropyrimidines such as UFT and 5′-DFUR (chemotherapy group), while the other 119 patients underwent surgery alone (surgery-alone group). Immunostaining for MMP-9 was performed using surgical specimens of all 307 primary tumors and 18 recurrent tumors. Results: Overall, MMP-9 was positively expressed in the primary tumor in 44% of patients. Multivariate analysis revealed that the MMP-9 expression was a worse prognostic factor with a second highest hazard ratio for recurrence. The disease-free survival rate in the chemotherapy group was significantly higher than that in the surgery-alone group. However, no significant difference in disease-free survival rate between the two groups was found in patients with a tumor positive for MMP-9. There was a strong positive correlation of MMP-9 expression between the primary tumors and the recurrent liver or lung tumors. Conclusions: The efficacy of postoperative adjuvant chemotherapy using oral fluoropyrimidines such as UFT and 5′-DFUR may not be as great for patients with a tumor positive for MMP-9 having a greater risk to postoperative recurrence. Ogata Y, et al. The efficacy of MMP inhibitor MMI270 against lung metastasis following removal of orthotopically transplanted human colon cancer. I J Cancer, 2005 (in press)     

The expression of vascular endothelial growth factor determines the efficacy of post-operative adjuvant chemotherapy using oral fluoropyrimidines in stage II or III colorectal cancer

The aim of this study was to determine any correlation between the efficacy of post-operative adjuvant chemotherapy using oral fluoropyrimidines and the vascular endothelial growth factor (VEGF) expression in primary colorectal cancer tissues. The data were reviewed retrospectively on 342 patients with colorectal cancer at stage II or III, who underwent potentially curative resection between 1988 and 1998. Of these, 225 received post-operative administration of oral fluoropyrimidines such as UFT and 5'-DFUR, while the other 117 patients underwent surgery alone. Immunostaining for VEGF was performed using colorectal tumours. Overall, VEGF was positively expressed in primary tumour cells in 48% of patients. The disease-free survival rate and the overall survival rate in the chemotherapy group were higher than those in the surgery-alone group, although not significantly. However, the disease-free survival rate and the overall survival rate were similar between the two groups in patients with a tumour positive for VEGF. Multivariate analysis revealed that the VEGF expression was an independent factor for post-operative recurrence, and the VEGF expression and post-operative adjuvant chemotherapy were an independent factor for overall survival, in addition to the lymph node metastasis and the venous invasion. In conclusion, the efficacy of post-operative adjuvant chemotherapy using oral fluoropyrimidines may not be as great for patients with a tumour positive for VEGF having a greater risk of post-operative recurrence. The results support further investigation on efficacy of molecular targeting therapy for VEGF in combination with oral fluoropyrimidines as post-operative adjuvant therapy in colorectal cancer positive for VEGF.     

可切除结直肠癌肺转移的预后因素分析

目的 探讨结直肠癌肺转移根治性切除术后的预后影响因素.方法 回顾性分析行根治性切除术的60例结直肠癌肺转移患者的临床资料.结果 全组患者肺转移瘤切除术后和结直肠癌切除术后的5年生存率分别为43.7%和74.0%.单因素分析结果显示,肺转移瘤数目和无瘤间期与结直肠癌术后患者的总生存率有关(均P＜0.05),肺转移瘤切除前癌胚抗原(CEA)水平、肺转移瘸数目、有无肺门和纵隔淋巴结转移与肺转移瘤切除术后患者的生存率有关(均P＜0.05).多因素分析结果显示,肺转移瘤数目和无瘤间期是结直肠癌术后患者预后的独立影响因素(OR=2.691,95% CI为1.072～6.754;OR=0.979,95% CI为0.963～0.994),肺转移瘤数目、有无肺门和纵隔淋巴结转移是肺转移瘤切除术后患者预后的独立影响因素(OR=3.319,95% CI为1.274～8.648;OR=3.414,95% CI为1.340～8.695).结论 经过严格选择的结直肠癌肺转移患者,尤其是单发肺转移及无肺门和纵隔淋巴结转移的患者,行根治性切除术后可获得长期生存.     

