Emergency subtotal/total colectomy in the management of obstructed left colon carcinoma

Colonic stenting in acute malignant large bowel obstruction: audit of efficacy and safety in a Singapore tertiary referral centre

Introduction

Acute malignant large bowel obstruction (MBO) occurs in 8%-15% of colorectal cancer patients. Self-expandable metal stents (SEMS) have progressed from a palliative modality to use as bridge to surgery (BTS). We aimed to assess the safety and efficacy of SEMS for MBO in our institution.

Methods

The data of patients undergoing SEMS insertion for MBO were reviewed. Technical success was defined as successful SEMS deployment across tumour without complications. Clinical success was defined as colonic decompression without requiring further surgical intervention. Rates of complications, median time to surgery, types of surgery and rates of recurrence were studied.

Results

Seventy-nine patients underwent emergent SEMS placement from September 2013 to February 2020. Their mean age was 68.8 ± 13.8 years and 43 (54%) patients were male. Mean tumour length was 4.2 cm ± 2.2 cm; 89.9% of malignant strictures were located distal to the splenic flexure. Technical and clinical success was 94.9% and 98.7%, respectively. Perforation occurred in 5.1% of patients, with none having stent migration or bleeding. Fifty (63.3%) patients underwent SEMS insertion as BTS. Median time to surgery was 20 (range 6-57) days. Most (82%) patients underwent minimally invasive surgery. Primary anastomosis rate was 98%. Thirty-nine patients had follow-up beyond 1-year posttreatment (median 34 months). Local recurrence and distant metastasis were observed in 4 (10.3%) and 5 (12.8%) patients, respectively.

Conclusion

Insertion of SEMS for acute MBO has high success rates and a good safety profile. Most patients in this audit underwent minimally invasive surgery and primary anastomosis after successful BTS.

Risk factors for anastomotic leakage and postoperative outcomes after total and subtotal colectomy: A nationwide retrospective cohort study (RIALTCOT Study Collaborative Group)

Aim

Anastomotic leakage (AL) following ileorectal (IRA) or ileosigmoid (ISA) anastomosis is associated with a high morbidity. The identification of potential risk factors for AL could change operative planning and reduce further complications. This study assesses the rate, potential risk factors and management of AL after total colectomy (TC) and subtotal colectomy (STC).

Methods

A nationwide, multicentre, retrospective cohort study involved 26 Spanish referral centres. It included TC and STC with IRA or ISA patients between January 2013 and December 2020. Clinical data, primary surgery and complications were collected. Univariate and multivariate analysis to identify risk factors for AL were performed. Management of Grade B–C AL and permanent stoma rate was assessed according to revisional surgeries.

Results

The study included 1074 patients, 433 ISA group (40.3%) and 641 IRA group (59.7%). The overall incidence of AL was 14.3% with no differences between IRA and ISA (14.2% and 14.5% respectively), P = 0.871. Male sex, ASA score and lower total preoperative proteins were identified as independent risk factors for global and Grade B–C AL. Diverting ileostomy did not protect against AL (P = 0.084). Clavien–Dindo ≥IIIA complication was found in 251 patients (23.3%). Stoma reversal was not possible in 85 patients (8.1%), being more frequent after anastomosis excision and terminal ileostomy in AL Grade C.

Conclusion

Total colectomy and STC with IRA or ISA are high‐risk procedures with an increased AL rate. Male sex, ASA score and lower preoperative protein level were associated with global AL and AL Grade B and C. A lower permanent stoma rate could be obtained when diverting ileostomy is performed in revision surgery.

Self-expandable metallic stents as a bridge to surgery in obstructive right- and left-sided colorectal cancer: a multicenter cohort study

The insertion of a self-expandable metal stent (SEMS) has been proposed as an alternative to emergent surgery (ES) for obstructive colorectal cancer (CRC). We aimed to evaluate the perioperative and oncologic outcomes of SEMS as a bridge to surgery in obstructive CRC, as compared with ES. We retrospectively reviewed the medical records of patients who underwent curative resection of obstructive CRC at four Hallym University-affiliated hospitals between January 2010 and December 2019. All patients were analyzed overall colon, then according to the side of obstruction (overall, right or left). Of 167 patients, 52 patients underwent ES and 115 underwent SEMS insertion and surgery (SEMS group). The postoperative hospital stay and time to soft diet were shorter in the SEMS group than in the ES group for overall and both sided cancer. The SEMS group had lower rates of stoma formation and severe complications for overall and for left-sided cancer. The 5-year overall survival (P = 0.682) and disease-free survival (P = 0.233) rates were similar in both groups. SEMS insertion as a bridge to surgery was associated with faster recovery, a lower rate of stoma formation with similar oncologic outcomes to those of ES.

Short-term and long-term outcomes of subtotal/total colectomy in the management of obstructive left colon cancer

Purpose

Surgical management of obstructive left colon cancer (OLCC) is still a matter of debate. The classic Hartmann procedure (HP) has a disadvantage that requires a second major operation. Subtotal colectomy/total abdominal colectomy (STC/TC) with ileo-sigmoid or ileo-rectal anastomosis is proposed as an alternative procedure to avoid stoma and anastomotic leakage. However, doubts about morbidity and functional outcome and lack of long-term outcomes have made surgeons hesitate to perform this procedure. Therefore, this trial was designed to provide data for morbidity, functional outcomes, and long-term outcomes of STC/TC.

Methods

This study retrospectively analyzed consecutive cases of OLCC that were treated by STC/TC between January 2000 and November 2020 at a single tertiary referral center. Perioperative outcomes and long-term outcomes of STC/TC were analyzed.

Results

Twenty-five descending colon cancer (45.5%) and 30 sigmoid colon cancer cases (54.5%) were enrolled in this study. Postoperative complications occurred in 12 patients. The majority complication was postoperative ileus (10 of 12). Anastomotic leakage and perioperative mortality were not observed. At 6 to 12 weeks after the surgery, the median frequency of defecation was twice per day (interquartile range, 1-3 times per day). Eight patients (14.5%) required medication during this period, but only 3 of 8 patients required medication after 1 year. The 3-year disease-free survival was 72.7% and 3-year overall survival was 86.7%.

Conclusion

The risk of anastomotic leakage is low after STC/TC. Functional and long-term outcomes are also acceptable. Therefore, STC/TC for OLCC is a safe, 1-stage procedure that does not require diverting stoma.

Risk Factors for Anastomotic Leakage Following Total or Subtotal Colectomy

Introduction A higher rate of anastomotic leakage (AL) is reported after ileosigmoid anastomosis (ISA) or ileorectal anastomosis (IRA) in total or subtotal colectomy (TSC) compared with colonic or colorectal anastomosis. The main aim of the present study was to assess potential risk factors for AL after ISA or IRA and to investigate determinants of morbidity.

Methods We identified 180 consecutive patients in a prospective referral, single center database, in which 83 of the patients underwent TSC with ISA or IRA. Data regarding the clinical characteristics, surgical treatment, and outcome were assessed to determine their association with the cumulative incidence of AL and surgical morbidity.

