Loss of psoas muscle during neoadjuvant treatment for rectal cancer is associated with poor oncological and surgical outcomes.

BACKGROUND: Sarcopenia has been associated with poor outcomes in rectal cancer patients. This study aims to assess the degree of muscle loss during neoadjuvant therapy in patients with rectal cancer, and its relationship with tumour response, post-operative complications and long-term disease recurrence. METHODS: The change in the psoas muscle area was determined by measuring the psoas muscle area at L4 on initial staging PET CT scans and comparing this with the restaging scan 8-10 weeks after radiation treatment had been completed. The average change in the psoas muscle area was compared between patients who had residual disease versus complete clinical/pathological response, anastomotic leak vs. no leak, and distant recurrence vs. no recurrence on follow-up imaging. RESULTS: Ninety-two patients were included in the study. The mean loss of psoas muscle area was 5%. Patients who had a complete response to chemoradiotherapy showed a statistically significant difference in muscle mass loss (2.8%) compared to those with residual tumour present after therapy (6.2%), P = 0.02 on multivariable analysis. There was a statistically significant greater loss of muscle in patients who had an anastomotic leak versus those that did not (10.2% vs. 4.1%) and in those who developed metastatic disease versus those that did not (10.7% vs. 4.1%) (P < 0.05). CONCLUSION: Our study adds to the growing body of evidence that sarcopenia is a predictor of poor surgical and oncological outcomes in rectal cancer patients. We postulate that the loss of muscle is an indication of disease burden and worse tumour biology.

The Use of Prophylactic Ureteric Stents in Major Abdomino-Pelvic Sarcoma Surgery: Risks, Benefits, and Potential Complications.

Here we present two cases of post-operative obstructive renal failure following major abdomino-pelvic sarcoma surgery. In both cases, prophylactic ureteric stents were inserted to aid the identification and protection of the ureters during resection of these complex retroperitoneal masses. In case one, obstructive renal failure occurred following ureteric stent removal on day 0 post-operatively. In case two, obstructive renal failure developed on day 1 post-operatively despite having a ureteric stent in situ. Here we propose that a combination of reflex anuria/ureteric edema and papillary sloughing led to the obstructive renal failure in both cases. Re-insertion of bilateral ureteric stents in case one, and replacement of a right ureteric stent in case two saw prompt excretion of urine and sloughy debris with rapid improvement of renal function. This article presents these cases in detail and further reviews the use of prophylactic ureteric stents in major abdomino-pelvic surgery along with the current guidelines for their usage.

Resection of previously inoperable retroperitoneal liposarcoma.

We present a case of successful resection of a large right upper quadrant retroperitoneal dedifferentiated liposarcoma involving multiple adjacent organs, initially considered inoperable in a patient in his 40s. This case highlights the importance of extensive preoperative planning and a multidisciplinary approach in achieving a greater chance of curative resection. Preoperative optimisation included neoadjuvant chemotherapy, concurrent portal vein embolisation and hepatic vein embolisation. The patient then underwent en-bloc resection, including total pancreatectomy, hemihepatectomy and vena caval resection in conjunction with extracorporeal membrane oxygenation and percutaneous venovenous bypass.

A surgically optimized intraoperative poly(I:C)-releasing hydrogel prevents cancer recurrence.

Recurrences frequently occur following surgical removal of primary tumors. In many cancers, adjuvant therapies have limited efficacy. Surgery provides access to the tumor microenvironment, creating an opportunity for local therapy, in particular immunotherapy, which can induce local and systemic anti-cancer effects. Here, we develop a surgically optimized biodegradable hyaluronic acid-based hydrogel for sustained intraoperative delivery of Toll-like receptor 3 agonist poly(I:C) and demonstrate that it significantly reduces tumor recurrence after surgery in multiple mouse models. Mechanistically, poly(I:C) induces a transient interferon alpha (IFNα) response, reshaping the tumor/wound microenvironment by attracting inflammatory monocytes and depleting regulatory T cells. We demonstrate that a pre-existing IFN signature predicts response to the poly(I:C) hydrogel, which sensitizes tumors to immune checkpoint therapy. The safety, immunogenicity, and surgical feasibility are confirmed in a veterinary trial in canine soft tissue tumors. The surgically optimized poly(I:C)-loaded hydrogel provides a safe and effective approach to prevent cancer recurrence.

The Use of Extracorporeal Circulation to Facilitate the Resection of a Large Retroperitoneal Sarcoma With Major Vessel Involvement: A Single-Center Review of 20 Cases.

