Current status of total mesorectal excision and autonomic nerve preservation in rectal cancer

Management of the adenocarcinoma of the upper rectum: a reappraisal

The present review attempts to assess whether upper rectal cancer (URC) should be treated either as colon cancer or as rectal one, namely to be managed with upfront surgery without neo-adjuvant treatment and partial mesorectal excision (PME), or with neo-adjuvant short course radiotherapy (SCRT) or chemoradiotherapy (CRT) as indicated, followed by surgery with total mesorectal excision. Reports from current evidence including studies, reviews and various guidelines are conflicting. Main reasons for inability to reach safe conclusions are (i) the various anatomical definitions of the rectum and its upper part, (ii) the inadequate preoperative local staging,(iii) the heterogeneity of selection criteria for the neo-adjuvant treatment,(iv) the different neo-adjuvant treatment regimens, and(v) the variety in the extent of surgical resection, among the studies. Although not adequately supported, locally advanced URC can be treated with neo-adjuvant CRT provided the lesion is within the radiation field of safety, and a PME if the lower border of the tumour is located above the anterior peritoneal reflection. There is evidence that adjuvant chemotherapy is of benefit in high-risk stage II and stage III lesions.

Impact on sexual function of surgical treatment in rectal cancer

INTRODUCTION

The development of new surgical techniques and medical devices, like therapeutical multimodal approaches has allowed for better outcomes on patients with rectal cancer (RCa). Owing to that, an increased awareness and investment towards better outcomes regarding patients' sexual and urinary function has been recently observed.

AIM

Evaluate and characterize the sexual dysfunction of patients submitted to surgical treatment for RCa.

MATERIALS AND METHODS

An observational retrospective study including all male patients who underwent a surgical treatment for RCa between January 2011 December 2014 (n=43) was performed, complemented with an inquiry questionnaire to every patient about its sexual habits and level of function before and after surgery.

DISCUSSION

All patients were male, with an average of 64yo. (range 42-83yo.). The surgical procedure was a rectum anterior resection (RAR) in 22 patients (56%) and an abdominoperineal resection (APR) in 19(44%). Sixty three percent described their sexual life as important/very important. Sexual function worsening was observed in 76% (65% with complains on erectile function, and 27% on ejaculation). Fourteen patients (38%) didn't resume sexual activity after surgery. Increased age (p=0.007), surgery performed (APR) (p=0.03) and the presence of a stoma (p=0.03) were predictors of ED after surgery. A secondary analysis found that the type of surgery (APR) (p=0.04), lower third tumor's location (p=0.03) and presence of comorbidities (p=0.013) (namely, smokers and diabetic patients) were predictors of de novo ED after surgery.

CONCLUSIONS

This study demonstrated the clear negative impact in sexual function of patients submitted to a surgical treatment for RCa. Since it is a valued feature for patients, it becomes essential to correctly evaluate/identify these cases in order to offer an adequate therapeutical option.

Inspection of Perirectal Lymph Nodes by One-Step Nucleic Acid Amplification Predicts Lateral Lymph Node Metastasis in Advanced Rectal Cancer

BACKGROUND

Lateral lymph node dissection (LLND) is performed for advanced rectal cancers in Japan; however, it can cause sexual and urinary dysfunction. The incidence of lateral LN metastasis is estimated at 7-13.9%; therefore, excessive rectal surgery with LLND should be avoided, especially for prophylactic purposes. To identify the patients who require LLND, we examined metastases in perirectal LNs by using a one-step nucleic acid amplification (OSNA) assay to predict lateral LN metastases.

METHODS

Twenty-five patients who underwent surgery with bilateral LN dissection due to T3-T4 rectal cancers were prospectively included in this study. Twenty-two patients (88.0%) received preoperative chemotherapy. Among 1052 LNs from 25 patients (median 40 per case), 135 perirectal LNs (median 6 per patient) were divided into three pieces and analyzed by OSNA, reverse transcriptase-polymerase chain reaction for carcinoembryonic antigen mRNA, and pathological examination after surgery. These results were compared with the pathological diagnosis of lateral LNs.

RESULTS

Lateral LN metastases were present in 4 of 25 patients (16.0%). All of these patients were positive by OSNA for perirectal LN metastases. The OSNA assay had a sensitivity of 100%, specificity of 86%, positive predictive value of 57%, and negative predictive value (NPV) of 100% for predicting lateral LN metastases.

CONCLUSIONS

The findings from this prospective study suggest that the OSNA assay of perirectal LNs may be useful for determining when LLND is necessary because of its high NPV, even in patients treated with preoperative chemotherapy.

Mesorectal Excision With or Without Lateral Lymph Node Dissection for Clinical Stage II/III Lower Rectal Cancer (JCOG0212): A Multicenter, Randomized Controlled, Noninferiority Trial

OBJECTIVE

The aim of the study was to confirm the noninferiority of mesorectal excision (ME) alone to ME with lateral lymph node dissection (LLND) in terms of efficacy.

BACKGROUND

Lateral pelvic lymph node metastasis is occasionally found in clinical stage II or III lower rectal cancer, and ME with LLND is the standard procedure in Japan. ME alone, however, is the international standard surgical procedure for rectal cancer.

METHODS

Eligibility criteria included histologically proven rectal cancer at clinical stage II/III; main lesion located in the rectum, with the lower margin below the peritoneal reflection; no lateral pelvic lymph node enlargement; Peformance Status of 0 or 1; and age 20 to 75 years. Patients were intraoperatively allocated to undergo ME with LLND or ME alone in a randomized manner. The primary endpoint was relapse-free survival, with a noninferiority margin for the hazard ratio of 1.34. Secondary endpoints included overall survival and local-recurrence-free survival. Analysis was by intention to treat.

