Survival outcomes for patients with colorectal cancer with synchronous liver only metastasis

BACKGROUND

Colorectal cancer with synchronous liver-only metastasis is managed with a multimodal approach, however, optimal sequencing of modalities remains unclear.

METHODS

A retrospective review of all consecutive rectal or colon cancer cases with synchronous liver-only metastasis was conducted from the South Australian Colorectal Cancer Registry from 2006 to 2021. This study aimed to investigate how order and type of treatment modality affects overall survival.

RESULTS

Data of over 5000 cases were analysed (n = 5244), 1420 cases had liver-only metastasis. There were a greater number of colon than rectal primaries (N = 1056 versus 364). Colonic resection was the preferred initial treatment for the colon cohort (60%). In the rectal cohort, 30% had upfront resection followed by 27% that had chemo-radiotherapy as 1st line therapy. For the colon cohort, there was an improved 5-year survival with surgical resection as initial treatment compared to chemotherapy (25% versus 9%, P < 0.001). In the rectal cohort, chemo-radiotherapy as the initial treatment was associated with an improved 5-year survival compared to surgery or chemotherapy (40% versus 26% versus 19%, P = 0.0015). Patients who were able to have liver resection had improved survival, with 50% surviving over 5 years compared to 12 months in the non-resected group (P < 0.001). Primary rectal KRAS wildtype patients who underwent liver resection and received Cetuximab had significantly worse outcomes compared to KRAS wildtype patients who did not (P = 0.0007).

CONCLUSIONS

Where surgery is possible, resection of liver metastasis and primary tumour improved overall survival. Further research is required on the use of targeted treatments in patients undergoing liver resection.

Patterns of care and survival of first line anti-EGFR therapy; results from South Australian (SA) metastatic colorectal (mCRC) registry

e15577

Background: Treatment of mCRC has changed dramatically over the last decade with therapy guided by clinical and molecular features which include side of primary, RAS, BRAF and MMR status. For left sided RAS WT mCRC survival is optimized by using first line anti-EGFR anti-bodies combined with chemotherapy. This is reflected in modern guidelines. Methods: We aim to assess the uptake of first line anti-EGFR/chemotherapy combinations in patients with mCRC and assess for difference between cetuximab (C) and panitumumab (P) use from the SAmCRCR. The real word registry has collected data from all patients diagnosed with mCRC in SA prospectively since 2/2006. We compared RAS WT patients treated with chemo/bevacizumab (CB). Survival was analysed using the Kaplan Meier method. Results: Of the 5537 patients currently entered onto the registry, only 97 had RAS status recorded and had received first line anti-EGFR/chemotherapy (FaEC). 102 patients were RAS WT and received CB. Table summarises patient characteristics and median OS for FaEC (C or P) and CB. There was no statistical difference in survival for C v P (p = 0.055). Conclusions: When comparing C & P choice in first line therapy, C was more often combined with irinotecan/chemo. C patients had higher rate of left sided primary. There were lower rates of liver resection in patients treated with C which may explain the numerically lower median overall survival. An updated cohort analysis will be included to assess changes in practice over time.[Table: see text]

Postpancreatectomy Acute Pancreatitis (PPAP): Definition and Grading From the International Study Group for Pancreatic Surgery (ISGPS)

OBJECTIVE

The ISGPS aimed to develop a universally accepted definition for PPAP for standardized reporting and outcome comparison.

BACKGROUND

PPAP is an increasingly recognized complication after partial pancreatic resections, but its incidence and clinical impact, and even its existence are variable because an internationally accepted consensus definition and grading system are lacking.

METHODS

The ISGPS developed a consensus definition and grading of PPAP with its members after an evidence review and after a series of discussions and multiple revisions from April 2020 to May 2021.

RESULTS

We defined PPAP as an acute inflammatory condition of the pancreatic remnant beginning within the first 3 postoperative days after a partial pancreatic resection. The diagnosis requires (1) a sustained postoperative serum hyperamylasemia (POH) greater than the institutional upper limit of normal for at least the first 48 hours postoperatively, (2) associated with clinically relevant features, and (3) radiologic alterations consistent with PPAP. Three different PPAP grades were defined based on the clinical impact: (1) grade postoperative hyperamylasemia, biochemical changes only; (2) grade B, mild or moderate complications; and (3) grade C, severe life-threatening complications.

DISCUSSIONS

The present definition and grading scale of PPAP, based on biochemical, radiologic, and clinical criteria, are instrumental for a better understanding of PPAP and the spectrum of postoperative complications related to this emerging entity. The current terminology will serve as a reference point for standard assessment and lend itself to developing specific treatments and prevention strategies.

How to sustainably build capacity in quality improvement within a healthcare organisation: a deep-dive, focused qualitative analysis

Background

A key characteristic of healthcare systems that deliver high quality and cost performance in a sustainable way is a systematic approach to capacity and capability building for quality improvement. The aim of this research was to explore the factors that lead to successful implementation of a program of quality improvement projects and a capacity and capability building program that facilitates or support these.

Methods

Between July 2018 and February 2020, the Southern Adelaide Local Health Network (SALHN), a network of health services in Adelaide, South Australia, conducted three capability-oriented capacity building programs that incorporated 82 longstanding individual quality improvement projects. Qualitative analysis of data collected from interviews of 19 project participants and four SALHN Improvement Faculty members and ethnographic observations of seven project team meetings were conducted.

Results

We found four interacting components that lead to successful implementation of quality improvement projects and the overall program that facilitates or support these: an agreed and robust quality improvement methodology, a skilled faculty to assist improvement teams, active involvement of leadership and management, and a deep understanding that teams matter. A strong safety culture is not necessarily a pre-requisite for quality improvement gains to be made; indeed, undertaking quality improvement activities can contribute to an improved safety culture. For most project participants in the program, the time commitment for projects was significant and, at times, maintaining momentum was a challenge.

Conclusions

Healthcare systems that wish to deliver high quality and cost performance in a sustainable way should consider embedding the four identified components into their quality improvement capacity and capability building strategy.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12913-021-06598-8.

Metastasectomy and BRAF mutation; an analysis of survival outcome in metastatic colorectal cancer

BACKGROUND

Resection of oligometastases improves survival in metastatic colorectal cancer (mCRC). It is unclear whether the benefit is consistent for BRAF V600E mutant (MT) and wild type (WT) mCRC. This retrospective analysis explores the influence of BRAF MT on survival after metastasectomy.

METHODS

Overall survival (OS) and recurrence-free survival (RFS) for BRAF MT and WT mCRC were evaluated. Survival was also analyzed in the cohort of BRAF MT with or without metastasectomy.

RESULTS

Five hundred and thirteen patients who had undergone metastasectomy were identified, 6% were BRAF-MT. Median age 63. Median OS in BRAF MT vs WT: 25.7 vs 48.5 months (hazard ratio [HR] 1.95; 1.18-3.22). However, difference was not significant in a multivariate model. Right primary tumor, intact primary, >1 metastatic site, non-R0 resection, peritoneal metastasis, and synchronous metastasis were independent predictors of worse OS. Among 364 patients with RFS data there was no difference between BRAF MT and WT (16 vs 19 months, p=0.09). In another cohort of 158 BRAF-MT patients, OS was significantly better after metastasectomy compared to "no metastasectomy" (HR 0.34; 0.18-0.65, P= 0.001). Proficient mismatch repair status showed a trend toward worse survival after metastasectomy in BRAF MT (HR 1.71, P = 0.08).

