Clinical significance of macroscopic completeness of mesorectal resection in rectal cancer

Aim Local recurrence after resection of rectal cancer is usually regarded as being due to a ‘failure’ of surgery. The completeness of resection of the mesorectum has been proposed as an indicator of the ‘quality’ of the resection. We determined the prognostic value of macroscopic evaluation of rectal cancer resection specimens and the circumferential resection margin (CRM) after curative surgery. Method From 1999 to 2006, the macroscopic quality of the mesorectum and the CRM were prospectively assessed in 127 patients who underwent rectal cancer resection with curative intent (R0+R1). Chemoradiotherapy was administered for 61 tumours staged as locally advanced tumours (T3, T4 and N+). Univariate analysis of time to local recurrence and cancer‐free survival were tested (Kaplan–Meier) and multivariate analysis calculated with a Cox regression model. Results The mesorectum was incomplete in 34 (26.8%) patients. At a median follow up of 34 months (range, 9–96 months), in the group with an adequate mesorectal excision, the cumulative risk of local recurrence at 5 years was 10%. This was 25% if the mesorectum was incomplete (P < 0.01). Five‐year cancer‐free survival was 65% if the mesorectal excision was adequate and 47% if it was not (P < 0.05). Multivariate analysis identified T status, the CRM and the mesorectal score as independent factors for local recurrence, and T and N status and the mesorectal score as independent factors for disease‐free survival. Conclusion The outcome of surgical treatment of rectal cancer is related to the completeness of mesorectal excision. It is a more discriminative prognostic factor than the classic tumour–node–metastasis (TNM) system.     

The oncological safety of laparoscopic total mesorectal excision with sphincter preservation for rectal carcinoma

Background Although experience of laparoscopic treatment of rectal carcinoma has been reported, there is no evidence of its oncological safety because most procedures included partial mesorectal excision or abdominoperineal excision and quality of surgery is lacking. The aim of this study was to assess the oncological results of laparoscopic total mesorectal excision with sphincter preservation for rectal carcinoma.Methods From 2000 to 2003, 144 patients underwent laparoscopic total mesorectal excision with low colorectal or coloanal anastomosis for mid and low rectal adenocarcinoma. There were 88 men and 56 women, with a median age of 65 years. The tumor was located at 5.5 cm (range 1–12) from the anal verge and was classified uT1T2 in 25 cases and uT3 in 119 cases. One hundred twenty patients received preoperative radiotherapy.Results Postoperative mortality and morbidity were 1% and 34% respectively. Conversion was 14% (n = 20). Macroscopic assessment of the specimen (n = 92) showed an intact mesorectum in 88% of the cases. The distal margin and the circumferential margin were safe in 98% and 94% of the cases, respectively. A complete microscopic excision, i.e., R0 resection, was achieved in 134 cases (93%). Pathological data were similar to those of an open match group. With a median follow-up of 18 months, there was no port-site recurrence and two patients had local recurrence (1.4%). The 3-year overall and disease- free survival rates were 89% and 77%, respectively.Conclusions A high quality of surgical excision can be achieved by the laparoscopic dissection, suggesting that this approach in treatment of rectal carcinoma is oncologically safe.     

T3N0 rectal cancer: Results following sharp mesorectal excision and no adjuvant therapy