Neoadjuvant Chemotherapy Prior to Resection of Colorectal Liver Metastases

Surgery is the reference treatment of resectable colorectal liver metastases (CLM) as it is associated with 5-year survival rate as high as 50?% in selected patients. Unfortunately, most patients have too advanced metastatic disease to undergo liver resection with curative intent and are therefore treated by systemic chemotherapy. In patients undergoing resection of CLM, disease recurrence can occur in up to 70?% and consequently, adjuvant treatment to surgery have been tested to improve oncologic outcome. In patients with unresectable CLM, chemotherapy is initially the sole treatment option. The considerable improvement of the efficacy of anticancer agents has contributed to increase the response rate in patients with advanced colorectal cancer. In case of major response to chemotherapy, surgery with curative intent can be offered to patients with initially unresectable liver metastases.     

Dukes B期大肠癌患者术后辅助化疗的疗效评价

目的：探讨Dukes B期大肠癌患者根治性手术后辅助化疗的疗效及安全性。方法：选取102例已行根治手术的Dukes B期大肠癌患者进行分析。结果：辅助化疗组和单纯手术组患者3年无瘤生存率分别为80．0％和62．5％（P=0．019）；5年生存率分别为89．9％和66．7％（P=0．0129）。FCF辅助化疗的不良反应为食欲不振、恶心呕吐、脱发和局部色素沉着．多为1～2度。结论：Dukes B期大肠癌根治术后给予FCF方案辅助化疗能够提高患者3年无瘤生存率和5年生存率；3度不良反应发生率低、安全性好，患者耐受性好。     

Simultaneous curative resection of double colorectal carcinoma with synchronous bilobar liver metastases

Synchronous colorectal carcinoma (SCRC) indicates more than one primary colorectal carcinoma (CRC) discovered at the time of initial presentation, accounts for 3.1%-3.9% of CRC, and may occur either in the same or in different colorectal segments. The accurate preoperative diagnosis of SCRC is difficult and diagnostic failures may lead to inappropriate treatment and poorer prognosis. SCRC requires colorectal resections tailored to individual patients, based on the number, location, and stage of the tumours, from conventional or extended hemicolectomies to total colectomy or proctocolectomy, when established predisposing conditions exist. The overall perioperative risks of surgery for SCRC seem to be higher than for solitary CRC. Simultaneous colorectal and liver resection represents an appealing surgical strategy in selected patients with CRC and synchronous liver metastases (CRLM), even though the cumulative risks of the two procedures need to be adequately evaluated. Simultaneous resections have the noticeable advantage of avoiding a second laparotomy, give the opportunity of an earlier initiation of adjuvant therapy, and may significantly reduce the hospital costs. Because an increasing number of recent studies have shown good results, with morbidity, perioperative hospitalization, and mortality rates comparable to staged resections, simultaneous procedures can be selectively proposed even in case of complex colorectal resections, including those for SCRC and rectal cancer. However, in patients with multiple bilobar CRLM, major hepatectomies performed simultaneously with colorectal resection have been associated with significant perioperative risks. Conservative or parenchymal-sparing hepatectomies reduce the extent of hepatectomy while preserving oncological radicality, and may represent the best option for selected patients with multiple CRLM involving both liver lobes. Parenchymal-sparing liver resection, instead of major or two-stage hepatectomy for bilobar disease, seemingly reduces the overall operative risk of candidates to simultaneous colorectal and liver resection, and may represent the most appropriate surgical strategy whenever possible, also for patients with advanced SCRC and multiple bilobar liver metastases.     

Surgical resection of hepatic metastases from colorectal cancer: a systematic review of published studies

No consensus on the indications for surgical resection of colorectal liver metastases exists. This systematic review has been undertaken to assess the published evidence for its efficacy and safety and to identify prognostic factors. Studies were identified by computerised and hand searches of the literature, scanning references and contacting investigators. The outcome measures were overall survival, disease-free survival, postoperative morbidity and mortality, quality of life and cost effectiveness, and a qualitative summary of the trends across all studies was produced. Only 30 of 529 independent studies met all the eligibility criteria for the review, and data on 30-day mortality and morbidity only were included from a further nine studies. The best available evidence came from prospective case series, but only two studies reported outcomes for all patients undergoing surgery. The remainder reported outcomes for selected groups of patients: those undergoing hepatic resection or those undergoing curative resection. Postoperative mortality rates were generally low (median 2.8%). The majority of studies described only serious postoperative morbidity, the most common being bile leak and associated perihepatic abscess. Approximately 30% of patients remained alive 5 years after resection and around two-thirds of these are disease free. The quality of the majority of published papers was poor and ascertaining the benefits of surgical resection of colorectal hepatic metastases is difficult in the absence of randomised trials. However, it is clear that there is group of patients with liver metastases who may become long-term disease-free survivors following hepatic resection. Such survival is rare in apparently comparable patients who do not have surgical treatment. Further work is needed to more accurately define this group of patients and to determine whether the addition of adjuvant treatments results in improved survival.     