CONCLUSION

OS did not differ after metastasectomy between BRAF MT and WT in a multivariate model. Median OS was >2 years in this study after metastasectomy among BRAFV600E MT patients suggesting a survival benefit of metastasectomy in this group where systemic therapeutic options are limited. Metastasectomy may be considered in carefully selected BRAF-MT patients.

Time from diagnosis to treatment of colorectal cancer in a South Australian clinical registry cohort: how it varies and relates to survival

OBJECTIVES

Some early studies indicated lower survival with longer time from diagnosis to cancer treatment, but others showed the reverse. We investigated time to treatment of colorectal cancer and associations with survival.

SETTING AND PARTICIPANTS

Clinical registry data for colorectal cancer cases diagnosed in 2000-2010 at four major public hospitals in South Australia and treated by surgery (n=1675), radiotherapy (n=616) and/or systemic therapy (n=1556).

DESIGN

A historic cohort design, with rank-order tests for ordinal clinical and sociodemographic predictors and multiple logistic regression for comparing time from diagnosis to treatment. Unadjusted Kaplan-Meier estimates and adjusted Cox proportional hazards regression were used to investigate disease-specific survival by time to treatment.

OUTCOME MEASURES

Time to treatment and survival from diagnosis to death from colorectal cancer.

RESULTS

Treatment (any type) commenced for 87% of surgical cases <60 days of diagnosis, with 80% having surgery within this period. Of those receiving radiotherapy, 59% began this treatment <60 days, and of those receiving systemic therapy, the corresponding proportion was 56%. Adjusted analyses showed treatment delay >60 days was more likely for rectal cancers, 2006-2010 diagnoses, residents of northern than other metropolitan regions and for surgery, younger ages <50 years and unexpectedly, those residing closer to metropolitan services. Adjusting for clinical and sociodemographic factors, and diagnostic year, better survival occurred in <2 years from diagnosis for time to treatment >30 days. Survival in the 3-10 years postdiagnosis generally did not differ by time to treatment, except for lower survival for any treatment >90 days for surgical cases.

CONCLUSIONS

The lower survival <2 years from diagnosis for treatment <30 days of diagnosis is consistent with other studies attributed to preferencing more complicated cases for earlier care. Lower 3-10 years survival for surgical cases first treated >90 days from diagnosis is consistent with previously reported U-shaped relationships.

Metastasectomy and BRAF mutation: An analysis of survival outcome in metastatic colorectal cancer

3531

Background: Surgical resection of oligometastases improves survival in metastatic colorectal cancer (mCRC). It is unclear whether such benefit is consistently observed for BRAF V600E mutant (MT) and wild type (WT) mCRC. We conducted a retrospective analysis to explore the influence of BRAF mutation status on survival outcomes after metastasectomy. Methods: Data collected from two large prospective population databases in Australia (Treatment of Recurrent and Advanced Colorectal Cancer (TRACC) and South Australian cancer registry). Overall survival (OS) and recurrence free survival (RFS) for BRAF MT and WT mCRC were evaluated by Kaplan-Meier method and compared by log-rank test. Results: 513 patients who had undergone metastasectomy were identified, 6% were BRAF MT. Median age 63. Metastasectomy rate was lower in BRAF MT (13 v 27%). In BRAF WT, 4% underwent resection of metastases (mets) in >1 organ at diagnosis and 5% had 3 or 4 metastasectomies versus none in BRAF MT. Median OS in BRAF MT v WT: 25.7 v 48.5 months (HR 1.95; 1.18-3.22). In a multivariate model adjusting for variables which were significant on univariate analysis, OS differences were not statistically significant. Right primary tumor, intact primary, >1 metastatic sites at diagnosis, non R0 resection, peritoneal mets and synchronous mets were independent predictors of worse OS. Among 364 patients with RFS data there was no difference between BRAF MT and WT (16 v 19 months, p=0.09). Rate of downsizing was higher with triplet chemo than doublet +/- bevacizumab or doublet/EGFR in BRAF WT (50 v 30%) as well as MT (33 v 11%). Conclusions: Median OS was > 2 years in BRAF MT V600E after metastasectomy in this study consistent with an OS benefit. OS did not differ after metastasectomy between BRAF MT and WT in a multivariate model. Presence of BRAF MT should not impact patient selection for metastasectomy.[Table: see text]

The Impact of Positive Resection Margins on Survival and Recurrence Following Resection and Adjuvant Chemotherapy for Pancreatic Ductal Adenocarcinoma

OBJECTIVE AND BACKGROUND

Local and distant disease recurrence are frequently observed following pancreatic cancer resection, but an improved understanding of resection margin assessment is required to aid tailored therapies.

METHODS

Analyses were carried out to assess the association between clinical characteristics and margin involvement as well as the effects of individual margin involvement on site of recurrence and overall and recurrence-free survival using individual patient data from the European Study Group for Pancreatic Cancer (ESPAC)-3 randomized controlled trial.

RESULTS

There were 1151 patients, of whom 505 (43.9%) had an R1 resection. The median and 95% confidence interval (CI) overall survival was 24.9 (22.9-27.2) months for 646 (56.1%) patients with resection margin negative (R0 >1 mm) tumors, 25.4 (21.6-30.4) months for 146 (12.7%) patients with R1<1 mm positive resection margins, and 18.7 (17.2-21.1) months for 359 (31.2%) patients with R1-direct positive margins (P < 0.001). In multivariable analysis, overall R1-direct tumor margins, poor tumor differentiation, positive lymph node status, WHO performance status ≥1, maximum tumor size, and R1-direct posterior resection margin were all independently significantly associated with reduced overall and recurrence-free survival. Competing risks analysis showed that overall R1-direct positive resection margin status, positive lymph node status, WHO performance status 1, and R1-direct positive superior mesenteric/medial margin resection status were all significantly associated with local recurrence.

CONCLUSIONS

R1-direct resections were associated with significantly reduced overall and recurrence-free survival following pancreatic cancer resection. Resection margin involvement was also associated with an increased risk for local recurrence.

Evidence that decreased expression of sinusoidal bile acid transporters accounts for the inhibition by rapamycin of bile flow recovery following liver ischemia

Rapamycin is employed as an immunosuppressant following organ transplant and, in patients with hepatocellular carcinoma, to inhibit cancer cell regrowth following liver surgery. Preconditioning the liver with rapamycin to induce the expression of antioxidant enzymes is a potential strategy to reduce ischemia reperfusion (IR) injury. However, pre-treatment with rapamycin inhibits bile flow, especially following ischemia. The aim was to investigate the mechanisms involved in this inhibition. In a rat model of segmental hepatic ischemia and reperfusion, acute administration of rapamycin by intravenous injection did not inhibit the basal rate of bile flow. Pre-treatment of rats with rapamycin for 24 h by intraperitoneal injection inhibited the expression of mRNA encoding the sinusoidal influx transporters Ntcp, Oatp1 and 2 and the canalicular efflux transporter Bsep, and increased expression of canalicular Mrp2. Dose-response curves for the actions of rapamycin on the expression of Bsep and Ntcp in cultured rat hepatocytes were biphasic, and monophasic for effects on Oatp1. In cultured tumorigenic H4IIE liver cells, several bile acid transporters were not expressed, or were expressed at very low levels compared to hepatocytes. In H4IIE cells, rapamycin increased expression of Ntcp, Oatp1 and Mrp2, but decreased expression of Oatp2. It is concluded that the inhibition of bile flow recovery following ischemia observed in rapamycin-treated livers is principally due to inhibition of the expression of sinusoidal bile acid transporters. Moreover, in tumorigenic liver tissue the contribution of tumorigenic hepatocytes to total liver bile flow is likely to be small and is unlikely to be greatly affected by rapamycin.