Adjuvant chemoradiation therapy following resection of T3N0 rectal cancer is recommended in order to reduce the incidence of local recurrence and improve survival. However, recent experience with rectal cancer resection utilizing sharp dissection and total mesorectal excision has resulted in a reduction in local recurrence rates to as low as 5% without adjuvant treatment. The purpose of this study was to determine if rectal cancer resection utilizing sharp mesorectal excision alone is adequate treatment for local control of T3N0 rectal cancer. Between July 1986 and December 1993, 95 patients with T3N0M0 rectal cancer underwent resection with sharp mesorectal excision and did not receive any adjuvant therapy. Various prognostic factors were analyzed for their association with local recurrence and survival. Seventy-nine patients had a low anterior resection, 10 of whom had a coloanal anastomosis, and 16 had an abdominoperineal resection. The median follow-up was 53.3 months. Six patients had local recurrence, 12 had distant recurrence, and three had local and distant recurrences. The overall local recurrence rate was 9% crude and 12% 5-year actuarial. The overall crude recurrence rate was 22%. The 5-year disease-specific survival rate was 86.6% with an overall survival of 75%. Postoperative complications occurred in 18 patients (19%). Five patients (6%) had a documented anastomotic leak. Perioperative mortality was 3%. No technical factors, including type of resection (low anterior vs. abdominoperineal), location of tumor, or extent of resection margin, were significant for determining local recurrence. The only histopathologic marker significant for determining local recurrence was lymphatic invasion (P <0.04). Sharp mesorectal excision with low anterior resection or abdominoperineal resection for T3N0M0 rectal cancer results in a local recurrence rate of less than 10% without the use of adjuvant therapy. Therefore, in select patients with T3N0M0 rectal cancer, the standard use of adjuvant therapy for local control may not be justified. Presented at the Thirty-Ninth Annual Meeting of The Society of Surgery for the Alimentary Tract, New Orleans, La., May 17–20, 1998.     

Local recurrence after curative resection for rectal cancer is associated with anterior position of the tumour

BACKGROUND: Mobilization of rectal cancer can be difficult if the tumour is located anteriorly and may result in a higher incidence of local recurrence. The aim of this study was to determine whether local recurrence and survival following curative resection of rectal cancer were associated with the position of the tumour. METHODS: Data were drawn from a comprehensive, prospective hospital registry of all resections for rectal cancer from January 1990 to December 1998, with follow-up to December 2003. RESULTS: The 5-year local recurrence rate was 15.9 (95 per cent confidence interval (c.i.) 11.0 to 22.8) per cent in 176 patients with tumours that had an anterior component compared with 5.8 (95 per cent c.i. 2.8 to 11.9) per cent in 132 patients with tumours without an anterior component (P = 0.009). This association persisted after adjustment for other factors linked to local recurrence (hazard ratio (HR) 2.4 (95 per cent c.i. 1.1 to 5.4)). Similarly, anterior position had a significant negative independent association with survival (HR 1.4 (95 per cent c.i. 1.0 to 2.00)). CONCLUSION: Anterior position is an independent negative prognostic factor for both local recurrence and survival after curative resection of rectal cancer.     

Factors that influence the adequacy of total mesorectal excision for rectal cancer

OBJECTIVE: In 1997 with the start of CRO7 trial it was agreed that adequacy of surgical resection of rectal cancer would be determined by a pathologically determined grading of the mesorectum the so called total mesorectal excision score (TME score). Scores ranged from 1-3 with 3 being a perfect specimen. The aim of this study was to investigate factors which may influence TME scores and establish if local recurrence is related to them. METHOD: Data on all patients undergoing resectional surgery for rectal cancer in our unit are entered prospectively onto a database. Pathology reports of those patients who underwent total mesorectal excision were examined and the TME scores added to the database. Categorical variables were analysed using the chi2 test, continuous variables using ANOVA. Statistical significance was taken as P < 0.05. RESULTS: Between January 2000 and June 2005, 518 patients underwent surgery for adenocarcinoma of the rectum, of these, 287 patients had a total mesorectal excision for mid or lower third tumours under the care of seven colorectal surgeons. All resected specimens were scored by a Consultant GI pathologist. Two hundred and fourteen patients underwent anterior resection and 73 underwent abdomino-perineal resection. The median age of the patients was 73 years (range 38-95 years). One hundred and ninety-four patients were male. Seventy-eight patients were treated with preoperative radiotherapy, 59 short course and 19 long course. TME scores were TME1 n = 30, TME2 n = 99, TME3 n = 158. Fifteen patients developed local pelvic recurrence at 2 years. Total mesorectal excision scores were not statistically influenced by Dukes' stage, width of tumour, preoperative radiotherapy or grade of surgeon. Male patients were statistically more likely to have a TME score of 2 or 3 compared with female P = 0.04. Patients undergoing an anterior resection were statistically more likely to have a TME score of 2 or 3 compared with abdomino-perineal resection P = 0.0001.Tumours with a circumferential resection margin (CRM) of more than 1 mm were more likely to have a TME score of 2 or 3 score (P = 0.0001). There was no relationship between TME and local recurrence (P = 0.966). CONCLUSION: There is no relationship between the TME score in patients undergoing resectional surgery for adenocarcinoma of the rectum and the development of local recurrence at 2 years. Other factors such as CRM involvement are more likely to have an impact on local recurrence. The factors that influence the quality of TME are the operative procedure of anterior resection, male gender and CRM positivity. There appear to be no deleterious effects on the TME score by Specialist Registrars performing the operation under Consultant supervision. While TME scores may be an index of a technical performance, they appear to have little role in predicting future outcomes.     