RESULTS

In total, 701 patients were randomized to the ME with LLND (n = 351) and ME alone (n = 350) groups. The 5-year relapse-free survival in the ME with LLND and ME alone groups were 73.4% and 73.3%, respectively (hazard ratio: 1.07, 90.9% confidence interval 0.84-1.36), with a 1-sided P value for noninferiority of 0.0547. The 5-year overall survival, and 5-year local-recurrence-free survival in the ME with LLND and ME alone groups were 92.6% and 90.2%, and 87.7% and 82.4%, respectively. The numbers of patients with local recurrence were 26 (7.4%) and 44 (12.6%) in the ME with LLND and ME alone groups, respectively (P = 0.024).

CONCLUSIONS

The noninferiority of ME alone to ME with LLND was not confirmed in the intent-to-treat analysis. ME with LLND had a lower local recurrence, especially in the lateral pelvis, compared to ME alone.

Male urinary and sexual function after robotic pelvic autonomic nerve-preserving surgery for rectal cancer

BACKGROUND

Urinary and sexual dysfunction is the potential complication of rectal cancer surgery. The aim of this study was to evaluate the urinary and sexual function in male patients with robotic surgery for rectal cancer.

METHODS

This prospective study included 137 of the 336 male patients who underwent surgery for rectal cancer. Urinary and male sexual function was studied by means of a questionnaire based on the International Prostatic Symptom Score and International Index of Erectile Function. All data were collected before surgery and 12 months after surgery.

RESULTS

Patients who underwent robotic surgery had significantly decreased incidence of partial or complete erectile dysfunction and sexual dysfunction than patients with laparoscopic surgery. The pre- and post-operative total IPSS scores in patients with robotic surgery were significantly less than that with laparoscopic surgeries.

CONCLUSIONS

Robotic surgery shows distinct advantages in protecting the pelvic autonomic nerves and relieving post-operative sexual dysfunction.

Laparoscopic Low Anterior Resection and Eversion Technique Combined With a Nondog Ear Anastomosis for Mid- and Distal Rectal Neoplasms: A Preliminary and Feasibility Study

The transanal eversion and prolapsing technique is a well-established procedure, and can ensure an adequate distal margin for patients with low rectal neoplasms. Potential leakage risks, however, are associated with bilateral dog ear formation, which results from traditional double-stapling anastomosis. The authors determined the feasibility of combining these techniques with a commercial stapling set to achieve a nondog ear (end-to-end) anastomosis for patients with mid- and distal rectal neoplasms. Patients with early-stage (c/ycT1-2N0), mid- to distal rectal neoplasms and good anal sphincter function were included in this study. Laparoscopic low anterior resection was performed with a standard total mesorectal excision technique downward to the pelvic floor as low as possible. The bowel was resected proximal to the lesion with an endoscopic linear stapler. An anvil was inserted extracorporeally into the proximal colon via an extended working pore. The distal rectum coupled with the lesion was prolapsed and everted out of the anus. The neoplasm was resected with a sufficient margin above the dentate line under direct sight. A transrectal anastomosis without dog ears was performed intracorporeally to reconstitute the continuity of the bowel. Eleven cases, 6 male and 5 female patients, were included in this study. The mean operative time was 191 (129-292) minutes. The mean blood loss was 110 (30-300) mL. The median distal margin distance from the lower edge of the lesion to the dentate line was 1.5 (0.5-2.5) cm. All the resection margins were negative. Most patients experienced uneventful postoperative recoveries. No patient had anastomotic leak. Most patients had an acceptable stool frequency after loop ileostomy closure. Our preliminary data demonstrated the safety and feasibility of achieving a sound anastomosis without risking potential anastomotic leakage because of dog ear formation.

Endowrist versus wrist: a case-controlled study comparing robotic versus hand-assisted laparoscopic surgery for rectal cancer

BACKGROUND

Laparoscopic total mesorectal excision (TME) remains a technically challenging procedure. This study aims to compare the surgical outcomes of the robotic-assisted laparoscopic (RAL) versus hand-assisted laparoscopic (HAL) techniques in performing TME for patients with rectal cancers.

METHODS

A retrospective review of all patients who underwent RAL TME for rectal cancers was performed. These cases were matched for age, sex, and stage of malignancy with patients who underwent HAL TME. Data collected included age, sex, American Society of Anesthesiologists scores, comorbid conditions, types of surgical resections and operative times, perioperative complications, length of hospital stays, and histopathologic outcomes were analyzed.

RESULTS

From August 2008 to August 2011, 19 patients, with a median age of 62 (range, 47 to 92) years underwent RAL TME. Eight (42.1%) patients received neoadjuvant chemoradiotherapy. The median docking and operative times were 10 (range, 3 to 34) and 390 (range, 289 to 771) minutes, respectively. There was 1 (5.3%) conversion to open surgery. The grade of mesorectal excision was histopathologically reported as complete in all 19 cases. Positive circumferential margin was reported in 1 (5.3%) patient.Comparing the 2 groups, more patients in the RAL group received neoadjuvant chemoradiotherapy (8 vs. 3; P=0.048). The operative times were longer in the RAL group (390 vs. 225 min; P<0.001). A higher proportion of patients in the HAL group required conversion to open surgery (5 vs. 1; P=0.180) and developed perioperative morbidities (3 vs. 7; P=0.269). The median length of hospitalization was comparable between both groups (RAL: 7 vs. HAL: 6 d; P=0.476).The procedural cost was significantly higher in the RAL group (US$12,460 vs. US$8560; P<0.001), whereas the nonprocedural cost remained comparable between the 2 groups (RAL: US$4470 vs. HAL: US$4500; P=0.729).

CONCLUSIONS

RAL TME is associated with lower conversion and morbidity rates compared with HAL TME. The longer operating times and higher procedural costs are current limitations to its widespread adoption.

Selective approach for upper rectal cancer treatment: total mesorectal excision and preoperative chemoradiation are seldom necessary

BACKGROUND

The implementation of preoperative chemoradiation combined with total mesorectal excision has reduced local recurrence rates in rectal cancer. However, the use of both types of treatment in upper rectal cancer is controversial.

OBJECTIVE

The purpose of this work was to assess oncological results after radical resection of upper rectal cancers compared with sigmoid, middle, and lower rectal cancers and to determine risk factors for local recurrence in upper rectal cancer.