The clinicopathological significance of inferior mesenteric lymph node metastasis in colorectal cancer.

AIMS: There are few studies reporting survival or recurrence patterns in colorectal cancer patients with inferior mesenteric lymph node metastasis (IMLN+). The present study evaluated the prognostic significance of patients being IMLN+ or IMLN- in colorectal cancer. METHODS: Survival, recurrence pattern and treatment protocols were compared between 63 IMLN+ patients and 108 IMLN- patients with stage III and IV rectal and sigmoid cancer undergoing curative surgery. Lymph node sampling was routinely performed prior to inferior mesenteric artery ligation and excision flush with aorta. Limited principal node dissection including IMLN was performed in cases of identified node metastasis. RESULTS: The 5-year disease-free survival rates were 50% in IMLN- and 31% in IMLN+ patients (P=0.004). The 5-year disease-free survival rate was greater in the N1 group than the N2 group (P=0.038). Cox regression analysis showed IMLN+, lymphovascular tumour invasion, T4, M1, and pre-operative serum CEA level over 6 ng/ml were independently associated with unfavorable disease-free survival. The prognostic significance of M category was greater when the IMLN+ was included in the M1 as opposed to the N category. In patients undergoing absolute curative surgery, post-operative recurrence rates were 34% for IMLN- and 57% for IMLN+ patients (P=0.009; OR, 2.611; 95% CI, 1.313-5.194). For IMLN+ patients, post-operative adjuvant treatment independently correlated with disease-free survival (P=0.029). CONCLUSIONS: IMLN+ is an independent survival factor enhancing the prognostic significance of the M category in the AJCC staging. Curative radical surgery and post-operative chemoradiotherapy appears to be warranted for IMLN+ colorectal cancer patients as it resulted in 5-year disease-free survival rates of up to 31% compared to 50% in IMLN- patients.     

Evaluation of sialyl Lewis(a), sialyl Lewis(x), and sialyl Tn antigens expression levels as predictors of recurrence after curative surgery in node-negative colorectal cancer patients

This study aimed to determine whether sialyl Lewis(a) (Le(a)), sialyl Lewis(x )(Le(x)), or sialyl Tn antigen expression could identify a subset of node-negative colorectal cancer patients that are at high risk for recurrence after curative surgery. Tumor tissue samples from 90 patients with node-negative colorectal cancer, who had undergone surgical resection, were analyzed immunohistochemically for the expression of each antigen. Patients were classified as having low or high antigen expression depending on whether more or less than 40% of the field showed positive staining. The main outcome measure for each variable was disease-free interval. Sialyl Le(a), sialyl Le(x), and sialyl Tn antigens were expressed in 53 (58.9%), 41 (45.6%), and 34 (37.8%) carcinomas, respectively. The median follow-up was 83.5 months. Patients with high sialyl Le(x) expression had shorter disease-free intervals than those with low sialyl Le(x) expression (P = 0.0041); the expression of sialyl Le(a) or sialyl Tn antigens did not show a significant relationship with disease-free survival. Cox's regression analysis revealed that sialyl Le(x) expression was an independent predictor for disease-free survival, separate from T factor or tumor location. High sialyl Le(x) expression may be useful in identifying a subset of node-negative colorectal cancer patients who are at high risk for recurrence.     

Survivin在结直肠癌中的表达及其临床意义

目的:探讨结直肠癌组织中凋亡抑制因子Survivin的表达及其与各临床病理因素的关系,评价Survivin在结直肠癌预后判断中的价值。方法:应用组织芯片结合免疫组织化学SABC法,检测126例结直肠癌组织中Survivin的表达情况,分析Survivin与各临床病理因素及预后之间的关系。结果:根据免疫组化染色强度和分级结果,所有病例被分为Survivin高表达组和低表达组。其中高表达组有26例(26/126,20·6%),低表达组有100例(100/126,79·4%)。Survivin在结直肠癌中表达情况与年龄、性别、肿瘤大小、肿瘤部位、组织学类型、浸润深度、淋巴是否转移和Dukes分期均无显著相关。然而,高表达的Survivin与肿瘤复发、特别是血行转移显著相关,P<0·05。Survivin高表达组和低表达组的生存率用Kaplan-Meier方法评估,并用log-rank test进行比较,两组之间生存率差异具有统计学意义,P<0·05。多因素分析结果显示,在潜在的预后因素中(年龄、性别、肿瘤大小、肿瘤部位、组织学类型、淋巴是否转移和Dukes分期、Survivin表达),Survivin表达和Dukes分期被认为是结直肠癌根治术后独立预后因素。结论:Survivin的表达与结直肠癌的术后复发相关:结直肠癌术后复发率在Survivin高表达组明显高于Survivin低表达组,是与预后相关的独立危险因子。应用组织芯片高效检测临床组织样本具有快速、方便、经济、准确的优点。     