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目的探讨中下段直肠癌根治性切除术后局部复发的危险因素。方法回顾性分析2001年12月至2003年7月广东省人民医院收治的行直肠系膜全切除的中下段直肠癌56例临床资料,采用病理大切片技术检测直肠系膜转移及环周切缘情况,分析其与局部复发的相关性,同时分析局部复发与临床病理特征的关系。结果中下段直肠癌根治性切除术后局部复发率为12.5%(7/56)。局部复发与肿瘤家族史(P=0.047)、血CEA水平(P=0.026)、癌性穿孔(P=0.004)、肿瘤分化程度(P=0.009)及脉管侵袭(P=0.001)密切相关。中下段直肠癌直肠系膜环周切缘阳性率为21.4%(12/56);环周切缘阳性的中下段直肠癌局部复发率为33.3%(4/12),明显高于环周切缘阴性的6.8%(3/44),两组差异有统计学意义(P=0.014)。中下段直肠癌直肠系膜转移率为64.3%(36/56);系膜转移阳性的中下段直肠癌局部复发率为16.7%(6/36),高于系膜转移阴性的5.0%(1/20),但两组差异无统计学意义(P=0.206)。结论肿瘤家族史、血CEA水平、癌性穿孔、肿瘤分化程度、脉管侵袭和环周切缘是中下段直肠癌根治性切除术后局部复发的重要因素。     

Long-term results in patients with T2-3 N0 distal rectal cancer undergoing radiotherapy before transanal endoscopic microsurgery

BACKGROUND: Local excision after radiotherapy for node-negative low rectal cancer may be an alternative to radical excision. This study evaluated the results of local excision in patients with small (less than 3 cm in diameter) T2 and T3 distal rectal tumours following neoadjuvant therapy. METHODS: One hundred patients with rectal cancer (54 uT2 and 46 uT3 uN0 tumours) were enrolled. All patients underwent preoperative radiotherapy followed by local excision by means of transanal endoscopic microsurgery. RESULTS: Definitive histological examination revealed nine pT1, 54 pT2 and 19 pT3 tumours. A complete response (R0) or microscopic residual tumour (R1mic) was found in three and 15 patients respectively. Minor complications occurred in 11 patients and major complications in two. At a median follow-up of 55 (range 7-120) months, the local failure rate was 5 per cent and metastatic disease was found in two patients. The cancer-specific survival rate at 90 months' follow-up was 89 per cent, and the overall survival rate 72 per cent. Salvage abdominoperineal resection was performed in three patients, two of whom were disease free at 15 and 19 months. CONCLUSION: Treatment of small uT2 and uT3 uN0 rectal cancers with preoperative high-dose radiotherapy followed by transanal endoscopic microsurgery is an acceptable alternative to conventional radical resection.     

Impact of total mesorectal excision on the results of surgery of distal rectal cancer.