Results Ileosigmoid anastomosis was performed in 51 of the patients (61.5%) and IRA in 32 patients (38.6%). The cumulative incidence of AL was 15.6% (13 of 83 patients). A higher AL rate was found in patients under 50 years-old (p = 0.038), in the elective-laparoscopic approach subgroup (p = 0.049), and patients in the inflammatory bowel disease (IBD) subgroup (p = 0.009). Furthermore, 14 patients (16.9%) had morbidity classified as Clavien-Dindo ≥ IIIA.

Discussion A relatively high incidence of AL after TSC was observed in a relatively safe surgical procedure. Our findings suggest that the risk of AL may be higher in IBD patients. According to our results, identifying risk factors prior to surgery may improve short-term outcomes.

Emergency surgery for obstructive splenic flexure colon cancer: results of a multicentric study of the French Surgical Association (AFC)

Management of malignant left-sided colonic obstruction remains challenging and requires a stoma in 40-65% of patients. In those with obstructive splenic flexure colon cancer (OSFCC), a debate still exists regarding the most appropriate surgery. The aim of this muticenter study was to report and compare the different surgical procedures in OSFCC patients with a special focus on operative and histological characteristics and survival outcomes including 12-month stoma-free survival. Between 2000 and 2015, 2325 patients were treated for obstructive colon cancer in centers members of the French National Surgical Association (AFC). Among them, 198 underwent surgery for OSFCC and were retrospectively analyzed. Patients with OSFCC and proximal colonic ischemia or perforation were excluded. Four procedures were performed: decompressing stoma (DS, 39%), splenic flexure colectomy (SFC, 39%), subtotal colectomy (STC, 17%,) and left hemicolectomy (LHC, 5%). All patients treated with LHC underwent a Hartmann's procedure. There was no significant difference between groups for postoperative mortality and morbidity. Hospital stay was significantly longer after DS. The length of the specimen, longitudinal resection margins and number of harvested lymph nodes were significantly higher in the STC group. There was no difference for overall and disease-free survival. Stoma-free survival was significantly lower after LHC (62%) in comparison with the other groups (p < 0.0001). At the end of follow-up, 50% of patients who underwent LHC had a permanent stoma. In OSFCC patients without proximal colonic ischemia or peritonitis, LHC should no longer be recommended due to a high risk of permanent stoma.

Malignant Large Bowel Obstruction

Large bowel obstruction is a serious and potentially life-threatening surgical emergency which is associated with high morbidity and mortality rate. The most common etiology is colorectal cancer which accounts for over 60% of all large bowel obstructions. Proper assessment, thoughtful decision-making and prompt treatment is necessary to decrease the high morbidity and mortality which is associated with this entity. Knowledge of the key elements regarding the presentation of a patient with a large bowel obstruction will help the surgeon in formulating an appropriate treatment plan for the patient. Comprehensive knowledge and understanding of the various treatment options available is necessary when caring for these patients. This chapter will review the presentation of patients with malignant large bowel obstruction, discuss the various diagnostic modalities available, as well as discuss treatment options and the various clinical scenarios in which they are most appropriately utilized.

Colon sparing resection versus extended colectomy for left-sided obstructing colon cancer with caecal ischaemia or perforation: a nationwide study from the French Surgical Association

AIM

It is not known whether patients with obstructive left colon cancer (OLCC) with caecal ischaemia or diastatic perforation (defined as a blowout of the caecal wall related to colonic overdistension) should undergo a (sub)total colectomy (STC) or an ileo-caecal resection with double-barrelled ileo-colostomy. We aimed to compare the results of these two strategies.

METHOD

From 2000 to 2015, 1220 patients with OLCC underwent surgery by clinicians who were members of the French Surgical Association. Of these cases, 201 (16%) were found to have caecal ischaemia or diastatic perforation intra-operatively: 174 patients (87%) underwent a STC (extended colectomy group) and 27 (13%) an ileo-caecal resection with double-end stoma (colon-sparing group). Outcomes were compared retrospectively.

RESULTS

In the extended colectomy group, 95 patients (55%) had primary anastomosis and 79 (45%) had a STC with an end ileostomy. In the colon-sparing group, 10 patients (37%) had simultaneous resection of their primary tumour with segmental colectomy and an anastomosis which was protected by a double-barrelled ileo-colostomy. The demographic data for the two groups were comparable. Median operative time was longer in the STC group (P = 0.0044). There was a decrease in postoperative mortality (7% vs 12%, P = 0.75) and overall morbidity (56% vs 67%, P = 0.37) including surgical (30% vs 40%, P = 0.29) and severe complications (17% vs 27%, P = 0.29) in the colon-sparing group, although these differences did not reach statistical significance. Cumulative morbidity included all surgical stages and the rate of permanent stoma was 66% and 37%, respectively, with no significant difference between the two groups. Overall survival and disease-free survival were similar between the two groups.

CONCLUSION

The colon-sparing strategy may represent a valid and safe alternative to STC in OLCC patients with caecal ischaemia or diastatic perforation.

Stenting versus surgery in obstructed malignant colorectal cancer-a review of short and long-term results

Obstructed colorectal cancers (CRCs) continue to be challenging to manage. Apart from surgical resection, the use of self-expanding metallic stents (SEMS) has become increasingly popular. SEMS could potentially allow for the conversion of an emergency operation into a semi-elective procedure, allow for the optimization of the patient's physiology, avoid the requirement for a stoma, as well as allow for a minimally-invasive approach to be adopted. This review article therefore highlights the evidence available in the literature pertaining to the use of SEMS in obstructed CRCs.

Preoperative CT Colonography in Partially Obstructed Colon Cancer, and its Benefit in Surgical Management

Background and aims

Stenotic colorectal carcinoma impending obstruction (SCRCIO) is a frequently encountered situation complicating 10% to 19% of colorectal cancers. This group of patients cannot undergo complete colonoscopic assessment. The aim of this study is to examine the accuracy of computed tomographic colonography (CTC) as preoperative assessment of the colon of patients with SCRCIO and to measure the effect on the surgical decision.

Materials and methods

This was a prospective study, from September 2009 through December 2012, on a cohort of symptomatic adult patients with SCRCIO. Patients underwent CTC evaluation after failed conventional colonoscopy (CC), followed by a follow-up endoscopic examination 3–6 months after surgical treatment.

Results

Twenty-nine patients with an average age of 55 were included in this study; the majority of stenotic masses were located in the sigmoid colon. Preoperative CTC matched the colonoscopy location of the stenotic masses (17 patients). CTC sensitivity per stenotic lesion detection was 100% and 92.5% for the location. Sensitivity was 100% for synchronous lesions, and CTC changed surgical plan in 17% of the patients.

Conclusion

CTC presented high sensitivity, specificity and accuracy for the identification of colonic lesions of any size. Preoperative CTC may possibly become the diagnostic procedure of choice for SCRCIO patients. It enables surgeons to evaluate the entire colon, minimizing the possibility of surgical re-intervention if there is a finding of synchronous neoplastic lesions at postoperative follow-up endoscopy.