The survival outcome of patients with metastatic colorectal cancer based on the site of metastases and the impact of molecular markers and site of primary cancer on metastatic pattern

BACKGROUND

Pattern of spread in patients with metastatic colorectal cancer (mCRC) is variable and may reflect different biology in subsets of patients. This is a retrospective study to explore the outcome of patients with mCRC based on their site of metastasis at diagnosis and to explore the association between tumor characteristics [KRAS/RAS, BRAF, mismatch repair (MMR) status, site of primary] and the site of metastasis.

METHODS

Patients from two Australian databases were divided into six groups based on site of metastasis at time of diagnosis of metastatic disease; lung-only, liver-only, lymph node-only or any patients with brain, bone or peritoneal metastases. Primary endpoint was overall survival (OS) of each cohort compared with the rest of the population. A Mantel-Haenszel chi-squared test used to explore the association between site of metastasis and selected tumor characteristics.

RESULTS

Five thousand nine hundred and sixty-seven patients were included. In a univariate analysis, median OS was significantly higher when metastases were limited to lung or liver and shorter for those with brain, bone or peritoneal metastases (p < .001) in both datasets. BRAF mutation was strongly associated with peritoneal metastases (relative risk = 1.8, p < .001) with lower incidence of lung (RR = 0.3, p = .004) and liver (RR = 0.7, p = .005) limited metastases. Lung-only metastases were more frequent with KRAS/RAS mutation (RR = 1.4, p = .007). Left colon tumors were associated with bone (RR = 1.6, p < .001) and lung-only metastases (RR = 2.3, p = .001) while peritoneal spread was less frequent compared with right colon tumors (RR = 0.6, p < .001). Rectal cancer was associated with brain, bone and lung metastases (RR = 1.7; p = .002, 1.7; p < .001, 2.0; p < .001). Liver-only metastases were less frequent in deficient MMR tumors (RR = 0.7, p = .01).

CONCLUSION

Survival duration with mCRC is related to the site of metastases with lung limited disease showing a more favorable survival outcome compared to other single metastatic site disease. The BRAF mutation and primary rectal cancer were associated with poor prognostic metastatic sites.

Rapamycin induces the expression of heme oxygenase-1 and peroxyredoxin-1 in normal hepatocytes but not in tumorigenic liver cells

Rapamycin (sirolimus) is employed as an immunosuppressant following liver transplant, to inhibit the re-growth of cancer cells following liver resection for hepatocellular carcinoma (HCC), and for the treatment of advanced HCC. Rapamycin also induces the expression of antioxidant enzymes in the liver, suggesting that pretreatment with the drug could provide a potential strategy to reduce ischemia reperfusion injury following liver surgery. The aim of this study was to further investigate the actions of rapamycin in inducing expression of the antioxidant enzymes heme oxygenase-1 (HO-1) and peroxiredoxin-1 (Prx-1) in normal liver and in tumorigenic liver cells. A rat model of segmental hepatic ischemia and reperfusion, cultured freshly-isolated rat hepatocytes, and tumorigenic H4IIE rat liver cells in culture were employed. Expression of HO-1 and Prx-1 was measured using quantitative PCR and western blot. Rapamycin pre-treatment of normal liver in vivo or normal hepatocytes in vitro led to a substantial induction of mRNA encoding HO-1 and Prx-1. The dose-response curve for the action of rapamycin on mRNA expression was biphasic, showing an increase in expression at 0 - 0.1 μM rapamycin but a decrease from maximum at concentrations greater than 0.1 μM. By contrast, in H4IIE cells, rapamycin inhibited the expression of HO-1 and Prx-1 mRNA. Oltipraz, an established activator of transcription factor Nrf2, caused a large induction of HO-1 and Prx-1 mRNA. The dose response curve for the inhibition by rapamycin of HO-1 and Prx-4 mRNA expression, determined in the presence of oltipraz, was monophasic with half maximal inhibition at about 0.01 μM. It is concluded that, at concentrations comparable to those used clinically, pre-treatment of the liver with rapamycin induces the expression of HO-1 and Prx-1. However, the actions of rapamycin on the expression of these two antioxidant enzymes in normal hepatocytes are complex and, in tumorigenic liver cells, differ from those in normal hepatocytes. Further studies are warranted to evaluate preconditioning the livers of patients subject to liver resection or liver transplant with rapamycin as a viable strategy to reduce IR injury following liver surgery.

Prospective evaluation of the International Study Group for Liver Surgery definition of post hepatectomy liver failure after liver resection: an international multicentre study

BACKGROUND

The International Study Group for Liver Surgery (ISGLS) definition of post hepatectomy liver failure (PHLF) was developed to be consistent, widely applicable, and to include severity stratification. This international multicentre collaborative study aimed to prospectively validate the ISGLS definition of PHLF.

METHODS

11 HPB centres from 7 countries developed a standardised reporting form. Prospectively acquired anonymised data on liver resections performed between 01 July 2010 and 30 June 2011 was collected. A multivariate analysis was undertaken of clinically important variables.

RESULTS

Of the 949 patients included, 86 (9%) met PHLF requirements. On multivariate analyses, age ≥70 years, pre-operative chemotherapy, steatosis, resection of >3 segments, vascular reconstruction and intraoperative blood loss >300 ml significantly increased the risk of PHLF. Receiver operator curve (ROC) analysis of INR and serum bilirubin relationship with PHLF demonstrated post-operative day 3 and 5 INR performed equally in predicting PHLF, and day 5 bilirubin was the strongest predictor of PHLF. Combining ISGLS grades B and C groups resulted in a high sensitivity for predicting mortality compared to the 50-50 rule and Peak bilirubin >7 mg/dl.

CONCLUSIONS

The ISGLS definition performed well in this prospective validation study, and may be the optimal definition for PHLF in future research to allow for comparability of data.

Proposed standards for reporting outcomes of treating biliary injuries

BACKGROUND

There is no standard nor widely accepted way of reporting outcomes of treatment of biliary injuries. This hinders comparison of results among approaches and among centers. This paper presents a proposal to standardize terminology and reporting of results of treating biliary injuries.

METHODS

The proposal was developed by an international group of surgeons, biliary endoscopists and interventional radiologists. The method is based on the concept of "patency" and is similar to the approach used to create reporting standards for arteriovenous hemodialysis access.

RESULTS

The group considered definitions and gradings under the following headings: Definition of Patency, Definition of Index Treatment Periods, Grading of Severity of Biliary Injury, Grading of Patency, Metrics, Comparison of Surgical to Non Surgical Treatments and Presentation of Case Series.

CONCLUSIONS

A standard procedure for reporting outcomes of treating biliary injuries has been produced. It is applicable to presenting results of treatment by surgery, endoscopy, and interventional radiology.

Liver resection for colorectal cancer metastases: a comparison of outcomes over time in South Australia

BACKGROUND

The aim of the current study was to assess outcomes following liver resection in metastatic CRC (mCRC) in South Australia across two study periods (pre-2006 versus post-2006).

METHODS

The South Australian (SA) Clinical Registry for mCRC maintains data prospectively on all patients in SA with mCRC diagnosed from 01 February 2006. This data was linked with a prospectively collated database on liver resections for mCRC from 01/01/1992 to 01/02/2006. The primary end point was overall survival.