DESIGN

This was a retrospective analysis of prospectively collected data.

SETTINGS

This study was conducted in a tertiary care referral hospital in Valencia, Spain.

PATIENTS

Analysis included 1145 patients who underwent colorectal resection with primary curative intent for primary sigmoid (n = 450), rectosigmoid (n = 70), upper rectal (n = 178), middle rectal (n = 186), or lower rectal (n = 261) cancer.

MAIN OUTCOME MEASURES

Oncological results, including local recurrence, disease-free survival, and cancer-specific survival, were compared between the different tumor locations. Univariate and multivariate analyses were performed to identify risk factors for local recurrence in upper rectal cancer.

RESULTS

A total of 147 patients (82.6%) with upper rectal tumors underwent partial mesorectal excision, and only 10 patients (5.6%) of that group received preoperative chemoradiation. The 5-year actuarial local recurrence, disease-free survival, and cancer-specific survival rates for upper rectal tumors were 4.9%, 82.0%, and 91.6%. Local recurrence rates showed no differences when compared among all of the locations (p = 0.20), whereas disease-free survival and cancer-specific survival were shorter for lower rectal tumors (p = 0.006; p = 0.003). The only independent risk factor for local recurrence in upper rectal cancer was an involved circumferential resection margin at pathologic analysis (HR, 14.23 (95% CI, 2.75-73.71); p = 0.002).

LIMITATIONS

This was a single-institution, retrospective study.

CONCLUSIONS

Most upper rectal tumors can be treated with partial mesorectal excision without the systematic use of preoperative chemoradiation. Involvement of the mesorectal fascia was the only independent risk factor for local recurrence in these tumors.

Outcomes in 132 patients following laparoscopic total mesorectal excision (TME) for rectal cancer with greater than 5-year follow-up

INTRODUCTION

The role of laparoscopic TME for rectal cancer is still questioned as a safe and adequate cancer operation. Currently, multicenter randomized prospective trials are underway to evaluate this. We analyze our long-term results using laparoscopic TME in the treatment of rectal cancer to evaluate its oncologic outcomes.

METHODS

A prospective laparoscopic database was queried to identify all patients operated upon for rectal cancer from April 1997 to September 2007. In total, 151 patients were identified. Metastatic disease excluded 19 patients, leaving 132 patients to be analyzed for perioperative and 5-year oncologic outcomes. Procedures included LAR, n = 35; transanal abdominal transanal proctosigmoidectomy, n = 77; and APR, n = 20. All surgeries were TME or pTME.

RESULTS

Laparoscopic TME was performed on 89 men (67%), mean age 61 (22-85). Preoperative chemoradiation was administered in 119 (90.2 %) with median dose of 5500 cGy (3800-10,080). Mean EBL was 300 ml, and 4.5% were transfused. Seven patients (5.3%) underwent conversion, 5 to lap-assisted, with a 1.5% conversion rate to open. Pathologic stage of disease: complete response: 24%; I: 36%; II: 22%; III: 18%. There were no mortalities. Overall morbidity was 23.5%, with no anastomotic leaks and 5 (3.8%) delayed anastomotic stricture/fistula. There were no port site recurrences. Mean follow-up was 69.4 months (7.6-168.0). Overall LR was 5.3% (n = 7). There was only one isolated LR (0.8%). Mean time to local recurrence was 13.9 months. Metastatic rate was 18.2%. By stage, disease-specific survival was: CR 86.3%; I: 87.4%; II: 86.4%; III: 77.4%. Overall, 5-year survival was 84.8%.

CONCLUSION

The long-term data confirm that laparoscopic TME can be performed with lasting low local recurrence (5.3 %) and excellent 5-year survival (84.8%). This report's importance stems from it representing one of the largest experiences of rectal cancer treated by laparoscopic TME with greater than 5-year follow-up reported in the literature.

Colorectal surgery and its impact on male sexual function

The quality of functional outcome has become increasingly important in view of improvement in prognosis with colorectal cancer patients. Sexual dysfunction remains a common problem after colorectal cancer treatment, despite the good oncologic outcomes achieved by expert surgeons. Although radiotherapy and chemotherapy contribute, surgical nerve damage is the main cause of sexual dysfunction. The autonomic nerves are in close contact with the visceral pelvic fascia that surrounds the mesorectum. The concept of total mesorectal excision (TME) in rectal cancer treatment has led to a substantial improvement of autonomic nerve preservation. In addition, use of laparoscopy has allowed favorable results with regards to sexual function. The present paper describes the anatomy and pathophysiology of autonomic pelvic nerves, prevalence of sexual dysfunction, and the surgical technique of nerve preservation in order to maintain sexual function.

Single versus double stapling anastomotic technique in rectal cancer surgery

PURPOSE

The present study was designed to investigate whether there is a difference in the anastomotic leakage rate (AL) between the single stapling (CSA) and double stapling (DSA) anastomosis techniques.

METHODS

One hundred consecutive rectal cancer patients who underwent rectal resection with primary anastomosis were enrolled in this study.

RESULTS

The overall rate of clinical anastomotic leakage in both groups was 7 % (7/100); 6 % (3/50) in the CSA group and 8 % (4/50) in the DSA group. The anastomotic technique did not have any significant influence on the rate of AL. All AL were seen in low anastomoses (7 cm and below). The rate of AL in patients with a diverting stoma (13 %, 3/23) was not significantly different from that of the patients without (5.2 %, 4/77) (p = 0.195). The mean length of the operation was significantly shorter in the DSA group compared to the CSA group, at 127 and 141 min, respectively (p = 0.005). There were significantly higher rates of AL in patients receiving preoperative long course radiotherapy (15.4 %, 6/39) compared with those who did not receive radiotherapy (1.63 %, 1/61) (p = 0.014).

CONCLUSIONS

The CSA and DSA techniques are equally safe for the creation of a rectal anastomosis, without any significant difference in the AL rate. However, we recommend using the DSA technique because it has other definite advantages. In cases of neoadjuvant treatment and a low anastomosis, proximal diversion is recommended.