Retroperitoneal Cecal Perforation Resulting from Obstructive Ascending Colon Adenocarcinoma

Most colorectal cancer patients in the early stages of the disease do not display any alarming symptoms. A total percentage of 9-27% of colorectal cancer patients present with acute abdomen, bowel obstruction, perforation, or bleeding. Perforation as the first presentation of the disease is seen in no more than 2.6-10% of patients. Intestinal perforation may be found on either the site of the tumor or on a more proximal site, caused by distention of the bowel due to peripheral obstruction. This is a case of a 75-year-old female patient who presents in the emergency department with retroperitoneal cecal perforation due to an obstructing tumor of the ascending colon. She underwent an emergency right hemicolectomy and washout of the retroperitoneal space. The cecum is not an unusual site of distention and subsequent perforation in the case of colonic obstruction, especially in the presence of a competent ileocecal valve. While the mechanism of diastatic cecal perforation is well described, it is the first time in the literature that this does not occur on the anterior surface of the organ. In our case, cecal perforation presents as a retroperitoneal abscess without peritoneal spillage. Nonetheless, it still carries a grim prognosis and urgent surgical intervention is needed.

Laparoscopic Approach to Large Bowel Neoplastic Obstruction After Self-Expandable-Metal-Stent (SEMS) Placement

Endoscopic self-expandable metal stent (SEMS) placement as a bridge to surgery in large bowel neoplastic obstruction is an alternative to emergency surgery for the obstructive colorectal neoplasms. This study aims to analyze postoperative and long-term outcomes in a series of patients who underwent laparoscopic colorectal resection after SEMS placement. The analysis, after the stratification based on the time elapsed between the onset of the occlusive symptoms and the SEMS positioning, revealed an interesting result, with lower mortality for patients who underwent the procedure within 24 hours of hospitalization (P=0.0159). This trend may indicate the need to reduce the endoscopic time schedules as much as possible, even if an emergency procedure is needed. The laparoscopic approach, after stent placement as bridge therapy, can be a safe alternative to emergency surgery, if the procedure is precociously applied.

Endoscopic stenting in colorectal cancer

Acute malignant large bowel obstruction presents as one of the few emergencies of colorectal cancer (CRC). Management of this condition can either be by (I) upfront surgery or (II) the use of self-expanding metallic stent (SEMS) as a bridge to elective surgery. For patients with metastasis, the use of SEMS is reported to enable earlier commencement of chemotherapy. Although the use of SEMS in patients with acute malignant large bowel obstruction looks promising, it is plagued by its own set of complications and divided opinion over its long-term outcomes. Conflicting data are present, and definitive indication requires further evaluation and debate. This article will describe the typical presentation of patients with acute malignant large bowel obstruction. An introduction to the SEMS insertion procedural steps will be undertaken. Following which the article aims to review the safety profile of SEMS and the short- and long-term outcomes of SEMS in both the curative and palliative setting.

Better recurrence-free survival after stent bridge to surgery compared to emergency surgery for obstructive left-sided colonic cancer in patients with stage III status of the American Joint Committee on Cancer (AJCC): a bicentric retrospective study

PURPOSE

Stenting as a bridge to surgery (SBTS) can transform an emergency surgery (ES) into an elective surgery in patients with symptomatic left-sided malignant colonic obstruction. Concerns have been raised regarding short-term morbidity and long-term oncologic outcomes, with contrasting results reported in the literature. Our main aim is to evaluate not only long-term oncologic outcomes but also short-term postoperative outcomes of stented patients who underwent elective surgery compared to those who had ES.

METHODS

From January 2006 to May 2012, we retrospectively identified patients with confirmed left-sided colorectal cancer obstruction. This was done in two centers of reference of colorectal diseases in southern Spain with patients who were treated with curative intent either with ES or SBTS. The short- and long-term results were compared between both groups.

RESULTS

There were 71 patients in the stenting group and 66 in the emergency surgery group, with similar demographic data. Initial stoma creation rates were lower in the SBTS group (16.9% vs. 54.5%, p < 0.005) and the primary anastomosis rate was higher in the same group (83.1% vs. 45.5%, p < 0.005). Five-year recurrence-free survival (RFS) rates were comparable between groups (75.3 vs. 59.8%, p = 0.220), but RFS rates at 5 years for AJCC pathologic stage III were higher in the stenting group (69.7% vs 30%, p = 0.004). Both groups were comparable regarding overall and cancer-specific survival outcomes.

CONCLUSIONS

The use of SBTS reduces ostomy rates in patients with obstructive colon malignancies. Long-term survival results are similar. Patients in the SBTS group with stage III AJCC status showed a higher 5-year recurrence-free survival rate than those in the ES group.

2017 WSES guidelines on colon and rectal cancer emergencies: obstruction and perforation

ᅟ

Obstruction and perforation due to colorectal cancer represent challenging matters in terms of diagnosis, life-saving strategies, obstruction resolution and oncologic challenge. The aims of the current paper are to update the previous WSES guidelines for the management of large bowel perforation and obstructive left colon carcinoma (OLCC) and to develop new guidelines on obstructive right colon carcinoma (ORCC).

METHODS

The literature was extensively queried for focused publication until December 2017. Precise analysis and grading of the literature has been performed by a working group formed by a pool of experts: the statements and literature review were presented, discussed and voted at the Consensus Conference of the 4th Congress of the World Society of Emergency Surgery (WSES) held in Campinas in May 2017.

RESULTS

CT scan is the best imaging technique to evaluate large bowel obstruction and perforation. For OLCC, self-expandable metallic stent (SEMS), when available, offers interesting advantages as compared to emergency surgery; however, the positioning of SEMS for surgically treatable causes carries some long-term oncologic disadvantages, which are still under analysis. In the context of emergency surgery, resection and primary anastomosis (RPA) is preferable to Hartmann's procedure, whenever the characteristics of the patient and the surgeon are permissive. Right-sided loop colostomy is preferable in rectal cancer, when preoperative therapies are predicted.With regards to the treatment of ORCC, right colectomy represents the procedure of choice; alternatives, such as internal bypass and loop ileostomy, are of limited value.Clinical scenarios in the case of perforation might be dramatic, especially in case of free faecal peritonitis. The importance of an appropriate balance between life-saving surgical procedures and respect of oncologic caveats must be stressed. In selected cases, a damage control approach may be required.Medical treatments including appropriate fluid resuscitation, early antibiotic treatment and management of co-existing medical conditions according to international guidelines must be delivered to all patients at presentation.

CONCLUSIONS

The current guidelines offer an extensive overview of available evidence and a qualitative consensus regarding management of large bowel obstruction and perforation due to colorectal cancer.

Using a Video-Laparoscope for Intraoperative Colonoscopy: An Experimental Study on Intraluminal Temperature Values and Tissue Damage

Laparoscopy systems possess remarkable heat production. Video-laparoscopy was used for colonoscopy intraoperatively in rabbits. Rod lens type laparoscopes 5 and 10 mm in diameter connected with 175 and 300-W xenon light sources were used in combination. Physiological parameters including blood pressure, pulse, oxygen saturations, and luminal temperatures were investigated during 20 minutes of colonoscopy. Thermal damage scores were obtained by histopathologic analysis of the intestinal wall. The changes were categorized as physiological and structural. Damage scores were not different when 175-W light source was used with 5- and 10-mm laparoscopes. Intraluminal heat values most increased with 300 W plus 10-mm laparoscope and caused significant increase in damage scores. Structural damage indicating tissue necrosis was not observed with any of the combination in all groups. Video-laparoscopy systems did not cause significant tissue damage when used at low and moderate levels of xenon light source in the rabbit bowel intraoperatively.