BACKGROUND: This study reviewed the results of surgery for distal rectal cancer (tumours within 6 cm of the anal verge) following the introduction of total mesorectal excision for rectal cancer in one institution. METHODS: Two hundred and five patients who had undergone surgical resection of rectal cancer within 6 cm of the anal verge were included. The demographic, operative and follow-up data were collected prospectively. Comparisons were made between patients who had different surgical procedures. RESULTS: Abdominoperineal resection (APR) was performed in 27.8 per cent of patients, falling from 36.0 per cent in the first 3 years to 20.0 per cent in the last 3 years of the study. The overall operative mortality rate was 1.5 per cent and the morbidity rate 30.2 per cent. With a mean follow-up of 36 months, local recurrence occurred in 28 of the 185 patients who had curative resection. The 5-year actuarial local recurrence rates for double-stapled anastomosis, peranal coloanal anastomosis and APR were 11.2, 34.6 and 23.5 per cent respectively. The local recurrence rate was significantly lower for double-stapled low anterior resection than for the other types of operation. The overall 5-year survival rate in patients with low anterior resection and APR was 69.1 and 51.1 per cent respectively (P = 0.12). CONCLUSION: With the practice of total mesorectal excision, APR was necessary in only 27.8 per cent of patients with rectal cancer within 6 cm of the anal verge. The local recurrence rate was much lower in patients with double-stapled low anterior resection than in those treated with APR or peranal anastomosis.     

Abdominosacral Amputation of the Rectum for Low Rectal Cancers: Ten Years of Experience

Background  Abdominoperineal resection for rectal cancer is related to the high frequency of local recurrences, risk of inadvertent bowel perforation, and disease-positive tumor margin. An alternative technique to this procedure, however, is the abdominosacral amputation of the rectum (ASAR). The aim of this study was to report on the technique and share our experience of ASAR on the cohort of consecutively operated patients. Methods  In its anterior stage, ASAR follows the rules of total mesorectal excision. In its posterior part, the patient is positioned in a prone jackknife position and the coccyx and the last sacral vertebra (if necessary) are removed, enabling a sharp and directly visualized resection of the tumor and other structures critical to local recurrence. Between 1998 and 2007, a total of 210 low-rectal cancer patients were so treated at our clinic. Results  Bowel perforation occurred in 9 patients, the circumferential resection margin was positive in 16 patients, and 38 patients had local wound complications. Seven (4.4%) of 158 patients with 2-year follow-up developed local recurrence, whereas 5-year observed and relative survivals were 68.3% and 73.2%, respectively. Conclusions  ASAR has a low risk of bowel perforation, circumferential resection margin involvement, and local wound complications. The local recurrence rate is lower and survival better than with conventional abdominoperineal resection.     

The indication and surgical results of local excision following radiotherapy for low rectal cancer

Aim Radical surgery of rectal cancer is associated with significant morbidity, and some patients with low‐lying lesions must accept a permanent colostomy. The objective of this study was to evaluate the outcome of local excision followed by adjuvant radiotherapy for rectal cancer for curative purposes. Method One hundred and seven patients with rectal carcinoma performed with local excision were analysed retrospectively. Results The procedures of local excision were trans‐anal resection in 83 patients, trans‐sacral resection in 16, trans‐sphincteric local resection in five, and trans‐vaginal resection in three. The overall disease‐free survival rate was 80.4% (86/107), including 90.0% (54/60) for T1 and 72.3% (34/47) for T2 tumours, respectively. Eighty‐two of 107 patients underwent adjuvant postoperative radiotherapy after local excision, and 25 did not, and the DFS rates between radiation and nonradiation group were significantly different for T2 [81.6% (31/38) vs 33.3% (3/9), P < 0.05], but not for T1 tumours (90.9%vs 87.5%, P > 0.05). The rates of local recurrence and distant metastasis were 13.1% (14/107) and 4.7% (5/106), respectively, and the median time to relapse was 15 months (range: 10–53) for local recurrence and 30 months (21–65) for distant recurrence. The risk factors for local recurrence were large tumour (≥3 cm), poorly differentiated adenocarcinoma and T2 tumour. Conclusions Local excision followed adjuvant radiotherapy is an alternative and feasible technique for small T1 rectal cancer in selected cases.     