OBJECTIVE: To describe the introduction of extracorporeal corporeal oxygenation (ECMO) to facilitate the surgical resection of large retroperitoneal sarcomas involving major vessels and to report preliminary outcomes. DESIGN: A case series. SETTING: At a tertiary university hospital and state sarcoma center. PARTICIPANTS: Patients undergoing retroperitoneal sarcoma resection requiring inferior vena cava (IVC) reconstruction between June 2018 and March 2022. INTERVENTION: ECMO for retroperitoneal tumor resection requiring IVC reconstruction. MEASUREMENTS AND MAIN RESULTS: A total of 20 patients underwent ECMO-assisted retroperitoneal sarcoma resection and IVC reconstruction. The median age was 60.5 years (IQR 48-69); 15 women and 5 men. The median procedure and ECMO durations were 10.8 hours (IQR 8.5-12.4 hours) and 2.2 hours (IQR 62-218 minutes), respectively. The median intensive care unit and hospital lengths of stay were 4 days (IQR 3-5 days) and 21 days (IQR 14-31 days), respectively. All 20 patients received packed cell transfusions (median 8 per patient [IQR 4-14]); 11 patients required fresh frozen plasma, 6 required platelets, and 11 required fibrinogen supplementation. One patient required recombinant activated factor VII. Sixteen patients experienced acute kidney injury, with 12 patients progressing to chronic kidney disease. Three patients were required to return to the operating room within 7 days, with no returns within the first 24 hours. There was no in-hospital or 30-day mortality. Survival at 3 years was 84%. CONCLUSIONS: ECMO for resecting large retroperitoneal tumor resection was introduced successfully and facilitated satisfactory outcomes for many patients who might otherwise have been considered too high risk.

Cost analysis of a watch-and-wait approach in patients with a complete clinical response to chemoradiotherapy for rectal cancer.

BACKGROUND: There is increasing interest in the watch-and-wait approach for patients with rectal cancer who have had a complete clinical response following neoadjuvant long course chemoradiotherapy. This study is a cost analysis of expenditure on patients in the watch-and-wait program versus patients who underwent standard rectal resection followed by routine surveillance. METHODS: Data were prospectively collated and retrospectively analysed in all patients who presented with rectal cancer from January 2016 to January 2018 at Sir Charles Gairdner Hospital, Perth, Western Australia. Software developed by the North Metropolitan Health Service was used to capture comprehensive data to calculate the in-hospital expenditure for an individual patient throughout their treatment journey. RESULTS: For a patient enrolled in the watch-and-wait pathway, the total cost of surveillance over a 5-year period was $45 246. This was compared with the cost of an ultra-low anterior resection/loop ileostomy/closure of loop and routine postoperative surveillance which came to a total of $87 473. While a patient who had an abdominoperineal resection followed by routine 5-year surveillance had an expenditure of $82 290. CONCLUSION: There is growing evidence that the watch-and-wait strategy is a valid management option. In the cost-conscious environment of the current health care system, the watch-and-wait pathway is a cost-effective and economically advantage treatment.

Functional outcomes and local control are acceptable following hand-sewn colo-anal anastomoses for rectal cancer: Results of long-term follow-up.

BACKGROUND: Rectal cancer that grows so close to the anal canal that an adequate distal margin cannot be achieved with a double-stapled anastomosis (DSA) has been managed with abdominoperineal resection. Inter-sphincteric dissection and hand-sewn colo-anal anastomoses (HSCAA) allows anastomosis in some cases where DSA is impossible. There are concerns that HSCAA may lead to complications, local recurrence and poor continence. Our aim was to assess our experience with HSCAA in terms of recurrence, complications, continence and quality of life. METHODS: Consecutive patients at two metropolitan hospitals who underwent an ultra-low anterior resection with hand-sewn colo-anal anastomoses for low rectal cancer during a 10-year period were asked to complete a questionnaire which allowed continence and quality-of-life scores to be calculated. Recurrence and complication rates were obtained from a retrospective medical record review. RESULTS: A total of 26 patients underwent HSCAA. Six patients were not sent a questionnaire (3 deaths, 1 with ileostomy, 1 with ileostomy reversal within 3 months and one who had transferred care to another hospital). Fifteen patients returned questionnaires. Local recurrence occurred in zero cases. Two developed systemic recurrence. Four patients developed anastomotic stricture and three had anastomotic leak. Median Faecal Incontinence Severity Index score was 28 and median FIQoL scores were 3.00, 2.78, 3.86 and 3.00. One patient wished that they had had a permanent stoma rather than anastomosis. CONCLUSION: HSCAA delivered good local control of rectal cancer and high avoidance of permanent stoma. Faecal continence is impaired; however, the results are acceptable to the majority of patients.