RESULTS

757 patients underwent liver resection for mCRC. Liver resection was performed on 286 patients pre-2006 and 471 patients post-2006. The median age of the study population was 62 years, and this was similar across both eras. Overall survival was significantly better in the post-2006 era (hazard ratio HR = 0.45, p = 0.001). Complications (59% pre-2006 versus 23% post-2006) and transfusion rates (34% pre-2006 versus 2% post-2006) were significantly higher in the pre-2006 era. Repeat liver resection rates were significantly higher in the post-2006 era (1% pre-2006 versus 10% post-2006).

CONCLUSIONS

Outcomes following liver resection for mCRC have improved over time, with significantly better overall survival in the post-2006 era compared to pre-2006.

Tokyo Guidelines 2018: management bundles for acute cholangitis and cholecystitis

Management bundles that define items or procedures strongly recommended in clinical practice have been used in many guidelines in recent years. Application of these bundles facilitates the adaptation of guidelines and helps improve the prognosis of target diseases. In Tokyo Guidelines 2013 (TG13), we proposed management bundles for acute cholangitis and cholecystitis. Here, in Tokyo Guidelines 2018 (TG18), we redefine the management bundles for acute cholangitis and cholecystitis. Critical parts of the bundles in TG18 include the diagnostic process, severity assessment, transfer of patients if necessary, and therapeutic approach at each time point. Observance of these items and procedures should improve the prognosis of acute cholangitis and cholecystitis. Studies are now needed to evaluate the dissemination of these TG18 bundles and their effectiveness. Free full articles and mobile app of TG18 are available at: http://www.jshbps.jp/modules/en/index.php?content_id=47. Related clinical questions and references are also included.

Bevacizumab and its impact on survival for patients receiving subsequent anti-EGFR therapy: Updated results from the SA metastatic CRC registry

3569

Background: Debate exists as to whether first line bevacizumab effects subsequent sensitivity to anti-EGFR therapy. Authors hypothesize that initial anti-VEGF therapy may induce biological changes that then increase the risk of acquired resistance to subsequent EGFR inhibitors. Methods: A retrospective cohort study was performed to compare the characteristics and survival of patients who were treated with an anti-EGFR therapy 2nd line and beyond by two groups defined by the first line therapy; 1. chemotherapy (chemo) plus bevacizumab (bev) and 2. chemo alone. Survival for this analysis is from the time of commencing first line chemotherapy and secondly from anti-EGFR therapy. Pearson chi test analysis was performed to determine whether receiving first line bev was associated with worse overall survival (OS). Results: 348 mCRC patients who received chemo with or without bev and then an anti-EGFR therapy were studied. Patient characteristics are summarised in the table below. The significant differences between group 1. Vs. 2. were as follows; median age 63.8 years v 67.9 years (p = 0.005), lower use of single agent FU 6.4% v 19.2%, KRAS status not tested (reflecting the practice changes over time) 19.3% v 39.2%, KRAS MT 2% v 4%, and where BRAF MT status was known (11%); BRAF MT rate 23% v 0. Median OS for the 2 groups was 34.2 months, and 28.2 months respectively (p = 0.12) from first line therapy. Median OS for patients who underwent single agent anti-EGFR as subsequent therapy was also not significantly different, 31.1 months group 1 (n = 60) versus 27.7 months group 2 (n = 85), p = 0.52. Results based on commencement of anti-EGFR therapy are under way. Conclusions: Survival was not significantly different between the two groups, and the trend was towards higher OS with chemo plus bev suggesting that in our registry population, bev administration in first line therapy with chemo did not lead to a worse outcome overall for those patients subsequently receiving anti-EGFR therapy, either with chemotherapy or as a single agent. Updated results from commencement of anti-EGFR therapy will give further insights and will be presented at the meeting.

Good outcomes of liver transplantation for hepatitis C at a low volume centre

BACKGROUND AND AIMS

Concerns exist about outcomes of liver transplantation (LT) from low volume centres, especially for hepatitis C (HCV) patients. The aim of the study was to assess patient outcomes as well as their predictors post LT for HCV in a small volume Australian unit (< 25 LTs/year), comparing these with the average outcomes obtained from national and international transplant registries. Patients transplanted for HCV at the South Australian Liver Transplant Unit between 1992 and 2012 were studied. Outcomes assessed were patient and graft survival at 1,3, and 5 years. Factors independently associated with the outcomes were assessed using Cox regression model.

RESULTS

1, 3, and 5-year patient survival for HCV patients was 95.2, 82.9, and 78.2%, graft survival were 93.7, 80.1, and 75.5% respectively. The total follow-up time observed was 299.9 years amongst 61 patients in which there were 16 deaths. The expected number of deaths was 40.4 and the standardized mortality ratio 0.40 (95% CI = 0.24, 0.65). These results compared favourably to those obtained from the SRTR registry. Variables independently associated with lower patient survival: donor age (HR = 1.06, 95% CI 1.02 - 1.11; P = 0.003), and post LT cytomegalovirus (CMV) disease requiring treatment (HR = 4.03, 95% CI 1.48 - 10.92;P = 0.06).

CONCLUSION

In conclusion, high rates of patient and graft survival for HCV liver transplantation can be obtained in a small volume unit. Young donor age and lack of CMV disease post-transplant were associated with better outcomes. Institutional factors may be influential determinants of outcomes.

Bevacizumab and its impact on survival for patients receiving subsequent anti-EGFR therapy: Results from the South Australian metastatic colorectal cancer registry

754

Background: Questions over the impact of 1st line bevacizumab on subsequent sensitivity to anti-EGFR therapy have been raised with authors hypothesizing that up-front anti-VEGF agent’s use influences biological changes that increase the risk of acquired resistance to subsequent EGFR inhibitors. Methods: Aretrospective cohort study was performed to compare the characteristics and survival of patients who were treated with an anti-EGFR therapy 2nd line and beyond by two groups defined by the 1st line therapy; 1. chemotherapy (chemo) plus bevacizumab (bev) and 2. chemo alone. Pearson chi test analysis was performed to determine whether receiving 1st line bev was associated with worse OS. Results: 348 mCRC patients who received chemo with or without bev and then an anti-EGFR therapy were studied. Patient characteristics are summarised in table. The significant differences between group 1. Vs. 2. were as follows; median age, lower use of single agent FU, KRAS status not tested, and where BRAF MT status was known (11%); BRAF MT rate. Median OS for the 2 groups was 34.2 mths, and 28.2 mths respectively (p = 0.12). Conclusions: Survival was not significantly different between the two groups, and the trend was towards higher OS with chemo plus bev suggesting that in our registry population, bev administration in first line therapy with chemo did not lead to a worse outcome for those patients subsequently receiving anti-EGFR therapy. [Table: see text]

Nonagenarian patients with metastatic colorectal cancer: Results from the South Australian metastatic colorectal cancer registry