Efficacy of transanal drainage for anastomotic leakage after laparoscopic low anterior resection of the rectum

INTRODUCTION

Anastomotic leakage remains a devastating complication following low anterior resection of the rectum. Our aim was to retrospectively assess the efficacy of transanal drainage.

METHODS

Twenty-five patients with anastomotic leakage after laparoscopic low anterior resection (using the double-stapling technique) were reviewed. Transanal drainage was performed when an abscess was localized within the pelvic cavity, and any leakage was detected through radiological study and digital examination. In each patient, the fistula was dilated with a forefinger, and the abscess was drained into the rectum. A suction drain tube was indwelled transanally when the abscess cavity was large or unstable. Clinical outcomes of patients after transanal drainage were then analyzed.

RESULTS

Nine of the 25 patients required an emergency operation. The remaining 16 cases with localized disease were treated conservatively as an initial treatment. This included 12 patients treated by transanal drainage, 10 of whom were successfully cured. Two eventually required a defunctioning ileostomy because of fistula formation with other organs (treatment success rate: 83.3%). The median duration of drain placement, fasting and postoperative hospitalization were 10, 10 and 45 days, respectively.

CONCLUSIONS

Transanal drainage may be a viable option for the treatment of anastomotic leakage after low anterior resection of the rectum.

Short-term results of laparoscopic surgery after preoperative chemoradiation for clinically staged T3 and T4 rectal cancer

INTRODUCTION

The feasibility of laparoscopic surgery for clinically staged T3 and T4 rectal cancer has not been clearly defined specifically in cases following preoperative chemoradiation therapy (CRT). Our aim was to investigate the feasibility of laparoscopic surgery after preoperative CRT for clinically staged T3 and T4 rectal cancer.

METHODS

Between May 2003 and June 2009, 57 patients (T3: n = 50, T4: n = 7) who underwent preoperative CRT for rectal cancer were identified. Forty-three patients with laparoscopic surgery (Lap group) were compared with 14 patients who underwent open surgery (Open group). Perioperative data including postoperative morbidity were assessed between the two groups.

RESULTS

All patients underwent complete laparoscopic operations, and none was converted to laparotomy. Operating time was longer in the Open group (331 vs 375 min, P < 0.01). Blood loss was lower in the Lap group (160 vs 316 mL, P < 0.01). Lymph node harvest and morbidity rate were similar in both groups. The distal tumor margin was negative in all patients. No patients had perioperative mortality associated with surgery after CRT.

CONCLUSION

Laparoscopic surgery after preoperative CRT is a feasible and a safe option for T3 and T4 rectal cancer compared to conventional open surgery.

Sexual function, incontinence, and wellbeing in women after rectal cancer--a review of the evidence

INTRODUCTION

Colorectal cancer (CRC) is the second most common cancer. One-third of these cancers occur in the rectum. Treatment of rectal cancer involves surgery with/without radiotherapy and chemotherapy. Surgery is undertaken to prevent damage to the nerves controlling bladder, bowel, and sexual organs, whether this translates into preservation of urinary and fecal continence and sexual function and, ultimately, quality of life (QoL) is not known.

AIM

The aim of this review was to summarize the literature regarding the impact of treatment for rectal cancer on bladder and bowel continence, sexual function and QoL in women.

MAIN OUTCOME MEASURES

A comprehensive review of the current literature on sexual function, incontinence and wellbeing in women after treatment for rectal cancer highlighting prevalence rates, trial design, and patient population.

METHODS

We conducted a systematic search of the literature using A systematic search of the literature using Medline (Ovid, 1946-present) and PubMed (1966-2011) for English-language studies that included the following search terms: "colorectal cancer," or "rectal cancer," or "rectal neoplasm," and "sexual function," or "sexual dysfunction," or "wellbeing," or "QoL," or "urinary or fecal incontinence."

RESULTS

Although around 1/3 of women aged 50 to 70 years report lack of sexual desire, sexual function problems after treatment for rectal cancer are in the order of 60% among women. QoL improves with length of survival. Urinary and fecal incontinence are ongoing concerns for many women after treatment with rates up to 60%.

CONCLUSION

There is a gap in our knowledge of the effects of rectal cancer and its treatment on urinary and fecal continence, sexual function and QoL in women. There is a need for studies of sufficient size and duration to gain a better understanding of the disease and its management and the long-term effects on these parameters. This information is needed to develop preventative health care plans for women treated for rectal cancer that target those most at risk for these adverse outcomes.

Urinary and sexual dysfunction after rectal cancer treatment

In light of the improving prognosis for patients with rectal cancer, the quality of functional outcome has become increasingly important. Despite the good functional results achieved by expert surgeons, large multicenter studies show that urogenital dysfunction remains a common problem after rectal cancer treatment. More than half of patients experience a deterioration in sexual function, consisting of ejaculatory problems and impotence in men and vaginal dryness and dyspareunia in women. Urinary dysfunction occurs in one-third of patients treated for rectal cancer. Surgical nerve damage is the main cause of urinary dysfunction. Radiotherapy seems to have a role in the development of sexual dysfunction, without affecting urinary function. Pelvic autonomic nerves are especially at risk in cases of low rectal cancer and during abdominoperineal resection. Data concerning nerve damage during laparoscopic surgery for resection of rectal cancer are awaited. Structured education of surgeons with regard to pelvic neuroanatomy, and systematic registration of identified nerves, could well be the key to improving functional outcome for these patients. Meanwhile, patients should be informed of all associated risks before their operation, and their functional status should be evaluated before and after surgery.

Practicability of quality goals for the treatment of rectal cancer

PURPOSE

In 2007, the German Working Group "Workflow Rectal Cancer II" published 19 quality indicators with 36 quality goals for the treatment of rectal cancer. We investigate whether these parameters are practicable in a specialized coloproctologic unit.