Short-term outcomes of the prone perineal approach for extra-levator abdomino-perineal excision (elAPE)

BackgroundMany studies report that low rectal cancer treated with abdomino-perineal excision (APE) have higher rates of CRM involvement with associated local recurrence and worse survival when compared to low anterior resection. We present a single surgeon’s short-term outcomes using the prone perineal extra-levator (elAPE) approach.MethodsThirty-one patients between 2006 and 2010 underwent elAPE with curative intent. Data was collected prospectively recording patient tumour characteristics and histological outcome. Outcome measures included circumferential resection margins, recurrence rates, 30-day morbidity and mortality.ResultsMean distance of tumour from anal verge was 3.63 ± SD 1.52 cm. 14 patients had pre-operative chemo-radiotherapy. The involved circumferential resection margin rate was 3.2%. Median follow-up was 20 (0–45) months, with overall mortality of 13.3% and 30 day mortality of 6.6%.ConclusionsThe prone position elAPE has a low circumferential resection margin involved rate and, through improved vision, reduces the risk of inadvertent tumour or specimen perforation.     

Local recurrence following surgical treatment for carcinoma of the lower rectum

BACKGROUND: The present paper examines the local recurrence rate following surgical treatment for carcinoma of the lower rectum with principally blunt dissection directed at tumour-specific mesorectal excision (including total mesorectal excision when appropriate). METHODS: During the period April 1987-December 1999, 123 consecutive resections for carcinoma of the middle and distal thirds of the rectum were performed. The patients had low anterior resection, ultra low anterior resection or abdomino-perineal resection. Ninety-six eligible patients underwent curative resection. The mean follow-up period was 66.8 months +/-44.3 (range 3-176 months). Data were available on all patients having been prospectively registered and retrospectively collated and computer coded. RESULTS: The overall rate of local recurrence was 5.2% (four recurrences following ultra low anterior resection and one following abdomino-perineal resection. No local recurrence occurred after low anterior resections.). Local recurrences occurred between 16 and 52 months from the time of resection, and the cumulative risk of developing local recurrence at 5 years for all patients was 7.6%. The overall 5-year cancer specific survival of the 96 patients was 80.8%, and the overall probability of being disease free at 5 years, including both local and distal recurrence, was 71.8%. CONCLUSION: The results of the present series confirm the safety of careful blunt techniques combined with sharp dissection for rectal mobilization along fascial planes resulting in extraction of an oncologic package with tumour-specific mesorectal excision (or total mesorectal excision when appropriate).     

Is low anterior resection for rectal cancer equally efficient in the hands of non-expertised surgeons?

Aim-Background

To evaluate the local recurrence rate after potentially curative low anterior resection and to determine factors influencing local recurrence.

Methods

Two hundred and sixty-nine patients were included in this retrospective clinical study. Studied variables were sex, age, location, size, grade and stage of tumour, surgical and histological clearance margins, height of vessel ligation, total mesorectal excision, number of resected and infiltrated lymph nodes and inflammatory response.

Results

Local recurrence rate was 10%. According to univariate analysis, tumours classified as advanced Astler-Coller stage or over 3 cm in size, mild inflammatory reaction, and more than three infiltrated lymph nodes increased the recurrence rate. Multivariate analysis demonstrated that age under 60, enlarged tumour size, high grade, short clearance margin, presence of infiltrated lymph nodes and mild inflammatory reaction were independent negative prognostic factors.

Conclusions

Low anterior resection is a safe and effective procedure in the hands of general surgeons without expertise in rectal surgery.     