752

Background: With improved healthcare we now face an ageing population worldwide. More patients with metastatic colorectal cancer (mCRC) will present at advanced age. Patients with mCRC now have the potential of living longer due to surgery, chemotherapeutic agents and monoclonal antibodies. Australian data (2011) indicated 1.3% of the population are aged over 90 years*. Medical oncologists are now being referred patients in their 90’s and the optimal management for this group is unknown. Methods: The population based South Australian Clinical Registry for mCRC includes all patients with metastatic CRC diagnosed since the 1st February 2006. We examined cancer characteristics, treatments administered and outcomes for patients aged > 90 years. Results: 130 patients of 4199 (3%) were aged 90 years or older. The median age was 92.1 years (range 90-104.8 years). 61% were female, 70% presented with synchronous disease. Organ involvement was as follows; 58% liver, 32% lung, 8% peritoneal and 7% bone. Primary site was: right 46%, left 28%, rectum 20%, unknown 6%. Only 4 patients had KRAS testing (all WT). 44.6% overall have had no surgery for their CRC primary. 24% of those with synchronous disease at diagnosis had resection of primary lesion and 3% had stoma formed for palliation. One patient had lung resection for metastasis. Only 4 patients received systemic therapy (age range 90-93). Lines of therapy delivered; one in 2 patients, two lines in one and 4 lines in one. Aside single agent 5FU, combination therapy (oxaliplatin/FU+/- bevacizumab) was given to two patients and cetuximab single agent in 2 (WT one, unknown one). The median survival overall was 3 months (95% CI 1.4-4.6 months). Two year survival was 10%. Conclusions: This analysis gives us some insight into the management of the very old. Female sex and right sided cancers are more frequent. Systemic therapy is rarely offered and the outlook is poor. Further research to understand whether active therapy is possible or warranted in this age group should be considered. *http://www.abs.gov.au/ausstats/abs@.nsf

BRAF Mutation Testing and Metastatic Colorectal Cancer in the Community Setting: Is There an Urgent Need for More Education?

BACKGROUND

Patients with metastatic colorectal cancer (mCRC) with BRAF mutation (BRAF MT) generally have a poorer prognosis. BRAF MT may also have implications for treatment strategy. Despite this, inclusion of BRAF in routine molecular testing varies. Here we report the frequency of BRAF reporting in the South Australian (SA) mCRC registry reflecting community practice, together with the survival outcomes based on mutation status.

METHODS

The SA population-based mCRC registry was analysed to assess the number of patients where a BRAF MT result was available. The patient characteristics are reported and overall survival was analysed using the Kaplan-Meier method.

RESULTS

Of the 3639 patients who have been entered in the registry, only 6.2% (227) have BRAF MT results available. Of the patients tested, the BRAF MT rate is 12.7%. The mutation rate was highest in rightsided primary; right colon 23 versus left colon 8.9% and rectum 7%. There was no significant difference in median age or male/female proportion. The median overall survival (mOS) for BRAF MT versus wild-type (WT) patients is 14.0 versus 32.9 months (p = 0.003). For patients who have chemotherapy (plus or minus surgery) the mOS is 14.6 months BRAF MT versus 36.1 months (p ≤ 0.001) WT. Liver or lung resection was performed on only 8% of the BRAF MT group versus 26.5% of the WT group.

CONCLUSION

Results in a population setting confirm our understanding that BRAF MT is more frequently right sided and of lower frequency in rectal cancer. Survival is lower for patients with mCRC that have BRAF MT, regardless of the therapy. BRAF testing is currently performed infrequently in an Australian setting despite its importance as a significant prognostic factor, and the implications for alternate therapeutic approaches.

Association of BMI with overall survival in patients with mCRC who received chemotherapy versus EGFR and VEGF-targeted therapies

Although a raised body mass index (BMI) is associated with increased risk of colorectal cancer (CRC) and recurrence after adjuvant treatment, data in the metastatic setting is limited. We compared overall survival (OS) across BMI groups for metastatic CRC, and specifically examined the effect of BMI within the group of patients treated with targeted therapies (TT). Retrospective data were obtained from the South Australian Registry for mCRC from February 2006 to October 2012. The BMI at first treatment was grouped as underweight <18.5 kg/m², Normal = 18.5 to <25 kg/m², Overweight = 25 to <30 kg/m², Obese I = 30 to <35 kg/m², Obese II ≥35 kg/m². Of 1174 patients, 42 were underweight, 462 overweight, 175 Obese I, and 77 Obese II. The OS was shorter for patients who were underweight and overweight compared to normal (OS 13.7 and 22.3 vs. 24.1 months, respectively, hazard ratio [HR] 2.21 and 1.23). The adjusted median OS was longer for normal versus overweight or obese I patients receiving chemotherapy + targeted therapy (35.7 vs 25.1 or 22.8 months, HR 1.59 and 1.63, respectively) with no difference in OS for chemotherapy alone. On breakdown by type of targeted therapy, overweight and obese I patients had a poorer outcome with Bevacizumab. The BMI is predictive of a poorer outcome for underweight and overweight patients in the whole population. Of those receiving chemotherapy and targeted therapy, BMI is an independent predictor for OS for overweight and obese I patients, specifically for those treated with Bevacizumab. Patients who are overweight or obese (group I) may be a target group for lifestyle and nutrition advice to improve OS with TT.

Survival for patients with resectable lung metastatic colorectal cancer (mCRC)

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Background: Hepatic resection for CRC metastasis is now considered a standard of care and perioperative chemotherapy may improve outcomes. Resection of metastasis isolated to lung is also considered potentially curable, although there is still some variation in recommendations and no evidence for perioperative or adjuvant chemotherapy. Here, we explore patient characteristics and outcomes for patients undergoing lung resection for mCRC, with the liver resection group as the comparator. Methods: SA mCRC registry data were analysed to assess patient characteristics and survival outcomes between patients suitable for lung or liver resection. K-M survival analysis was used to assess OS. Results: 3,241 patient are registered on the database. 102 (3.1%) patients were able to undergo a lung resection compared to 420 (12.9%) a liver resection. Of the lung resection patients, 21% initially presented with liver only disease, 11% both lung and liver, and 7% brain or pelvic disease. 62 (61%) presented with lung only disease. Of these patients, 79% went straight to surgery and 34% had lung resection as the only intervention. When comparing the groups, they were balanced for age and sex, liver v lung; 67.7 years v 69.5 years, 63.6% v 57.8% male. There was no difference in pathological grade or KRAS MT rate when tested (36% liver v 32% lung). Compared to patients undergoing liver resection, those having lung resection were more likely to be metachronous (75.5% v 44%, p=<0.0001) and have a rectal primary (43.1% v 30.7%, p=0.017). Chemotherapy for metastatic disease was given more often in liver resection patients (76.9% v 53.9%, p=0.17). Median overall survival is not reached for both arms and the lower hazard rate for lung than liver resection does not approach statistical significance (HR 0.82, 95% CI 0.54-1.24, p=0.33). The 3 and 5 year survival liver v lung as follows; 77% v 81% and 62% v 70%. Conclusions: Lung resection occurs less frequently than liver resection for metastatic disease as expected. There was no statistical difference in overall survival in patients suitable for lung or liver resection. These data support the potential for long term survival with resection of both lung and liver metastasis in mCRC.

Equivalence of outcomes for rural and metropolitan patients with metastatic colorectal cancer in South Australia

OBJECTIVE

To compare the management and outcome of rural and metropolitan patients with metastatic colorectal cancer (mCRC) in South Australia.

DESIGN, SETTING AND PATIENTS

Retrospective cohort study of patients with mCRC submitted to the South Australian mCRC registry between 2 February 2006 and a cut-off date of 28 May 2012.

MAIN OUTCOME MEASURES

Differences in oncological and surgical management and overall survival (calculated using the Kaplan-Meier method) between city and rural patients.