PATIENTS AND METHODS

We included 578 consecutive patients with rectal cancer who were treated in our institution from January 2000 to December 2008. Patient data were collected in a prospective database. Follow-up was conducted in a colorectal tumor clinic. Data were analyzed for the defined reference groups, and the results were compared with the quality goals.

RESULTS

Median follow-up was 54.4 (range 1-116) months. We achieved 19 of the 36 defined quality goals. Among these were important parameters such as the rate of postoperative mortality (0.9%), the rate of intraoperative local tumor perforation (2.2% for anterior resection and 8.5% for abdominoperineal excision), the 5-year local recurrence rate (5.9% stages I-III), and the 5-year overall survival rates for stages yII and II (79.9%), and stages yIII and III (60.7%) for patients with microscopically negative resection margins.

CONCLUSION

Most of the defined quality goals can be achieved in a specialized coloproctologic unit. The debate on quality goals has the potential to enable further improvement in the care of rectal cancer patients.

Laparoscopic total mesorectal excision for rectal cancer: experience of a single center with a series of 174 patients

BACKGROUND

Laparoscopic total mesorectal excision for low rectal cancer is not considered a gold standard treatment due to the high conversion rate and the long operation time.

METHODS

A retrospective review examined a surgical series of 174 laparoscopic low rectal resections involving total mesorectal excision (1995-2006), with particular reference to technical points as well as surgical and oncologic outcomes. Miles operations and partial mesorectal excisions were excluded.

RESULTS

The cancer affected the low rectum in 110 cases and the medium rectum in 64 cases. A total of 68 patients were subjected to neoadjuvant radiochemotherapy. The anastomosis was mechanical for 83.3% of the cases and intersphinteric through the perineum for 16.6% of the cases. Protective ileostomy was performed in 112 cases. The conversion rate was 4.6%. The mesorectum remained intact in 91.6% of the cases and was partially interrupted in 15 of the cases. In no case was it totally discontinued. The postoperative morbidity rate was 16.7%, and the mortality rate was 0.57%. The incidence of anastomotic fistulas was 14.4%. The percentage was higher for males (18.6 vs 8.3%) and correlated with the low distance of the tumor from the anal verge (18.2 vs 7.8%) and the absence of a protection ileostomy (20.9 vs 10.7%). After an average follow-up period of 48.6 months (range, 24-149 months), six patients (3.44%) experienced a pelvic recurrence. The 5-year overall survival rate was 75.4%, and the disease-free survival rate was 61.9%.

CONCLUSION

Laparoscopic total mesorectal excision for low rectal cancer is safe and effective, allowing surgical and oncologic outcomes similar to those reported for open surgery.

Laparoscopic versus open techniques in rectal cancer surgery: a retrospective analysis of 121 sphincter-saving procedures in a single institution

BACKGROUND

There are few reports that show that laparoscopic rectal surgery for rectal cancer had similar oncological results based on short-term benefits. The purpose of this study was to analyze our institutional short- and long-term results in laparoscopic rectal surgery and to compare these results with that reported in the literature.

METHODS

The records of 121 patients who underwent sphincter-saving procedure for rectal cancer were reviewed. The variables analyzed included possible factors causing morbidity, anastomotic leak, and recurrence rate in the laparoscopic and open techniques. Multivariable analyses were used to determine relationship between variables. Survival curves were determined by using the Kaplan-Meier method.

RESULTS

Laparoscopic sphincter-saving total mesorectal excision or partial mesorectal excision was performed in 97 patients (group 1). Twenty-four patients had open procedure (group 2). The conversion rate from laparoscopic to open technique was 10.3% (n=10). The overall postoperative morbidity and anastomotic leak rates were 33.4% and 14.8%, respectively. There was no statistical difference in terms of postoperative morbidity (p=0.177) and anastomotic leak (p=0.216) between the two groups. Old age was an independent predictor for postoperative morbidity, and downstaging was an independent predictor for anastomotic leak with a sixfold increased risk. Complete downstaging to stage 0 showed a lower overall 5-year survival rate compared with non-downstaged stage I patients (79% vs. 100%). The overall local recurrence rate was 6%. There was one port site metastasis (0.8%). There were two (1.7%) postoperative deaths in group 1. The overall 5-year patient and disease-free survivals were 64% and 74%, respectively, and there was no difference between groups 1 and 2 (p=0.801).

CONCLUSIONS

Laparoscopic sphincter-saving rectal resection for rectal cancer shows good long-term results. However, it has no advantage in terms of short-term benefits compared with the open procedure. Further studies are needed to validate the effect of downstaging on anastomotic leaks.

Clinical and pathologic factors that predict lymph node yield from surgical specimens in colorectal cancer: a population-based study

BACKGROUND

The National Quality Forum endorses the recommendation of examining at least 12 lymph nodes (LNs) from colorectal cancer (CRC) specimens. However, heterogeneity in LN harvest exists. The objective of this study was to investigate the clinicopathologic factors that influence LN yield.

METHODS

The authors used the Surveillance, Epidemiology, and End Results database to identify patients who were diagnosed with stage I, II, and III CRC between 1994 and 2005. Poisson regression was used to model the number of LNs examined as a function of individual clinicopathologic factors, including age, sex, race, year of diagnosis, geographic region, anatomic site, preoperative radiation, tumor size, tumor classification, tumor differentiation, and LN positivity.

RESULTS

In total, 153,483 patients with CRC were identified. The mean number of LNs examined (+/- standard deviation) was 12 (+/-9.3). Separate multivariate analyses revealed that age, year of diagnosis, tumor size, and tumor classification were significant predictors of LN yield for colon and extraperitoneal rectal cancers (P < .01 for all covariates). Tumor location and radiotherapy were significant predictors of LN yield in patients with colon cancer and rectal cancer, respectively. Overall LN yields increased between 2% and 3% annually.

CONCLUSIONS

Despite the increasing yields observed over time, patients with rectal cancer and older patients who had distally located, early colon cancer were less likely to meet the benchmark yield of 12 LNs. Further investigation into how LN yield is influenced by alterable factors, such as the extent of mesenteric resection and the pathologic technique, as well as nonalterable factors, such as patient age and tumor location, may reveal innovative ways to improve current staging methods.