Self-expanding metallic stent as a bridge to surgery in the treatment of left colon cancer obstruction: Cost-benefit analysis and oncologic results

INTRODUCTION

The use of a self-expanding metallic stent as a bridge to surgery in acute malignant left colonic obstruction has been suggested as an alternative treatment to emergency surgery. The aim of the present study was to compare the morbi-mortality, cost-benefit and long-term oncological outcomes of both therapeutic options.

METHODS

This is a prospective, comparative, controlled, non-randomized study (2005-2010) performed in a specialized unit. The study included 82 patients with left colon cancer obstruction treated by stent as a bridge to surgery (n=27) or emergency surgery (n=55) operated with local curative intention. The main outcome measures (postoperative morbi-mortaliy, cost-benefit, stoma rate and long-term oncological outcomes) were compared based on an "intention-to-treat" analysis.

RESULTS

There were no significant statistical differences between the two groups in terms of preoperative data and tumor characteristics. The technically successful stenting rate was 88.9% (11.1% perforation during stent placement) and clinical success was 81.4%. No difference was observed in postoperative morbi-mortality rates. The primary anastomosis rate was higher in the bridge to surgery group compared to the emergency surgery group (77.8% vs. 56.4%; P=.05). The mean costs in the emergency surgery group resulted to be €1,391.9 more expensive per patient than in the bridge to surgery group. There was no significant statistical difference in oncological long-term outcomes.

CONCLUSIONS

The use of self-expanding metalllic stents as a bridge to surgery is a safe option in the urgent treatment of obstructive left colon cancer, with similar short and long-term results compared to direct surgery, inferior mean costs and a higher rate of primary anastomosis.

Ostomy in Nontraumatic Conditions: Our Experience and Review of the Literature

A number of nontraumatic acute abdomen can result in peritonitis leading to sepsis. In emergent conditions, various procedures like segmentary colectomy and/or subtotal colectomy with anastomosis, Hartmann's procedure, transverse colectomy, and/or expandable metallic stent (SEMS) placement can be performed, considering the status of the patient and the facilitaties of the institution. In our study, we examined the cases diagnosed as acute abdomen without the history of trauma, which had lead to a procedure requiring colostomy. We retrospectively analysed 105 cases of nontraumatic acute abdomen, resulted in a procedure requiring colostomy. American Society of Anesthesiologists (ASA) scoring and Mannheim Peritonitis Index (MPI) were used in the evaluation of the risk of mortality and morbidity. There were colonic perforations of rectosigmoid tumor in 66 cases (62.8 %), sigmoid volvulus in 10 cases (9.5 %), colonic anastomotic leakage in 9 cases (8.5 %), intestinal adhesions in 8 cases (7.6 %), mesenteric ischemia in 5 cases (4.7 %), gynecological diseases in 3 cases (2.85 %), strangulated hernias in 3 (2.85 %), and Ogilvie syndrome in 1 case (0.95 %). Rate of morbidity was found to be 25.7 %, while mortality occurred in 2.8 % of the cases. Cases with mortality and morbidity had ASA scores above two and MPI scores above 23. Anastomotic leakage was the only reason of mortality. In nontraumatic occasions, the management and prognosis of cases with peritonitis, general status of the patients play major roles. The prognosis rates of morbidity and mortality can be highly predicted when ASA and MPI scores are evaluated together.

Obstructive Left Colon Cancer Should Be Managed by Using a Subtotal Colectomy Instead of Colonic Stenting

PURPOSE

This study compared a subtotal colectomy to self-expandable metallic stent (SEMS) insertion as a bridge to surgery for patients with left colon-cancer obstruction.

METHODS

Ninety-four consecutive patients with left colon-cancer obstruction underwent an emergency subtotal colectomy or elective SEMS insertion between January 2007 and August 2014. Using prospectively collected data, we performed a retrospective comparative analysis on an intention-to-treat basis.

RESULTS

A subtotal colectomy and SEMS insertion were attempted in 24 and 70 patients, respectively. SEMS insertion technically failed in 5 patients (7.1%). The mean age and rate of obstruction in the descending colon were higher in the subtotal colectomy group than the SEMS group. Sex, underlying disease, American Society of Anesthesiologists physical status, and pathological stage showed no statistical difference. Laparoscopic surgery was performed more frequently in patients in the SEMS group (62 of 70, 88.6%) than in patients in the subtotal colectomy group (4 of 24, 16.7%). The overall rate of postoperative morbidity was higher in the SEMS group. No Clavien-Dindo grade III or IV complications occurred in the subtotal colectomy group, but 2 patients (2.9%) died from septic complications in the SEMS group. One patient (4.2%) in the subtotal colectomy group had synchronous cancer. The total hospital stay was shorter in the subtotal colectomy group. The median number of bowel movements in the subtotal colectomy group was twice per day at postoperative 3-6 months.

CONCLUSION

A subtotal colectomy for patients with obstructive left-colon cancer is a clinically and oncologically safer, 1-stage, surgical strategy compared to SEMS insertion as a bridge to surgery.

How to decide on stent insertion or surgery in colorectal obstruction?

Colorectal cancer is one of the most common cancers in western society and malignant obstruction of the colon accounts for 8%-29% of all large bowel obstructions. Conventional treatment of these patients with malignant obstruction requiring urgent surgery is associated with a greater physiological insult on already nutritionally replete patients. Of late the utility of colonic stents has offered an option in the management of these patients in both the palliative and bridge to surgery setting. This has been the subject of many reviews which highlight its efficacy, particulary in reducing ostomy rates, allowing quicker return to oral diet, minimising extended post-operative recovery as well as some quality of life benefits. The uncertainity in managing patients with malignant colonic obstructions has lead to a more cautious use of stenting technology as community equipoise exists. Decision making analysis has demonstrated that surgeons' favored the use of stents in the palliative setting preferentially when compared to the curative setting where surgery was preferred. We aim to review the literature regarding the use of stent or surgery in colorectal obstruction, and then provide a discourse with regards to the approach in synthesising the data and applying it when deciding the appropriate application of stent or surgery in colorectal obstruction.

Preoperative evaluation of colorectal cancer using CT colonography, MRI, and PET/CT

Imaging studies are a major component in the evaluation of patients for the screening, staging and surveillance of colorectal cancer. This review presents commonly encountered findings in the diagnosis and staging of patients with colorectal cancer using computed tomography (CT) colonography, magnetic resonance imaging (MRI), and positron emission tomography (PET)/CT colonography. CT colonography provides important information for the preoperative assessment of T staging. Wall deformities are associated with muscular or subserosal invasion. Lymph node metastases from colorectal cancer often present with calcifications. CT is superior to detect calcified metastases. Three-dimensional CT to image the vascular anatomy facilitates laparoscopic surgery. T staging of rectal cancer by MRI is an established modality because MRI can diagnose rectal wall laminar structure. N staging in patients with colorectal cancer is still challenging using any imaging modality. MRI is more accurate than CT for the evaluation of liver metastases. PET/CT colonography is valuable in the evaluation of extra-colonic and hepatic disease. PET/CT colonography is useful for obstructing colorectal cancers that cannot be traversed colonoscopically. PET/CT colonography is able to localize synchronous colon cancers proximal to the obstruction precisely. However, there is no definite evidence to support the routine clinical use of PET/CT colonography.