RESULTS

Of 2289 patients, 624 (27.3%) were rural. There was a higher proportion of male patients in the rural cohort, but other patient characteristics did not significantly differ between the cohorts. Equivalent rates of chemotherapy administration between city and rural patients were observed across each line of treatment (first line: 56.0% v 58.3%, P = 0.32; second line: 23.3% v 22.5%, P = 0.78; and third line: 10.1% v 9.3%, P = 0.69). A higher proportion of city patients received combination chemotherapy in the first-line setting (67.4% v 59.9%; P = 0.01). When an oxaliplatin combination was prescribed, oral capecitabine was used more frequently in rural patients (22.9% v 8.4%; P < 0.001). No significant difference was seen in rates of hepatic resection or other non-chemotherapy treatments between cohorts. Median overall survival was equivalent between city and rural patients (14.6 v 14.9 months, P = 0.18).

CONCLUSION

Patterns of chemotherapy and surgical management of rural patients with mCRC in SA are equivalent to their metropolitan counterparts and lead to comparable overall survival. The centralised model of oncological care in SA may ensure rural patients gain access to optimal care.

Prospective evaluation of the International Study Group for Liver Surgery definition of bile leak after a liver resection and the role of routine operative drainage: an international multicentre study

BACKGROUND

The International Study Group for Liver Surgery (ISGLS) proposed a definition for bile leak after liver surgery. A multicentre international prospective study was designed to evaluate this definition.

METHODS

Data collected prospectively from 949 consecutive patients on specific datasheets from 11 international centres were collated centrally.

RESULTS

Bile leak occurred in 69 (7.3%) of patients, with 31 (3.3%), 32 (3.4%) and 6 (0.6%) classified as grade A, B and C, respectively. The grading system of severity correlated with the Dindo complication classification system (P < 0.001). Hospital length of stay was increased when bile leak occurred, from a median of 7 to 15 days (P < 0.001), as was intensive care stay (P < 0.001), and both correlated with increased severity grading of bile leak (P < 0.001). 96% of bile leaks occurred in patients with intra-operative drains. Drain placement did not prevent subsequent intervention in the bile leak group with a 5-15 times greater risk of intervention required in this group (P < 0.001).

CONCLUSION

The ISGLS definition of bile leak after liver surgery appears robust and intra-operative drain usage did not prevent the need for subsequent drain placement.

Does the primary site of colorectal cancer impact outcomes for patients with metastatic disease?

BACKGROUND

Previous reports have described differences in biology and outcome for colorectal cancer based on whether the primary is right or left sided. Further division by right, left, and rectum or even exact primary site has also been explored. Possible differences in response to biological agents have also been reported based on side of primary lesion.

METHODS

We explored the South Australian registry for metastatic colorectal cancer to assess if there were any differences in patient characteristics, prognostic markers, and treatment received and outcomes based on whether the primary was right or left sided. We also explored if differences exist based on left colon and rectum and by exact primary site.

RESULTS

Two thousand nine hundred seventy-two patients were analyzed. Thirty-five percent had a right-sided primary. The median overall survival for the entire group right versus left was 9.6 versus 20.3 months (P < .001). Multivariate analysis confirmed side of primary as an independent prognostic factor. For the group that had active therapy, defined as chemotherapy (± metastasis resection), median overall survival was right, 18.2 months; and left, 29.4 months (P < .001). Importantly, we found no suggestion of major differences if left side was divided by left colon and rectum, and trends by individual site still supported a left and right division.

CONCLUSIONS

Patients with a right-sided primary have more negative prognostic factors and indeed have inferior outcomes compared with those with a left-sided primary. Our data with further breakdown by exact site still favor a simple left-versus-right division moving forward for metastatic colorectal cancer.

The management of colorectal cancer (CRC) liver metastases with yttrium-90 microspheres (Y90): The south Australian (SA) experience

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Background: Treatment of CRC liver metastases with Y90 may provide a survival benefit but remains under investigation. We report on the accumulated SA clinical experience of using Y90 in the treatment of patients with metastatic CRC. Methods: Data from the SA mCRC Database was used to analyse the baseline characteristics of patients treated with Y90 to determine patterns of care. Safety and adverse outcomes, tumour response, disease progression, and survival were also examined. Survival outcomes were analysed using Kaplan Meier estimates, and chi square testing used for comparisons. Results: 33 patients received Y90, with median age 67 (range 33-83), 25 male, 29 colon/4 rectal primary, 25 hepatic only metastatic disease. Systemic therapy pre Y90 was as follows; nil=4, 1 line=7, 2 lines=9, ≥3=11, unknown=2. There were no immediate Grade III/IV adverse events, though immediate toxicity occurred in 9 patients; liver capsule pain in 8, chest pain and vomiting in 1 patient. Following Y90 treatment, radiologist reported response showed: measurable reduction =3 (ORR 9%), SD=4, PD=20, and 1 patient unknown. Treatment beyond Y90; nil=16 patients, 1 line=7, 2 lines=7 and >3=2 patients. Data on hepatic progression free survival (PFS) and overall PFS is currently being analysed. Median survival from the time of Y90 treatment was 10.3 months. Conclusions: Our data show Y90 use in SA occurs most often after 2 lines of chemotherapy. No immediate grade 3/4 toxicity was encountered. Survival for this select group appears longer than expected. Data on mOS from delivery of Y90, hepatic PFS and overall PFS for subgroups will be reported.

Right (R) or left (L) primary site of colorectal cancer and outcomes for metastatic colorectal cancer (mCRC): Results from the south Australian registry of mCRC

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Background: Previous reports have described differences in biology and outcome based on whether the primary is R or L sided. Possible differences in response to biological agents have also been reported based on side of primary lesion (SY Brule et al., JCO31, 2013 (supp #3528). Methods: We explored the SA mCRC registry to assess if there were any differences in patient characteristics, treatment received and outcomes based on whether the primary was R (caecum to transverse colon) or L (splenic flexure to rectum) sided (JA Bufill, Ann Int Med. 113, 1990, 779-788). KM was used for survival outcomes and Cox proportional hazards regression modeling was used to assess defined prognostic markers. Results: 2,877 patients were analysed. 33% had R sided primary. Major differences between R and L respectively are as follows; Female 51.3% vs. 37.9% (p = <0.0001), Med age 75.8 yrs vs. 70.5yrs (p = <0.0001), poorly differentiated pathology 34.3% vs. 20.8% (p = <0.0001), KRAS mutation 48% vs. 37% (p = 0.023), and liver surgery 10.5% vs. 16.3% (p = <0.0001). Analysis of chemotherapy (defined as either cytotoxic and/or molecular-targeted) revealed similar rates of first-line therapy, but differences in rates of therapy beyond first-line R vs. L respectively; second-line 46% vs. 60.4%, third-line 17% vs. 30%, fourth-line 7% vs. 13%. There was however no difference in single agent vs. combination first-line therapy. The median overall survival (mOS) for the entire group R vs. L was 9.6 vs. 20.3 months (p <0.0001). For the group who had active therapy defined as chemotherapy (+/- metastasis resection), mOS was R 18.2 months vs. L 29.4 months (p <0.0001). For those (n = 123) who underwent liver resection (+/- chemotherapy) mOS was 6.2 years for both R and L (p = 0.32). Patients who were treated with only chemotherapy, the mOS was 10.7 mths vs. 15.3 mths for R v L (p = 0.0005). Conclusions: Patients with R sided primary have more negative prognostic factors and indeed have inferior outcomes when compared with those with a L sided primary. This did not appear to be the case for patients who were suitable for hepatic surgery.

Liver only metastatic disease in patients with metastatic colorectal cancer: impact of surgery and chemotherapy

BACKGROUND

Metastatectomy in colorectal cancer (CRC) is now a standard of care with improved survival reported. Conversion chemotherapy has increased the population who are suitable for surgery. Here we assess patterns of care and treatment outcome in liver only metastases in South Australia using the clinical registry for advanced CRC.