Is laparoscopic colorectal cancer surgery equal to open surgery? An evidence based perspective

Laparoscopic colorectal surgery (LCS) is an evolving subject. Recent studies show that LCS can not only offer safe surgery but evidence is growing that this new technique can be superior to classical open procedures. Fewer perioperative complications and faster postoperative recovery are regularly mentioned when studies of LCS are presented. Even though the learning curve of LCS is frequently debated when limitations of laparoscopic surgeries are reviewed, studies show that in experienced hands LCS can be a safe procedure for colorectal cancer treatment. The learning curve however, is associated with high conversion rates and economical aspects such as higher costs and prolonged hospital stay. Nevertheless, laparoscopic colorectal cancer surgery (LCCR) offers several advantages such as less co-morbidity and less postoperative pain in comparison with open procedures. Furthermore, the good exposure of the pelvic cavity by laparoscopy and the magnification of anatomical structures seem to facilitate pelvic dissection laparoscopically. Moreover, recent studies describe no difference in safety and oncological radicalness in LCCR compared to the open total mesorectal excision (TME). The oncological adequacy of LCCR still remains unproven today, because long-term results do not yet exist. To date, only a few studies have described the results of laparoscopic TME combined with preoperative adjuvant treatment for colorectal cancer. The aim of this review is to examine the various areas of development and

controversy of LCCR in comparison to the conventional open approach.

Distribution of lymph nodes in the mesorectum: how deep is TME necessary?

BACKGROUND

Standardization of total mesorectal excision (TME) had a great impact on decreasing local recurrence rates for the treatment of rectal cancer. However, exact numbers and distribution of lymph nodes (LN) along the mesorectum remains controversial with some studies suggesting that few LNs are present in the distal third of the mesorectum.

METHODS

Eighteen fresh cadavers without a history of rectal cancer were studied. The rectum was removed by TME and then was divided into right lateral, posterior and left lateral sides, which were further subdivided into 3 levels (upper, middle and lower). A pathologist determined the number and sizes of the LNs in each of the nine areas, b linded to their anatomical origin.

RESULTS

Overall, the mesorectum had a mean of 5.7 LNs (SD=3.7) and on average each LN had a maximum diameter of 3.0 mm (SD=2.7). There was no association between the mean number or size of LNs with gender, BMI, or age. There was a significantly higher prevalence of LNs in the posterior location (2.8 per mesorectum) than in the two lateral locations (0.8 and 1.2 per mesorectum; p=0.02). The distribution of LNs in the three levels of the rectum was not significant.

CONCLUSIONS

The distribution of LNs reinforces the fact that TME should always include the distal third of the mesorectum. Care must be taken to not violate the posterior aspect of the mesorectum.

Laparoscopic anterior resection and total mesorectal excision for rectal cancer: a prospective nonrandomized study

BACKGROUND

The purpose of this study was to present our experience of laparoscopic total mesorectal resection, including ultralow resection and coloanal anastomosis.

MATERIALS AND METHODS

Between 1993 and 2005, patients fit for general anesthesia, with resectable cancers, and with lower edge of tumor beyond 5 cm of the anal verge were subjected to laparoscopic anterior resection with sphincter preservation. Double stapling technique is used to establish bowel continuity.

RESULTS

A total of 170 patients, 88 males and 82 females, were subjected to successful laparoscopic anterior resection, which included high anterior resection (n=90), low anterior resection (n=52), ultralow anterior resection (n=20), and coloanal anastomosis (n=8). The average age of patients was 58.4 years (12-90 years). Mean operating time was 130 min and mean hospital stay was 7 days. The morbidity was 13.5% with nil mortality. With an average follow-up of 49 months (range 9 years to 3 months), 9 patients developed local recurrence and 45 patients developed distant metastasis.

CONCLUSION

In selected cases, laparoscopic anterior resection is possible for all levels of rectal tumors, allowing sphincter preservation and maintaining oncological safety.

Perioperative prophylaxis with granulocyte colony-stimulating factor (G-CSF) in high-risk colorectal cancer patients for an improved recovery: A randomized, controlled trial

BACKGROUND

We aimed to improve the postoperative outcome of high-risk patients (American Society of Anesthesiologists class 3 and 4) recovering from colorectal cancer surgery by using recombinant human G-CSF (filgrastim) as perioperative prophylaxis.

METHODS

In a double-blinded, placebo-controlled trial, 80 patients undergoing left-sided colorectal resection were randomized to filgrastim or placebo. Filgrastim (5 mug/kg) or placebo was administered in the afternoon on day -1, 0, and +1 relative to the operation. Primary endpoints were in a hierarchic order: quality of life (QoL) over time (determined at discharge, 2 and 6 months after operation with the European Organization for Research and Treatment of Cancer questionnaire) and the McPeek recovery score, which measures death and duration of stays in the intensive care unit and hospital. Predefined secondary endpoints were global QoL, subdomains of QoL, postoperative recovery, duration of stay, 6-month overall survival, complication rates, and cellular and immunologic parameters.

RESULTS

There were no significant differences in both primary endpoints between the treatment groups. A significant improvement (P < .05) was obtained by filgrastim prophylaxis in the QoL subdomain family life /- social functioning,; thus, more patients recovered to their preoperative state (14 vs 4 with placebo) as determined by structured interviews. Duration of hospital stay (14 vs 12 days) and noninfectious complications were decreased from 8% to 3%.

CONCLUSIONS

High-risk patients undergoing major operation for colorectal cancer profited from filgrastim prophylaxis with regard to duration of hospital stay, noninfectious complications, social QoL, and subjective recovery from operation. These endpoints, however, were secondary, and the primary endpoints (overall QoL and the McPeek index) did not show comparable benefits. A new confirmatory trial with the successful endpoints of this trial, as well as a cost analysis, will be needed to confirm the results before a general recommendation for the prophylactic use of G-CSF in high-risk cancer patients can be given.