Caecal pneumatosis is not an absolute contraindication for endoluminal stenting in patients with acute malignant large bowel obstruction

BACKGROUND

The computed tomographic (CT) finding of caecal pneumatosis in patients with malignant large bowel obstruction has been associated with ischaemia and impending perforation. Emergency surgery is then usually performed without consideration of endoluminal stenting. The aim of our study was to correlate caecal viability to the CT finding of caecal pneumatosis in patients with acute malignant large bowel obstruction.

METHODS

A retrospective review of the CT scans of all patients presenting with acute malignant large bowel obstruction was performed. Patients with CT evidence of caecal pneumatosis were identified and this was correlated with intraoperative and histopathological findings.

RESULTS

There were 10 patients who had caecal pneumatosis on their CT scans between 2007 and 2010. Five underwent immediate surgery while the other five had emergency endoluminal stenting performed. One failed the stenting procedure and proceeded to emergency surgery. The other four were stented successfully and underwent interval surgery in an elective setting. In the six patients who underwent emergency surgery, four were found to have a viable caecum intra-operatively and underwent a segmental resection. The remaining two had an ischaemic caecum--one had curvilinear pneumatosis and the other had a predominantly bubbly pattern of pneumatosis on their CT scans.

CONCLUSION

Caecal pneumatosis alone is not a reliable predictor of caecal viability in patients with acute malignant large bowel obstruction. Such a finding on CT scan should be correlated clinically before excluding the role of endoluminal stenting.

Outcome of emergency one-stage resection and anastomosis procedure for patients with obstructed colorectal cancer

PURPOSES

The purpose of this study was to verify the outcome of the emergency one stage resection and anastomosis procedure for patients with obstructed colorectal cancer.

METHODS

An emergency one stage resection and anastomosis procedure was performed for 40 patients with obstructive colorectal cancer. The outcome was verified and compared dividing into two groups. 17 patients under the age of 70 in (Group A), 23 patients 70 years and over in (Group B).

RESULTS

The operative mortality rate in both groups was 0%. As a result, postoperative complications were not significantly different between the two groups. The overall survival rate after a 5-year period in both groups was 41.8%, regarding all patients and the survival curves for the two groups, was not significantly different. The 5 year survival rate in stage II or III showed no differences between the two groups.

CONCLUSION

The one-stage resection and anastomosis of the large bowel could be applied safely to emergency patients, which in turn allows for excellent short-term operative results in both groups mentioned. This particular procedure should be positively enforced, even in elderly patients in their 70's.

Management of malignant left colonic obstruction: is an initial temporary colostomy followed by surgical resection a better option?

AIM

The surgical management of obstructed left colorectal cancer (OLCC) is still a matter of debate, and current guidelines recommend Hartmann's procedure (HP). The study evaluated the results of the surgical management with a focus on a strategy of initial colostomy (IC) followed by elective resection.

METHOD

All patients operated on for OLCC were reviewed. Clinical, surgical, histological, morbidity and long-term results were noted.

RESULTS

From 2000-11, 83 patients (48 men) with a mean age of 70.3 ± 15.1 years underwent surgery for OLCC. Eleven (13.3%) had a subtotal colectomy owing to a laceration of the caecal wall. Eleven had a HP for tumour perforation (n = 6) or as palliation in a severely ill patient (n = 5). The remaining 61 (73.5%) patients had an IC, with the intention of performing an elective resection shortly after recovery. Postoperative complications occurred in six (9.8%) and there were two (3.3%) deaths. Fifty-nine operation survivors had a colonoscopy shortly afterwards which showed a synchronous cancer in two (3.4%). Twelve of the 59 patients had synchronous metastases. The subsequent elective resection including the colostomy site could be performed in 45 (74%) patients during the same admission at a median interval of 11 (7-17) days. The overall median length of hospital stay was 20 days and the 30-day mortality was 3/61 (5%).

CONCLUSION

IC followed by surgical resection is a technically simple strategy, allowing initial abdominal exploration with a short period of having a colostomy, and permitting elective surgery with a low morbidity and full oncological lymphadenectomy.

Current management of acute malignant large bowel obstruction: a systematic review

BACKGROUND

The management of colonic obstruction has changed in recent years. In distal obstruction, optimal treatment remains controversial, particularly after the appearance and use of colonic endoluminal stents. The purpose of this study was to review the current treatment of acute malignant large bowel obstruction according to the level of evidence of the available literature.

METHODS

A systematic search was conducted in PubMed, MEDLINE, Embase, and Google Scholar for articles published through January 2013 to identify studies of large bowel obstruction and colorectal cancer. Included studies were randomized and nonrandomized controlled trials, reviews, systematic reviews, and meta-analysis.

RESULTS

After a literature search of 1,768 titles and abstracts, 218 were selected for full-text assessment; 59 studies were ultimately included. Twenty-five studies of the diagnosis and treatment of obstruction and 34 studies of the use of stents were assessed.

CONCLUSIONS

In view of the various alternatives and the lack of high-grade evidence, the treatment of distal colonic obstruction should be individually tailored to each patient.

Impact of contrast-enhanced computed tomography colonography on laparoscopic surgical planning of colorectal cancer

AIM

To evaluate the impact of contrast-enhanced computed tomography colonography (CE-CTC) on laparoscopic surgery planning in patient with stenosing colorectal cancer.

MATERIALS AND METHODS

Sixty-nine patients with endoscopically proven colorectal cancer underwent CE-CTC, after incomplete conventional colonoscopy. Two experienced radiologists evaluated site, length, and TNM staging of colorectal cancers on three-dimensional double contrast enema-like views, 2D axial and multiplanar reconstructions. All the patients underwent colorectal resection and surgery bulletin, pathology of surgical specimens, and radiological follow-up at about 8 months were used as reference standard.

RESULTS

The detection rate of colorectal cancer was 100 % (75/75); CE-CTC allowed for a diagnosis of a synchronous colorectal cancer in five patients (7 %). CE-CTC correctly judged the site of the lesions in all the cases; clinically significant localization errors at conventional colonoscopy were noted in 3 out of 69 patients (4 %). Additional colonic polyps greater than 6 mm in diameter were found in 21 out of 69 patients (30 %); in two patients (3 %) the surgeon performed an enlarged colectomy to include synchronous polyps proximal to colorectal cancer. Sensitivity, specificity, PPV, NPV, and accuracy were for T1-T2 vs. T3-T4: 96 %, 71 %, 92 %, 87 %, and 91 %, respectively; for N: 94 %, 42 %, 64 %, 86 %, and 70 %; for M: 100 %, 100 %, 83 %, 100 %, and 97 %. There were no complications associated with CE-CTC.

CONCLUSION

Information given by CE-CTC concerning colorectal cancer location and synchronous colonic cancers and polyps changed the laparoscopic surgical strategy in almost 14 % of patients.