METHODS

We analysed the outcomes for patients with liver only metastatic involvement from the SA Metastatic CRC Database with the aim to investigate the role of chemotherapy on liver resection and outcome in comparison to liver resection only and chemotherapy without liver resection. Patients who had no therapy or non-surgical liver interventions were excluded for this analysis.

RESULTS

One thousand nine hundred and eight patients were available for analysis, 687 (36%) had liver only metastatic disease and 455 (24%) had active therapy as defined. In total 54.2% (247/455) had chemotherapy alone, 19.1% (87/455) had liver resection alone, and 26.6% (121/455) had combined treatment. The three-year survival for chemotherapy, resection and combined treatment subgroups is 19.5%, 73.8% and 73.7%, respectively. The addition of chemotherapy to surgery did not improve survival. Switching chemotherapy was associated with a poorer outcome; three-year overall survival for chemotherapy switch was 62.5%, compared with same regimen pre- and post-74%, and chemo post-resection 80%.

CONCLUSION

Liver only metastatic disease is common in CRC and patients undergoing liver resection have improved long-term survival. Survival for a combined approach of chemotherapy and hepatic resection is similar to surgery alone. Patients not suitable for surgery with liver only disease have a poorer prognosis highlighting the need for improved liver-directed therapies and attempts to covert non-resectable to resectable disease if possible.

TG13 guidelines for diagnosis and severity grading of acute cholangitis (with videos)

Since the publication of the Tokyo Guidelines for the management of acute cholangitis and cholecystitis (TG07), diagnostic criteria and severity assessment criteria for acute cholangitis have been presented and extensively used as the primary standard all over the world. However, it has been found that there are crucial limitations in these criteria. The diagnostic criteria of TG07 do not have enough sensitivity and specificity, and its severity assessment criteria are unsuitable for clinical use. A working team for the revision of TG07 was organized in June, 2010, and these criteria have been updated through clinical implementation and its assessment by means of multi-center analysis. The diagnostic criteria of acute cholangitis have been revised as criteria to establish the diagnosis where cholestasis and inflammation demonstrated by clinical signs or blood test in addition to biliary manifestations demonstrated by imaging are present. The diagnostic criteria of the updated Tokyo Guidelines (TG13) have high sensitivity (87.6 %) and high specificity (77.7 %). TG13 has better diagnostic capacity than TG07. Severity assessment is classified as follows: Grade III: associated with organ failure; Grade II: early biliary drainage should be conducted; Grade1: others. As for the severity assessment criteria of TG07, separating Grade II and Grade I at the time of diagnosis was impossible, so they were unsuitable for clinical practice. Therefore, the severity assessment criteria of TG13 have been revised so as not to lose the timing of biliary drainage or treatment for etiology. Based on evidence, five predictive factors for poor prognosis in acute cholangitis--hyperbilirubinemia, high fever, leukocytosis, elderly patient and hypoalbuminemia--have been extracted. Grade II can be diagnosed if two of these five factors are present. Free full-text articles and a mobile application of TG13 are available via http://www.jshbps.jp/en/guideline/tg13.html.

TG13 surgical management of acute cholecystitis

BACKGROUND

Laparoscopic cholecystectomy is now accepted as a surgical procedure for acute cholecystitis when it is performed by an expert surgeon. There are several lines of strong evidence, such as randomized controlled trials (RCTs) and meta-analyses, supporting the introduction of laparoscopic cholecystectomy for patients with acute cholecystitis. The updated Tokyo Guidelines 2013 (TG13) describe the surgical treatment for acute cholecystitis according to the grade of severity, the timing, and the procedure used for cholecystitis in a question-and-answer format using the evidence concerning surgical management of acute cholecystitis.

METHODS AND MATERIALS

Forty-eight publications were selected for a careful examination of their full texts, and the types of surgical management of acute cholecystitis were investigated using this evidence. The items concerning the surgical management of acute cholecystitis were the optimal surgical treatment for acute cholecystitis according to the grade of severity, optimal timing for the cholecystectomy, surgical procedure used for cholecystectomy, optimal timing of the conversion of cholecystectomy from laparoscopic to open surgery, and the complications of laparoscopic cholecystectomy.

RESULTS

There were eight RCTs and four meta-analyses concerning the optimal timing of the cholecystectomy. Consequently, it was found that cholecystectomy is preferable early after admission. There were three RCTs and two meta-analyses concerning the surgical procedure, which concluded that laparoscopic cholecystectomy is preferable to open procedures. Literature concerning the surgical treatment according to the grade of severity could not be quoted, because there have been no publications on this topic. Therefore, the treatment was determined based on the general opinions of professionals.

CONCLUSION

Surgical management of acute cholecystitis in the updated TG13 is fundamentally the same as in the Tokyo Guidelines 2007 (TG07), and the concept of a critical view of safety and the existence of extreme vasculobiliary injury are added in the text to call the surgeon's attention to the need to reduce the incidence of bile duct injury. Free full-text articles and a mobile application of TG13 are available via http://www.jshbps.jp/en/guideline/tg13.html.

TG13 guidelines for diagnosis and severity grading of acute cholangitis (with videos)

Since the publication of the Tokyo Guidelines for the management of acute cholangitis and cholecystitis (TG07), diagnostic criteria and severity assessment criteria for acute cholangitis have been presented and extensively used as the primary standard all over the world. However, it has been found that there are crucial limitations in these criteria. The diagnostic criteria of TG07 do not have enough sensitivity and specificity, and its severity assessment criteria are unsuitable for clinical use. A working team for the revision of TG07 was organized in June, 2010, and these criteria have been updated through clinical implementation and its assessment by means of multi-center analysis. The diagnostic criteria of acute cholangitis have been revised as criteria to establish the diagnosis where cholestasis and inflammation demonstrated by clinical signs or blood test in addition to biliary manifestations demonstrated by imaging are present. The diagnostic criteria of the updated Tokyo Guidelines (TG13) have high sensitivity (87.6 %) and high specificity (77.7 %). TG13 has better diagnostic capacity than TG07. Severity assessment is classified as follows: Grade III: associated with organ failure; Grade II: early biliary drainage should be conducted; Grade1: others. As for the severity assessment criteria of TG07, separating Grade II and Grade I at the time of diagnosis was impossible, so they were unsuitable for clinical practice. Therefore, the severity assessment criteria of TG13 have been revised so as not to lose the timing of biliary drainage or treatment for etiology. Based on evidence, five predictive factors for poor prognosis in acute cholangitis--hyperbilirubinemia, high fever, leukocytosis, elderly patient and hypoalbuminemia--have been extracted. Grade II can be diagnosed if two of these five factors are present. Free full-text articles and a mobile application of TG13 are available via http://www.jshbps.jp/en/guideline/tg13.html.

Do metastatic colorectal cancer patients who present with late relapse after curative surgery have a better survival?

Background:

Patients who relapse after potentially curative surgery for colorectal cancer tend to relapse within 5 years. There is, however, a group of patients who relapse beyond 5 years after resection and this late relapsing group may have a different behaviour and prognosis.

Methods:

We analysed data from a prospective population-based registry to compare the characteristics and survival of relapsed patients with metachronous mCRC. Patients were categorised into relapse at <2, 2–5 and >5 years following their initial surgery. Univariate log-rank tests and multivariate Cox regression was performed to determine whether time to relapse (TTR) and other factors were associated with overall survival (OS).