Quality of life after total mesorectal excision for rectal cancer

BACKGROUND

After total mesorectal excision for rectal cancer, many surgeons try to avoid an abdominoperineal resection (APR) by performing a transanally double stapled low colo-rectal anastomosis (LRA), frequently without a pouch. This policy is mainly based on the assumption that the quality of life after such LRA is higher than after APR. It has been suggested that a better functional outcome and therefore a higher quality of life might be achieved by a colo-anal J-pouch anastomosis (CPA). The aim of this study was to assess quality of life among disease-free survivors after APR, LRA and CPA.

METHODS

The charts of 301 consecutive patients who had undergone surgery for cancer in the middle or lower third of the rectum were analysed. Two hundred four patients were eligible for inclusion. The quality of life among these patients was assessed using one generic (EQ-5D) and two disease-specific questionnaires (EORTC QLQ-C30 and EORTC QLQ-CR38).

RESULTS

The response rate was 82%. The median follow-up was 31 months. Overall, quality of life was good but CPA patients had better quality of life scores than APR and LRA patients. This difference was not only due to the better functional outcome but also to the lower incidence of disturbed micturition and sexual problems in the CPA group.

CONCLUSION

The quality of life after colo-anal J-pouch anastomosis is better than after abdominoperineal resection (APR) and low colo-rectal anastomosis (LRA). The quality of life after APR is similar to that after LRA.

Long-term outcomes of laparoscopic surgery for colorectal cancer

Multiple reports have outlined the potential benefits of the laparoscopic approach to colon surgery. Recently, randomized control trials have demonstrated the safety of applying these techniques to colorectal cancer. This study examined the long-term follow-up assessment of patients after laparoscopic colorectal cancer resections and compared them with a large prospective database of open resections. A total of 231 resections were performed for adenocarcinoma of the colon or rectum between 1992 and 2004. Of these 231 resections, 93 were rectal (40.3%) and 138 were colonic (59.7%). A total of 8 (3.2%) of the resections were performed as emergencies, and 27 (11.7%) were converted to open surgery. The mean follow-up period was 35.84 months (range, 0-132 months). The disease recurred in 51 of the patients (22.1%) before death, involving 14 (6.1%) local and 37 (16%) distant recurrences. Only two patients had wound recurrences (0.8%), and both patients had widespread peritoneal recurrence at the time of diagnosis. The overall survival rate was 65.3% at 60 months and 60.3% at 120 months. The disease-free survival rate was 58% at 60 months and 56% at 120 months. Laparoscopic techniques can be applied to a wide range of colorectal malignancies without sacrificing oncologic results during a long-term follow-up period.

Neoadjuvant chemoradiation increases the risk of pelvic sepsis after radical excision of rectal cancer

PURPOSE

This study was designed to examine the effect of neoadjuvant chemoradiation on pelvic sepsis after mesorectal excision for rectal cancer.

METHODS

A retrospective chart review was conducted for all patients who underwent curative mesorectal excision for rectal cancer during an eight-year period. Demographic, preoperative, perioperative data were collected. Pelvic sepsis was defined as clinical or radiographically demonstrable leak or a pelvic abscess. Neoadjuvant chemoradiation included 5,040 Gy in conjunction with three cycles of 5-fluorouracil-based chemotherapy, followed by a one-month waiting period.

RESULTS

From January 1994 to December 2002, 246 patients (151 males; mean age 68 (range, 36-97) years) underwent curative resection for rectal cancer. Procedures included 186 anterior resections, 52 abdominoperineal resections, and 8 Hartmann's. Of 60 patients (24.4 percent) who had neoadjuvant chemoradiation, 9 (15 percent) developed pelvic sepsis (3 leaks, 6 abscesses) compared with 9 of 186 (4.8 percent) after primary surgery (6 leaks, 3 abscesses; P < 0.01). Ninety-three patients had an anastomosis <or=6 cm from the anal verge. Of these, 9 patients (9.7 percent) developed pelvic sepsis (5 leaks, 4 abscesses): 5 of 28 (17.9 percent) after neoadjuvant chemoradiation vs. 4 of 65 (6.2 percent) after primary surgery (P = 0.22). Only 6 of 93 patients (6.5 percent) with an anastomosis >or=7 cm developed pelvic sepsis (5 leaks and 1 abscess), of whom 1 had preoperative radiation. Pelvic abscess developed in 3 of 24 patients after neoadjuvant chemotherapy and abdominoperineal resection. After primary abdominoperineal resection, none of the remaining 28 patients developed pelvic sepsis. A multivariable logistic regression model was constructed to determine predictors of sepsis. Neoadjuvant chemotherapy was the only variable that was predictive (odds ratio, 3.4; 95 percent confidence interval, 1.3-9).

CONCLUSIONS

The addition of neoadjuvant chemoradiation to mesorectal excision significantly increased the rate of pelvic sepsis. This was particularly true for anastomoses in the lower third of the rectum. Fecal diversion should be considered in these patients.

Feasibility of autonomic nerve-preserving surgery for advanced rectal cancer based on analysis of micrometastases

Background

Autonomic nerve preservation has been advocated as a means of preserving urinary and sexual function after surgery for rectal cancer, but may compromise tumour clearance. The aim of this study was to determine the incidence of micrometastasis in the connective tissues surrounding the pelvic plexus.

Methods

The study included 20 consecutive patients who underwent rectal surgery with bilateral lymph node dissection for advanced cancer. A total of 78 connective tissues medial and lateral to the pelvic plexus and 387 lymph nodes were sampled during surgery. All connective tissue samples and 260 lymph nodes were examined for micrometastases by reverse transcriptase–polymerase chain reaction (RT–PCR) after operation. All patients were followed prospectively for a median of 36·0 months.

Results

Of 245 histologically negative lymph nodes, 38 (15·5 per cent) were shown by RT–PCR to harbour micrometastases. However, micrometastases to tissues surrounding the pelvic plexus were detected in only two (3 per cent) of 78 tissues, that is in two of 20 patients. Clinical follow-up showed that the two patients had a poor prognosis owing to distant metastases.