Colonic endolumenal stenting devices and elective surgery versus emergency subtotal/total colectomy in the management of malignant obstructed left colon carcinoma

BACKGROUND

Traditionally, left-sided acute bowel obstruction is treated by a staged procedure because immediate resection and anastomosis in a massive distended and unprepared colon carries a high complication rate. Total abdominal colectomy is a one-stage procedure that will remove synchronous proximal neoplasms, reduce the risk of subsequent metachronous tumor, and avoid stoma. Colorectal stents are being used for palliation and as a bridge to surgery in obstructing colorectal carcinoma, making elective surgery straightforward, enabling easily mobilization and resection of the colon with a possible trend toward reduction in postoperative complication rates compared to emergency surgery. The purpose of this work was to compare the procedures of endoscopic stenting followed by elective colectomy versus total abdominal colectomy and ileorectal anastomosis in the management of acute obstructed carcinoma of the left colon as regards feasibility, safety, and clinical outcomes

METHODS

From January 2009 through May 2012, 60 patients were randomized to either emergency stenting followed by elective resection (ESER group) or total abdominal colectomy and ileorectal anastomosis (TACIR group).

RESULTS

Twenty nine patients (96.7 %) had successful stenting and underwent elective surgery 7-10 days later (ESER group). Postoperative complications were encountered in four patients in the ESER group compared to 15 patients in the TACIR group (p = 0.012). Anastomotic leakage was encountered in one patient (3.3 %) in the TACIR group. There were no operative mortalities in the present study. Within the first three postoperative months, the TACIR group patients had significantly more frequent bowel motions per day compared to the ESER group patients although (p = 0.013). In both study groups, the follow-up duration ranged from 6 to 40 months with a median of 18 months. Recurrent disease was encountered in five patients (17.2 %) in the ESER group compared to four patients (13.3 %) in the TACIR group (p = 0.228).

CONCLUSION

Both techniques are feasible, safe, and produce comparable oncological outcomes. However, endoscopic stenting followed by elective resection was associated with significantly less postoperative complications and bowel motions per day.

Comparison of short-term outcomes after elective surgery following endoscopic stent insertion and emergency surgery for obstructive colorectal cancer

PURPOSE

The aim of this study was to compare short-term morbidities and mortalities of elective surgery after stent insertion and emergency surgery in obstructive colorectal cancer.

METHODS

We retrospectively reviewed 77 patients with obstructive colorectal cancer that underwent elective surgery after stenting (stent group: SG, n = 49) or emergent surgery (emergency group: EG, n = 28) from January 2000 to July 2010.

RESULTS

The American Society of Anesthesiologists (ASA) score of SG was lower than that of EG (p = 0.015). The percentages of open and laparoscopic surgery in SG were 73.5% (36/49) and 26.5% (13/49), respectively, whereas surgery in EG was performed using an open technique (p = 0.003). The rate of primary anastomosis, without constructing a stoma, was 87.8% in SG and 42.9% in EG (p < 0.001). There was no difference in a postoperative complication. Anastomotic leakage according to time between stent placement and surgery in SG were 3 cases for 1-9 days and 0 for more than 10 days (p = 0.037). Three-year overall survival rates were 68.8% and 51.3% (p = 0.430), respectively.

CONCLUSION

Preoperative stent insertion in obstructive colorectal cancer seems to be safe and feasible, and may decrease second stage procedure. Waiting 10 days after stent placement may be a more optimal time for surgical intervention. Further prospective randomized studies are needed to determine the proper time bridge to surgery following stent insertion in obstructive colorectal cancer.

Endoscopic stenting and elective surgery versus emergency surgery for left-sided malignant colonic obstruction: a prospective randomized trial

PURPOSE

This study aims to evaluate the role of colonic stenting as a bridge to surgery in acutely obstructed left-sided colon cancer.

METHODS

Patients with acute left-sided malignant colonic obstruction with no evidence of peritonitis were recruited. After informed consent, patients were randomized to colonic stenting followed by elective surgery or immediate emergency surgery. Patients who had successful colonic stenting underwent elective surgery 1 to 2 weeks later, while the other group had emergency surgery. Patients in whom stenting was unsuccessful also underwent emergency surgery.

RESULTS

Twenty patients were randomized to stenting and 19 to emergency surgery. Fourteen patients (70%) had successful stenting and underwent elective surgery at a median of 10 days later; the rest underwent emergency surgery. Technical stent failure occurred in five patients (25%). One patient failed to decompress after successful stent deployment. All patients underwent definitive colonic resection with primary anastomosis. Two of 20 patients in the stenting group required defunctioning stomas compared to 6 of 19 in emergency surgery group, p = 0.127. Overall complication rate was 35% versus 58% (p = 0.152) and mortality was 0% versus 16% (p = 0.106) in the stenting group and emergency surgery group, respectively. Postoperatively, the stenting group was discharged from hospital earlier (median of 6 versus 8 days, p = 0.028) than the emergency surgery group.

CONCLUSION

Colonic stenting followed by interval elective surgery may be safer, with a trend towards lower morbidity and mortality when compared with the current practice of emergency surgery for left-sided malignant colonic obstruction.

Prospective, controlled, randomized study of intraoperative colonic lavage versus stent placement in obstructive left-sided colonic cancer

BACKGROUND

The main aim of this study was to compare short-term results and long-term outcomes of patients who underwent intraoperative colonic lavage (IOCL) with primary anastomosis with those who had stent placement prior to scheduled surgery for obstructive left-sided colonic cancer (OLCC).

METHODS

We conducted a prospective, controlled, randomized study of patients diagnosed with OLCC. Patients were divided into two groups: stent and deferred surgery (group 1) and emergency IOCL (group 2). Demographic variables, risk prediction models, postoperative morbidity and mortality, staging, complications due to stent placement, surgical time, clinical follow-up, health costs, and follow-up of survival were recorded.

RESULTS

Twenty-eight patients (15 group 1 and 13 group 1) were enrolled. The study was suspended upon detecting excess morbidity in group 2. The two groups were homogeneous in clinical and demographic terms. Overall morbidity in group 1 was 2/15 (13.3%) compared with 7/13 (53.8%) in group 2 (p = 0.042). None of the 15 patients in group 1 presented anastomotic dehiscence compared with 4/13 (30.7%) in group 2 (p = 0.035). Surgical site infection was detected in 2 (13.3%) patients in group 1 and in 6 (46.1%) in group 2 (p = 0.096). Postoperative stay was 8 days (IQR 3, group 1) and 10 days (IQR 10, group 2) (p = 0.05). The mean follow-up period was 37.6 months (SD = 16.08) with no differences in survival between the groups.

CONCLUSION

In our setting, the use of a stent and scheduled surgery is safer than IOCL and is associated with lower morbidity, shorter hospital stay, and equally good long-term survival.

Guidelenines in the management of obstructing cancer of the left colon: consensus conference of the world society of emergency surgery (WSES) and peritoneum and surgery (PnS) society

BACKGROUND

Obstructive left colon carcinoma (OLCC) is a challenging matter in terms of obstruction release as well of oncological issues. Several options are available and no guidelines are established. The paper aims to generate evidenced based recommendations on management of OLCC.

METHODS

The PubMed and Cochrane Library databases were queried for publications focusing on OLCC published prior to April 2010. A extensive retrieval, analyses, and grading of the literature was undertaken. The findings of the research were presented and largely discussed among panellist and audience at the Consensus Conference of the World Society of Emergency Surgery (WSES) and Peritoneum and Surgery (PnS) Society held in Bologna July 2010. Comparisons of techniques are presented and final committee recommendation are enounced.