Results:

A total of 750 metachronous mCRC patients were identified. In all, 56% relapsed ⩽2 years, 32.4% at 2–5 years and 11.6% >5 years. Median survival time from the time of diagnosis of mCRC for the three groups was 17.6, 26.1 and 27.5 months, respectively. Short TTR (<2 years) was significantly associated with survival (HR=0.75, 95% confidence interval (CI)=0.60–0.93 and HR=0.73, 95% CI=0.53–1.01, respectively, for 2–5 and >5 years vs <2 years, P<0.05). However, there was no significant difference in survival between patients who relapsed at 5 years or later compared with those who relapsed between 2 and 5 years (HR=0.98, 95% CI=0.69–1.38, P=0.90).

Conclusion:

TTR within 2 years is an independent predictor of shorter survival time for mCRC patients who experience a relapse. These data do not support the hypothesis that patients who have late relapse late (>5 years) have a ‘better' biology or survival compared with patients with a TTR of 2–5 years.

Outcomes of rural patients with metastatic colorectal cancer treated in a centralized system compared with their metropolitan counterparts

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Background: Significant geographical variation in survival after diagnosis of colorectal cancer (CRC) has been reported in Australia. Patients residing in rural locations have inferior survival time compared to metropolitan patients. Factors which have an impact on survival include local access to services (investigations, surgery and chemotherapy). Rural patients tend to present with more advanced disease. We analysed data from South Australia (SA) where cancer care has tended to be centralised to determine if rural patients in this setting have inferior outcomes to metropolitan patients. We examined survival of patients with stage 4 CRC. Methods: An analysis of the SA mCRC registry was performed to compare the oncological and surgical management and survival of city (metropolitan postcode) v rural (rest of state) patients. Overall Survival (OS) was calculated using the Kaplan-meier method. Results: Data from 2289 patient with mCRC since February 2006 were analysed. 27% of patients were rural. Patient characteristics did not differ between the 2 groups. There was no difference in chemotherapy use; City v rural, 1st, 2nd and 3rd line respectively-56%v58%, 23%v23%, 10%v9%. Choice of chemotherapy did not differ between city and rural; FU/Oxaliplatin 61%v60%, irinotecan+/-FU 9%v6%, FU alone 28%v31%. When an oxaliplatin doublet was chosen, oral capecitabine was used more frequently 32% in rural v 13% in city (P<0.001) Addition of bevacizumab/anti-EGFR to first line chemotherapy was equivalent: 19.7% v 14.3%/1.6% v 1.4%. Hepatic resection was also similar in 2 groups 14%v12%. Median OS did not differ; 23.4 months city v 23.5 months rural. These outcomes were similar for men and women. Conclusions: The patient characteristics, choice of chemotherapy (drug and single v doublet), hepatic resection rates and importantly, overall survival did not differ between city v rural patients. Oral chemotherapy used was higher in rural patients without affecting outcome.

New diagnostic criteria and severity assessment of acute cholecystitis in revised Tokyo Guidelines

Background

The Tokyo Guidelines for the management of acute cholangitis and cholecystitis (TG07) were published in 2007 as the world’s first guidelines for acute cholangitis and cholecystitis. The diagnostic criteria and severity assessment of acute cholecystitis have since been widely used all over the world. A validation study of TG07 has shown that the diagnostic criteria for acute cholecystitis are highly reliable but that the definition of definite diagnosis is ambiguous. In addition, considerable new evidence referring to acute cholecystitis as well as evaluations of TG07 have been published. Consequently, we organized the Tokyo Guidelines Revision Committee to evaluate TG07, recognize new evidence, and conduct a multi-center analysis to revise the guidelines (TG13).

Methods and materials

We retrospectively analyzed 451 patients with acute cholecystitis from multiple tertiary care centers in Japan. All 451 patients were first evaluated using the criteria in TG07. The “gold standard” for acute cholecystitis in this study was a diagnosis by pathology. The validity of TG07 diagnostic criteria was investigated by comparing clinical with pathological diagnosis.

Results

Of 451 patients evaluated, a total of 227 patients were given a diagnosis of acute cholecystitis by pathological examination (prevalence 50.3 %). TG07 criteria provided a definite diagnosis of acute cholecystitis in 224 patients. The sensitivity of TG07 diagnostic criteria for acute cholecystitis was 92.1 %, and the specificity was 93.3 %. Based on the preliminary results, new diagnostic criteria for acute cholecystitis were proposed. Using the new criteria, the sensitivity of definite diagnosis was 91.2 %, and the specificity was 96.9 %. The accuracy rate was improved from 92.7 to 94.0 %. In regard to severity grading among 227 patients, 111 patients were classified as Mild (Grade I), 104 as Moderate (Grade II), and 12 as Severe (Grade III).

Conclusion

The proposed new diagnostic criteria achieved better performance than the diagnostic criteria in TG07. Therefore, the proposed criteria have been adopted as new diagnostic criteria for acute cholecystitis and are referred to as the 2013 Tokyo Guidelines (TG13). Regarding severity assessment, no new evidence was found to suggest that the criteria in TG07 needed major adjustment. As a result, TG07 severity assessment criteria have been adopted in TG13 with minor changes.

Survival differences in patients with metastatic colorectal cancer and with single site metastatic disease at initial presentation: results from South Australian clinical registry for advanced colorectal cancer

BACKGROUND

Colorectal cancer is the third most common cancer in Australia. The median overall survival for metastatic colorectal cancer is nearly 2 years. However, there may be survival differences based on site of metastatic disease.

METHODS

Data was collected from the South Australian Registry for Advanced Colorectal Cancer. A total of 1207 patients with single site metastatic disease at initial diagnosis were subclassified into 6 subgroups: liver only (n = 780), pelvic only (n = 148), lung only (n = 142), lymph node only (n = 95), bone only (n = 32), and brain only (n = 10). Univariate and multivariate parametric survival analyses were performed.

RESULTS

Median overall survival was 20.3 months for the whole group. The overall survival for lung-only metastases group was 41.1 months followed by liver- and pelvic-only disease groups (22.8 and 23.8 months, respectively). Patients with isolated bone-only and brain-only metastases had poor overall survival (5.1 and 5.7 months, respectively). On multivariate analysis, prognosis was superior for the lung-only group.

CONCLUSIONS

Lung only group had the longest median overall survival. Bone and brain sites had a poor outlook. Site of metastatic disease at initial presentation may be prognostic.

Post-hepatectomy haemorrhage: a definition and grading by the International Study Group of Liver Surgery (ISGLS)

BACKGROUND

A standardized definition of post-hepatectomy haemorrhage (PHH) has not yet been established.

METHODS

An international study group of hepatobiliary surgeons from high-volume centres was convened and a definition of PHH was developed together with a grading of severity considering the impact on patients' clinical management.

RESULTS

The definition of PHH varies strongly within the hepatic surgery literature. PHH is defined as a drop in haemoglobin level > 3 g/dl post-operatively compared with the post-operative baseline level and/or any post-operative transfusion of packed red blood cells (PRBC) for a falling haemoglobin and/or the need for radiological intervention (such as embolization) and/or re-laparotomy to stop bleeding. Evidence of intra-abdominal bleeding should be obtained by imaging or blood loss via the abdominal drains if present. Transfusion of up to two units of PRBC is considered as being Grade A PHH. Grade B PHH requires transfusion of more than two units of PRBC, whereas the need for invasive re-intervention such as embolization and/ or re-laparotomy defines Grade C PHH.

CONCLUSION

The proposed definition and grading of severity of PHH enables valid comparisons of results from different studies. It is easily applicable in clinical routine and should be applied in future trials to standardize reporting of complications.