Conclusion

Autonomic nerve-preserving surgery may be feasible for advanced rectal cancer, but study of more patients positive for micrometastases is required.

Rectal cancer: a compartmental disease. the mesorectum and mesorectal lymph nodes

Even though the technique of total mesorectal excision has been widely used, there have been few detailed descriptions of the distribution of lymph nodes within the rectal mesentery. We describe the results of our anatomic study of lymph node size and distribution within the mesorectum and pelvic side-wall tissue using a fat-clearing solvent in seven male cadavers, and we used a similar technique to examine the mesorectum in a patient who underwent total mesorectal excision after preoperative chemoradiation for a uT3 rectal cancer. In both the cadavers and our patient, the majority of lymph nodes were located within the posterior upper two-thirds of the mesorectum. Few lymph nodes were located in the distal mesorectum or anteriorly. In the cadavers, the majority of lymph nodes were less than 3 mm in diameter. In the patient who had received preoperative chemoradiation, routine tissue processing yielded only four lymph nodes, whereas processing in fat-clearing solvent yielded 25 additional nodes. The majority of these nodes, in contrast to those observed in cadavers, were less than 1 mm in diameter. The majority of mesorectal lymph nodes were located within the upper two-thirds of the posterior mesorectum. Complete removal of nodes in this area may, in part, explain the superior results of total mesorectal excision with respect to local recurrence.

Laparoscopic total mesorectal excision (TME) for rectal cancer surgery: long-term outcomes

BACKGROUND

Total mesorectal excision (TME) offers the lowest reported rates of local recurrence and the best survival results in patients with rectal cancer. However, the laparoscopic approach to resection for colorectal cancer remains controversial due to fears that oncologic principles will be compromised. We assessed the feasibility, safety and long-term outcome of laparoscopic rectal cancer resections following the principles of TME. The aim of this study was to evaluate the perioperative outcome and long-term results of laparoscopic TME.

METHODS

We reviewed the prospective database of 102 consecutive unselected patients undergoing laparoscopic TME for rectal cancer between November 1991 and December 2000. Follow-up was done through office charts or direct patient contact. Recurrence and survival curves were generated by the Kaplan-Meier method.

RESULTS

Laparoscopic TME was completed successfully in 99 patients, whereas conversion to an open approach was required in three cases (3%). The overall morbidity and mortality rates were 27% and 2%, respectively, with an overall anastomotic leak rate of 17%. Of the 102 patients, four were excluded from the oncologic evaluation because final pathology was not confirmatory (two had anal canal squamous cell carcinoma and two had villous adenoma with dysplasia). In 90 of the 98 remaining patients (91.8%), the resection was considered curative. The remainder had a palliative resection due to synchronous metastatic disease or locally advanced disease. Mean follow-up was 36 months (range, 6-96). There were no trocar site recurrences. The local recurrence rate was 6%, and the cancer-specific survival of all curatively resected patients was 75% at 5 years. The overall survival rate of all curatively resected patients was 65% at 5 years; mean survival time was 6.23 years (95% confidence interval [CI], 5.39-7.07).

CONCLUSION

Laparoscopic TME is feasible and safe. The laparoscopic approach to the surgical treatment of operable rectal cancer does not seem to entail any oncologic disadvantages.

Training and quality assurance for rectal cancer: 20 years of data is enough

Rectal cancer is a common disease with a high rate of mortality. During the past 20 years, substantial improvements have been made in the surgical, pathological, radiological, and oncological approaches used to treat this disease, but there is good evidence for continuing suboptimum performances among the teams that treat patients with colorectal cancers. Studies involving more than 4000 patients show that large reductions in local recurrences and a 20% increase in survival can be achieved with high-quality surgical and pathological training in total mesorectal excision. New developments in radiology and oncology may further increase this benefit.

Pathologic prognostic factors in the recurrence of rectal cancer

For rectal cancer, local recurrence following surgical treatment is a grave complication that occurs in as many as 25% of cases. Pathological examination of the surgical resection specimen plays a primary role in assessing both the surgery- and tumor-related factors that contribute to the risk of recurrence. Among the tumor-related factors, stage has long been considered the single most accurate indicator of survival. However, recent evidence strongly suggests that the most powerful predictor of both local recurrence and overall outcome in the absence of distant metastatic disease is the macroscopic quality of the mesorectum in the resection specimen and the proximity of the tumor to the circumferential (radial) resection margin. Additional pathologic features have been shown to have stage-independent prognostic significance in colorectal cancer and may help to further define risk of adverse outcome. Such features include: tumor grade; histologic type; extent of extramural penetration by tumor; neural, venous, and/or lymphatic invasion; tumor border configuration; tumor budding; and host lymphoid response. The predictive value of tumor-specific molecular features is currently under investigation and may help to further improve prognostication and refine individual patient management in rectal cancer.

Strategies in the management of mid and distal rectal cancer with total mesorectal excision

In the last two decades, dramatic improvement in outcome has been made in the management of rectal cancer. This has been brought about mainly by advancements in surgical technique for radical resection. With the recognition of the importance of the circumferential margin and presence of spread in the lymphovascular tissues in the mesorectum, total mesorectal excision is now commonly recognized as the optimal surgical technique for cancer of the mid and distal rectum. Not only have local control and disease-specific survival improved with the practice of total mesorectal excision, but various bodily functions have also been preserved following surgery for rectal cancer. New issues have arisen with the practice of total mesorectal excision and the strategies for management of rectal cancer require re-evaluation. In this article, the rationale and the outcomes of total mesorectal excision are reviewed. Issues such as the high anastomotic leakage rate following sphincter-preserving surgery, the poor results of abdominoperineal resection, the role of adjuvant therapy and bowel function disturbances will be addressed. Lastly, the status of the laparoscopic approach to rectal cancer with the principle of total mesorectal excision are discussed.