RESULTS

Hartmann's procedure should be preferred to loop colostomy (Grade 2B). Hartmann's procedure offers no survival benefit compared to segmental colonic resection with primary anastomosis (Grade 2C+); Hartmann's procedure should be considered in patients with high surgical risk (Grade 2C). Total colectomy and segmental colectomy with intraoperative colonic irrigation are associated with same mortality/morbidity, however total colectomy is associated with higher rates impaired bowel function (Grade 1A). Segmental resection and primary anastomosis either with manual decompression or intraoperative colonic irrigation are associated with same mortality/morbidity rate (Grade 1A). In palliation stent placement is associated with similar mortality/morbidity rates and shorter hospital stay (Grade 2B). Stents as a bridge to surgery seems associated with lower mortality rate, shorter hospital stay, and a lower colostomy formation rate (Grade 1B).

CONCLUSIONS

Loop colostomy and staged procedure should be adopted in case of dramatic scenario, when neoadjuvant therapy could be expected. Hartmann's procedure should be performed in case of high risk of anastomotic dehiscence. Subtotal and total colectomy should be attempted when cecal perforation or in case of synchronous colonic neoplasm. Primary resection and anastomosis with manual decompression seems the procedure of choice. Colonic stents represent the best option when skills are available. The literature power is relatively poor and the existing RCT are often not sufficiently robust in design thus, among 6 possible treatment modalities, only 2 reached the Grade A.

Guidelenines in the management of obstructing cancer of the left colon: consensus conference of the world society of emergency surgery (WSES) and peritoneum and surgery (PnS) society

BACKGROUND

Obstructive left colon carcinoma (OLCC) is a challenging matter in terms of obstruction release as well of oncological issues. Several options are available and no guidelines are established. The paper aims to generate evidenced based recommendations on management of OLCC.

METHODS

The PubMed and Cochrane Library databases were queried for publications focusing on OLCC published prior to April 2010. A extensive retrieval, analyses, and grading of the literature was undertaken. The findings of the research were presented and largely discussed among panellist and audience at the Consensus Conference of the World Society of Emergency Surgery (WSES) and Peritoneum and Surgery (PnS) Society held in Bologna July 2010. Comparisons of techniques are presented and final committee recommendation are enounced.

RESULTS

Hartmann's procedure should be preferred to loop colostomy (Grade 2B). Hartmann's procedure offers no survival benefit compared to segmental colonic resection with primary anastomosis (Grade 2C+); Hartmann's procedure should be considered in patients with high surgical risk (Grade 2C). Total colectomy and segmental colectomy with intraoperative colonic irrigation are associated with same mortality/morbidity, however total colectomy is associated with higher rates impaired bowel function (Grade 1A). Segmental resection and primary anastomosis either with manual decompression or intraoperative colonic irrigation are associated with same mortality/morbidity rate (Grade 1A). In palliation stent placement is associated with similar mortality/morbidity rates and shorter hospital stay (Grade 2B). Stents as a bridge to surgery seems associated with lower mortality rate, shorter hospital stay, and a lower colostomy formation rate (Grade 1B).

CONCLUSIONS

Loop colostomy and staged procedure should be adopted in case of dramatic scenario, when neoadjuvant therapy could be expected. Hartmann's procedure should be performed in case of high risk of anastomotic dehiscence. Subtotal and total colectomy should be attempted when cecal perforation or in case of synchronous colonic neoplasm. Primary resection and anastomosis with manual decompression seems the procedure of choice. Colonic stents represent the best option when skills are available. The literature power is relatively poor and the existing RCT are often not sufficiently robust in design thus, among 6 possible treatment modalities, only 2 reached the Grade A.

Management of acute malignant large-bowel obstruction with self-expanding metal stent

PURPOSE

Colorectal stents are being used for palliation and as a "bridge to surgery" in obstructing colorectal carcinoma. The purpose of this study was to review our experience with self-expanding metal stents (SEMS) as the initial interventional approach in the management of acute malignant large-bowel obstruction.

METHODS

Between February 2002 and August 2009, 93 patients underwent the insertion of a SEMS for an obstructing malignant lesion of the left-sided colon or rectum.

RESULTS

In 66 patients, the stents were placed for palliation; whereas, in 27 patients they were placed as a bridge to surgery. Stent placement was technically successful in 92.5% (n = 86) of the patients, with a clinical success rate of 86% (n = 80). Three perforations occurred during stent placement, two were treated by an emergency Hartmann operation, and one by a colostomy. In the intention to treat by stent, the peri-interventional mortality was 6.5% (6/93). Stent migration was reported in three cases (3%), and stent obstruction occurred in 11 cases (12%). Of the 24 patients with stents successfully placed as a bridge to surgery, 22 underwent elective single-stage operations with no death or anastomotic complication.

CONCLUSION

Stent insertion provided an effective outcome in patients with malignant colonic obstruction as a palliative and preoperative therapy.

A comparison of palliative stenting or emergent surgery for obstructing incurable colon cancer

BACKGROUND

Acute colonic obstruction because of advanced colonic malignancy is a surgical emergency. Our aim was to review our experience with self-expanding metal stents (SEMS) compared to emergent surgery as the initial therapy for the management of patients with incurable obstructing colon cancer.

METHODS

A retrospective review of patients with obstructing colon cancer who underwent insertion of a SEMS (n = 53) or surgery (n = 70) from 2002 to 2008 was performed. The primary endpoint was relief of obstruction. Secondary endpoints include technical success of the procedure, duration of hospital stay, early and long-term complications, and overall survival.

RESULTS

Both groups were similar in age, sex, and tumor distribution. Placement of SEMS was successful in 50/53 (94%) patients. Surgery was effective in relieving obstruction in 70/70 (100%) patients. Patients in the SEMS group have a significantly shorter median hospital stay (2 days) as compared to the surgery group (8 days) (P < 0.001). Patients with SEMS also had significantly less acute complications compared to the surgery group (8 vs. 30%, P = 0.03). The hospital mortality for the SEMS group was 0% compared to 8.5% in patients that underwent surgical decompression (P = 0.04). There was no difference in survival between the two groups (P = 0.76).

CONCLUSIONS

In patients with colorectal cancer and obstructive symptoms, SEMS provide a highly effective and safe therapy when compared to surgery. In most patients with metastatic colorectal cancer and obstruction, SEMS provide a minimally invasive alternative to surgical intervention.

Surgery for obstructed colorectal malignancy in an Asian population: predictors of morbidity and comparison between left- and right-sided cancers

INTRODUCTION

Surgical treatment of obstructed colorectal cancers has been associated with significant perioperative morbidity and mortality. This study was performed to review the spectrum of surgery and early outcome of patients with acutely obstructed colorectal cancers. The secondary aims were to compare right- and left-sided obstruction and to identify factors predicting morbidity and mortality in these patients.

METHODS

A retrospective review of all patients who underwent operative intervention for acute obstruction from colorectal malignancy from February 2003 to April 2008 was performed. Patients were identified from the hospital's operating records based on postoperative diagnosis codes of colorectal malignancy. The diagnosis of acute obstruction was confirmed through clinical assessment, radiological investigations, and surgical findings. All the complications were graded according to the classification proposed by Clavien and group.