Radiological findings do not support lateral residual tumour as a major cause of local recurrence of rectal cancer

BACKGROUND: The aim of this study was to determine the sites of local recurrence following radical (R0) total mesorectal excision (TME) for rectal cancer in an effort to elucidate the reasons for recurrence. METHODS: Thirty-seven patients with recurrence following curative resection for rectal cancer were identified from a population of 880 patients operated on by surgeons trained in the TME procedure. Two radiologists independently examined 33 available computed tomograms and magnetic resonance images taken when the recurrence was detected. RESULTS: Twenty-nine of the 33 recurrences were found in the lower two-thirds of the pelvis. Two recurrent tumours appeared to originate from lateral pelvic lymph nodes. Evidence of residual mesorectal fat was identified in 15 patients. Fourteen of the recurrent tumours originated from primary tumours in the upper rectum; all of these tumours recurred at the anastomosis and 12 of the 14 patients had evidence of residual mesorectal fat. CONCLUSION: Lateral pelvic lymph node metastases are not a major cause of local recurrence after TME. Partial mesorectal excision may be associated with an increased risk of local recurrence from tumours in the upper rectum.     

Anterior resection for rectal cancer with mesorectal excision: a prospective evaluation of 622 patients

OBJECTIVE: This study aims to review the operative results and oncological outcomes of anterior resection for rectal and rectosigmoid cancer. Comparison was made between patients with total mesorectal excision (TME) for mid and distal cancer and partial mesorectal excision (PME) for proximal cancer, when a 4- to 5-cm mesorectal margin could be achieved. Risk factors for local recurrence and survival were also analyzed. SUMMARY BACKGROUND DATA: Anterior resection has become the preferred treatment option rectal cancer. TME with sharp dissection has been shown to be associated with a low local recurrence rate. Controversies still exist as to the need for TME in more proximal tumor. METHODS: Resection of primary rectal and rectosigmoid cancer was performed in 786 patients from August 1993 to July 2002. Of these, 622 patients (395 men and 227 women; median age, 67 years) underwent anterior resection. The technique of perimesorectal dissection was used. Patients with mid and distal rectal cancer were treated with TME while PME was performed for those with more proximal tumors. Prospective data on the postoperative results and oncological outcomes were reviewed. Risk factors for anastomotic leakage, local recurrence, and survival of the patients were analyzed with univariate and multivariate analysis. RESULTS: The median level of the tumor was 8 cm from the anal verge (range, 2.5-20 cm) and curative resection was performed in 563 patients (90.5%). TME was performed in 396 patients (63.7%). Significantly longer median operating time, more blood loss, and a longer hospital stay were found in patients with TME. The overall operative mortality and morbidity rates were 1.8% and 32.6%, respectively, and there were no significant differences between those of TME and PME. Anastomotic leak occurred in 8.1% and 1.3% of patients with TME and PME, respectively (P < 0.001). Independent factors for a higher anastomotic leakage rate were TME, the male gender, the absence of stoma, and the increased blood loss. The 5-year actuarial local recurrence rate was 9.7%. The advanced stage of the disease and the performance of coloanal anastomosis were independent factors for increased local recurrence. The 5-year cancer-specific survival was 74.5%. The independent factors for poor survival were the advanced stage of the disease and the presence of lymphovascular and perineural invasion. CONCLUSIONS: Anterior resection with mesorectal excision is a safe option and can be performed in the majority of patients with rectal cancer. The local recurrence rate was 9.7% and the cancer-specific survival was 74.5%. When the tumor requires a TME, this procedure is more complex and has a higher leakage rate than in those higher tumors where PME provides adequate mesorectal clearance. By performing TME in patients with mid and distal rectal cancer, the local control and survival of these patients are similar to those of patients with proximal cancers where adequate clearance can be achieved by PME.     

腹腔镜直肠癌前切除术

基于COLOR II等研究结果,腹腔镜直肠癌手术的地位得以逐步确立。手术切除是直肠癌最重要的治疗方法,对于上段直肠癌,前切除术是标准术式;对于中下段直肠癌,需遵循全直肠系膜切除(TME)的原则,选择低位前切除术或者腹会阴联合切除术。R0切除是手术治疗的核心要素,这包括两层含义:其一是淋巴结清扫范围需要达到D2水平,其二是标本的远、近端切缘以及环周切缘均需为阴性。准确地解剖出肠系膜下动脉、左结肠动脉以及直肠上动脉,是保证淋巴清扫范围的基础,循"神圣平面"解剖分离直肠系膜是环周切缘阴性和标本完整的保证。     

Local recurrence of cancer of the rectum.