Long-term prognostic value of conventional peritoneal cytology after curative resection for colorectal carcinoma

BACKGROUND: This study was undertaken to evaluate the long-term prognostic significance of conventional peritoneal cytology in patients with advanced colorectal carcinoma after curative resection. METHODS: A review was performed of 189 patients who underwent curative resection for pT3/T4 carcinoma of the colon and upper/middle rectum between March 1987 and December 1991. Patient outcomes were reviewed retrospectively. Peritoneal cytology was performed before manipulation of the tumor. Intraoperatively, 50 ml of saline were instilled and 20 ml were reaspirated for cytology. In all patients, Papanicolaou and Giemsa stainings were performed to detect intraperitoneal free tumor cells. RESULTS: The median follow-up was 103 months. Malignant cells were identified in peritoneal washings from 11 patients (5.8%). Of the 11 patients with positive cytology, six (54.5%) developed recurrence and peritoneal recurrence was observed in four (36.4%). In contrast, of the 178 patients with negative cytology, 46 (25.8%) developed recurrence and peritoneal recurrence was observed in four (2.2%). The peritoneal recurrence rate was significantly increased (P = 0.0004) in the patients with positive cytology. The cancer-specific 10-year survival rates for the patients with positive and negative cytology were 45.5 and 80.3%, respectively (P = 0.0051). Multivariate analysis (Cox proportional hazard model) revealed that peritoneal cytology (positive: P = 0.0256) and lymph node metastasis (pN2: P = 0.0004) were independent predictors of cancer-specific survival. CONCLUSION: Conventional peritoneal cytology serves as a new prognostic marker after curative resection in patients with advanced colorectal carcinoma. It appears to be a useful diagnostic procedure for predicting recurrence, especially peritoneal recurrence.     

Survivin在Dukes''''C期结直肠癌中的表达及其生物学意义

目的:探讨Survivin在Dukes'C期结直肠癌中的表达情况及其对辅助化疗疗效的预测作用.方法:应用免疫组化法检测85例根治性术后,行标准辅助化疗的Dukes'C期结直肠癌患者的癌组织和14例正常结直肠组织中Survivin的表达,分析与临床病理因素的相关性,并进行生存分析.结果:肿瘤组织Survivin阳性率为51.76%,正常组织中无Survivin表达,两组阳性率差异有显著性(P＜0.05).Survivin的表达与患者的年龄、性别、病程、肿瘤部位、肿瘤最大径、大体类型、组织分型、分化程度、肠壁浸润深度、淋巴结转移部位之间均无显著相关性(P均＞0.05).Survivin蛋白的表达与肿瘤的复发转移显著相关,Survivin阳性者复发转移率54.52%,显著高于Survivin阴性者(26.83%)(P=0.009).Survivin阳性患者3年、5年无病生存率和总生存率显著低于阴性患者,Cox模型多因素分析,Survivin是影响肿瘤复发转移和生存的独立的预后因素.结论:Survivin在Dukes'C期结直肠癌中表达上调,与辅助化疗的疗效相关,可作为预测辅助化疗疗效的分子指标.     

Evaluation of prophylactic hepatic arterial infusion chemotherapy after curative hepatectomy for metastatic colorectal cancer

We evaluated the effect of hepatic arterial infusion (HAI) chemotherapy after curative resection of liver metastases of colorectal cancer. A total of 161 patients underwent curative resection of liver metastases. Among them, 50 patients underwent HAI of 5-FU, and 111 patients had no HAI therapy. The 50% disease-free survival time (50% DFS) was 758 days and 342 days in the HAI group and the non-HAI group (logrank test, p<0.01), and the 50% overall survival time (50% OS) was 978 days versus 730 days (p<0.05), respectively. Among the 71 patients with multiple resectable metastases (H2 or H3), the HAI group had a significantly superior 50% DFS. HAI therapy seems to be an effective form of adjuvant chemotherapy after hepatic resection of metastatic colorectal cancer.