RESULTS

Out of a total of 1,268 patients who underwent surgery for colorectal malignancy, 134 (10.6%) patients with a median age of 71 years (range, 34-97 years) were operated for acute obstruction. Left-sided malignancy accounted for 79.9% of the obstruction, with sigmoid colon being the most common site in 54 (40.3%) patients. A significant proportion (77.6%) of our patients had associated perioperative morbidity, and the mortality rate was 11.9%. Worse complications (grades of complications III to V) were more frequent in patients who had a higher American Society of Anesthesiologists score (3-4), are > or = 60 years old, and had preoperative renal impairment. Stoma was created more frequently in left-sided pathology.

CONCLUSION

In an Asian population, surgery in patients with acute colorectal malignant obstruction is associated with significant morbidity and mortality rates. Though left-sided malignant obstruction occurs more frequently and is associated with a higher incidence of stoma creation, primary resection and anastomosis is a safe option in selected patients.

Comparison of one-stage managements of obstructing left-sided colon and rectal cancer: stent-laparoscopic approach vs. intraoperative colonic lavage

PURPOSE

We evaluated the operative outcomes of laparoscopic surgery following self-expandable metallic stent compared to one-stage emergency surgical treatment.

METHODS

From April 1996 to October 2007, 95 consecutive patients with left-sided malignant colorectal obstruction were enrolled. Twenty-five patients were assigned to the preoperative stenting and elective laparoscopic surgical treatment group (SLAP) and 70 to the emergency open surgery with intraoperative colon lavage group (OLAV).

RESULTS

Among the 25 patients in the SLAP group, a primary anastomosis was possible in all patients and a diverting stoma was needed in one patient. The operative time was shorter in the SLAP group (198.53 vs. 262.17 min, P = 0.002). Tumor size, number of retrieved lymph nodes, and pathological stage were similar in both groups. The rate of anastomotic failure was similar and postoperative complications occurred less in the SLAP group (5.9% vs. 31.4%, P = 0.034). The passage of flatus and oral intake were resumed earlier in the SLAP group (2.88 vs. 3.68 days, P = 0.046 and 5.18 vs. 6.65 days, P < 0.001, respectively). The postoperative hospital stay was shorter in the SLAP group (10 vs. 15.4 days, P = 0.013).

CONCLUSIONS

In patients with left-sided malignant colon and rectal obstruction, laparoscopic surgery after SEMS could be safely performed with successful early postoperative outcomes.

PET/CT colonography for the preoperative evaluation of the colon proximal to the obstructive colorectal cancer

PURPOSE

This study was designed to evaluate the usefulness of 18-fluorodeoxyglucose positron emission tomography/computed tomography (PET/CT) colonography in preoperative diagnosis of the tumors proximal to obstructive colorectal cancers, which were defined as cancers that cannot be traversed colonoscopically.

METHODS

A whole-body PET/CT protocol for tumor staging and a protocol for CT colonography were integrated into one examination. No cathartic bowel preparation was used before this examination. Thirteen prospective patients with obstructive cancer were examined. We compared the detection rates for obstructive colorectal cancers and tumors proximal to the obstruction using air-inflated PET/CT colonography to intraoperative examinations, histopathologic outcome, and follow-up colonoscopy.

RESULTS

PET/CT colonography correctly identified all 13 primary obstructive colorectal cancers and all 2 synchronous colon cancers proximal to the obstruction. The two synchronous colon cancers detected at PET/CT colonography were confirmed and removed at single-stage surgical procedures. PET/CT colonography was able to localize all colorectal cancers precisely. There were no false-negative or false-positive proximal colorectal cancers by PET/CT colonography. Other preoperative examinations missed the synchronous colon cancers.

CONCLUSIONS

In patients with obstructive colorectal cancers, preoperative PET/CT colonography provided valuable anatomic and functional information of the entire colon to properly address surgery of colorectal cancer.

Emergency management of malignant acute left-sided colonic obstruction

INTRODUCTION

The management of acute left-sided colonic obstruction still remains a challenging problem despite significant progress.

METHODS

A literature search was undertaken using PubMed and the Cochrane Library regarding the options in emergency management of left-sided colonic obstruction focusing on outcomes such as mortality, morbidity, long-term prognosis and cost effectiveness.

DISCUSSION

Colonic stenting is the best option either for palliation or as a bridge to surgery. It reduces morbidity and mortality rate and the need for colostomy formation. Stenting is likely to be cost effective, but data are variable depending on the individual healthcare system. Nevertheless, surgical management remains relevant as colonic stenting has a small rate of failure, and it is not always available. There are various surgical options. One-stage primary resection and anastomosis is the preferred choice for low-risk patients. Intra-operative colonic irrigation has no proven benefit. Subtotal colectomy is useful in cases of proximal bowel damage or synchronous tumours. Hartmann's procedure should be reserved for high-risk patients. Simple colostomy has no role other than for use in very ill patients who are not fit for any other procedure.

Double colorectal cancer only diagnosed by computed tomographic colonography

A 58-year-old woman presented to her physician with rectal bleeding and intermittent diarrhea. Optical colonoscopy revealed a bulky tumor which was diagnosed as rectal cancer. She was referred to our institution for further evaluation and treatment. Slim optical colonoscopy showed an obstructive cancer in the rectosigmoid junction and no information of the proximal side of the obstruction. The patient then underwent computed tomographic (CT) colonography for further evaluation of the proximal side. Three-dimensional endoluminal ‘fly-through’ images revealed another protruded lesion in the proximal side of the obstruction. Diagnosis of synchronous double cancer was made by CT colonography. This CT data was not only used to create three-dimensional images but also to decide on a preoperative clinical staging. Laparoscopy-assisted high anterior resection was performed and T3 rectal cancer and T1 sigmoid colon cancer were confirmed in the resected specimen. Follow-up optical colonoscopy revealed no other tumors. CT colonography has recently become a popular preoperative examination tool with significant improvement in quality of image due to a rapid progress in computer technology. CT colonography correctly showed synchronous double cancer in our case and provided crucial information for planning surgery. We recommend that CT colonography should be used for evaluating the proximal side of obstructive colorectal cancer.

Colonic stent versus surgery for the management of acute malignant colonic obstruction: a decision analysis

BACKGROUND

Acute colonic obstruction because of advanced colonic malignancy is a surgical emergency.

AIM

To compare the clinical outcomes and cost-effectiveness of endoscopic self-expanding metal stent (SEMS) vs. surgery for emergent management of acute malignant colonic obstruction in patients with metastatic colorectal cancer over a 6-month period.

METHODS

Decision analysis was used to calculate the cost-effectiveness and success of two competing strategies in a hypothetical patient with metastatic colon cancer presenting with acute, malignant colonic obstruction: (i) emergent colonic stent (SEMS cohort); (ii) emergent surgical resection followed by diversion (surgery cohort).

RESULTS

Self-expanding metal stent resulted in a success and a lower mortality rate when compared to surgery over a 6-month period. Colonic SEMS was also associated with a lower mean cost per patient (USD 27,225 vs. USD 57,398). Mortality in the surgery group was 25 times that of the SEMS cohort. One- and two-way sensitivity analyses identified SEMS as the dominant strategy.

CONCLUSION

Colonic stent insertion is more effective and less costly than surgery for the management of colonic obstruction in patients with metastatic colon cancer.