BACHGROUND: Although radiotherapy or total mesorectal excision decreases the risk of local recurrence of rectal cancer, this risk remains around 10%. METHODS: Of 80 patients having a local recurrence, 38 (48%) underwent a re-resection combined in 10 cases with resection of mestastases. RESULTS: The incidence of asymptomatic detected recurrence was higher after anterior resection (39%) than after abdominoperineal resection (18%). Re-resection was performed more often (P <0.01) in the past 2 decades after anterior or Hartman first procedure than after abdominoperineal resection (67% versus 21%), and more often in asymptomatic patients than in symptomatic patients (71% versus 38%). The actuarial 5-year survival rate after re-resection was 20%. CONCLUSIONS: Early detection of local recurrence, with PET scan using (18)F-fluorodeoxyglucose (8 cases in the present series), leads to an improved re-resection rate. In patients who did not undergo radiotherapy (all patients but 1) re-resection can be achieved safely (no postoperative mortality). The place for radiation in the treatment of rectal cancer has to be revaluated and compared with total mesorectal excision and results of re-resection for local recurrence.     

Local Recurrence following Total Mesorectal Excision with Double-stapling Anastomosis for Rectal Cancers: Analysis of Risk Factors

This study reviewed the local recurrence rate in patients who had undergone total mesorectal excision and double-stapling low anterior resection for mid and distal rectal cancers. It also aimed to identify risk factors for local recurrence through univariate and multivariate analyses. Consecutive patients with rectal cancers within 12 cm of the anal verge treated with total mesorectal excision and double-stapling low anterior resection from August 1993 to December 2000 were studied. The demographic data, operative details, tumor characteristics, and follow-up data were collected prospectively. Factors that might affect the local recurrence rate were analyzed with univariate and multivariate analyses. A total of 270 patients were included in the study (156 men, 114 women). The mean +/- SD age was 64.83 +/- 11.27 years. The mean +/- SD level of the tumor was 7.17 +/- 1.90 cm. All anastomoses were performed within 5 cm of the anal verge. During the mean follow-up of 35.5 months, 12 patients developed local recurrence. The 5-year actuarial local recurrence rate was 7.3%. The presence of lymphovascular invasion and the resection margin of < or = 1 cm were found to be risk factors for local recurrence in the univariate analysis. In the multivariate analysis, the presence of lymphovascular invasion was the only independent factor for local recurrence. In the group of patients with lymphovascular invasion, proximal tumors (6-12 cm from the anal verge) were shown to have a significantly lower local recurrence than those within 6.1 cm from the anal verge (4.2% vs. 37.8%; p <0.001). Low anterior resection performed with double stapling and total mesorectal excision achieved a local recurrence rate of 7.3%. The presence of lymphovascular invasion was the only independent risk factor for local recurrence. A high local recurrence rate was associated with distal cancers (? 6 cm from the anal verge) with lymphovascular invasion. Adjuvant therapy for local control should be considered for this subgroup of patients.     

Laparoscopic total mesorectal excision

After total mesorectal excision for rectal cancer was introduced in 1982, local recurrence rates decreased to 5%. These results were found to be reproducible; therefore, the technique became standard for the treatment of rectal cancer. Laparoscopic surgery for curable colorectal malignancy is still considered investigational. Indeed, the United States National Cancer Institute (NCI) trial excludes rectal carcinoma. The application of laparoscopy to rectal carcinoma must compete with total mesorectal excision, which has obtained favorable results in the last decade. In this review, we assess the adequacy of laparoscopic total mesorectal excision, describe the techniques (both anterior resection and abdominoperineal resection), and discuss their potential advantages.