Endoscopic clips allow for accurate pre-operative localisation of colorectal cancer.

BACKGROUND: Colorectal cancer is a major cause of morbidity and mortality worldwide. Optimal management of this disease relies upon accurate pre-operative localisation to allow multidisciplinary discussion and treatment planning. Current pre-operative localisation methods consist of colonoscopy and computed tomography (CT), which are only 79%-85% accurate. To minimise this error, colonoscopy tattooing is a routine practice to facilitate operative localisation. The aim of this study is to investigate if endoscopic radiopaque clips can more accurately localise the lesions pre-operatively. METHODS: A retrospective case-control study was conducted of patients diagnosed with colorectal cancer at a tertiary hospital between 2017 and 2019. Visualisation rates and accurate localisation rates were compared between patients receiving radiopaque clips and those who had colonoscopy alone. All patients received a tattoo distal to the tumour and a staging CT. Data on patient demographics, tumour demographics, post-procedure complications and changes to surgical management were collected. RESULTS: Of 285 patients, 245 had tumour localisation with colonoscopy alone and 40 had additional clip localisation. Groups had comparable patient demographics. For patients receiving clips and follow-up CTs within 14 days, 92% of lesions were visualised and 100% of these lesions were accurately localised. In contrast, colonoscopy only accurately localised 77% of lesions (p < 0.01). This resulted in 1.2% of patients requiring an altered operation due to incorrect localisation. No clip-related complications were reported. CONCLUSION: Radiopaque clips are a highly accurate and cost-effective method for localising colorectal cancer with a pre-operative accuracy rate over 92%.

Post-operative outcomes in the elderly following colorectal cancer surgery.

BACKGROUND: Despite the prevalence of colorectal cancer in the elderly, there has been a lack of recent studies examining surgical outcomes in these patients. Post-operative outcomes of colorectal cancer surgeries in those aged 80 and above will be compared to those younger than 80. METHODS: A retrospective study was conducted of adults receiving surgical resections at a single tertiary centre for colorectal cancer diagnosed between January 2017 and December 2019. Patient demographics, mode of presentation, tumour demographics, operative data and post-operative outcomes were investigated. RESULTS: Of the 326 patients included, 56 were aged 80 and above. Older patients were more likely to be female (P = 0.02), present with surgical emergencies or from other workup rather than through screening (P = 0.002), have more locally advanced cancers (P = 0.009) and receive less neoadjuvant therapy (P = 0.016). Despite this, they had comparable outcomes to those younger than 80 in terms of length of stay (P = 0.21) and rates of complications including mortality (P = 0.67). CONCLUSION: With appropriate patient selection and management, elderly patients can achieve comparable post-operative outcomes to their younger counterparts.

Revising the definition of vertical margin involvement following endoscopic polypectomy may reduce unnecessary surgery in patients with malignant colorectal polyps.

BACKGROUND AND STUDY AIMS: Endoscopically resected malignant colorectal polyps (MCPs) present a dilemma regarding whether the risk of residual disease justifies a major bowel resection. Overtreatment is common, and the vast majority of patients who undergo resection have no residual tumor. The aim of this study was to investigate whether revising the definition of vertical margin involvement following MCP polypectomy could reduce unnecessary surgery. PATIENTS AND METHODS: This was a cohort study of consecutive patients with MCPs treated at a tertiary hospital between 2004 and 2018. Data on demographics, index colonoscopy, polyp pathology, and any subsequent surgical resection were analyzed. Polypectomy resection margins were reviewed and measured to the nearest decimal place. The ability of existing guidelines (requiring a margin clearance of ≥ 1 mm) to predict residual disease was compared to a revised version requiring a margin clearance of ≥ 0.1 mm. RESULTS: A total of 129 patients with an MCP were included. Of these 129 patients, 77 (60%) underwent surgical resection, of which 62 (81%) had no residual tumor. Existing guidelines, requiring a margin clearance of ≥ 1 mm, classified 28 patients as being at "low risk" for residual disease. Of these, four underwent surgery, but none had residual tumor (P = 0.031). Revised guidelines, requiring a margin clearance of ≥ 0.1 mm, classified 44 patients as "low risk." Of these, in the 13 that had surgery, no residual tumor was found (P = 0.003). CONCLUSIONS: Revising the definition of vertical margin involvement leads to more patients being correctly classified as being at low risk of residual disease. This has the potential to reduce unnecessary surgery in patients with MCPs.

Do Patients Treated for Colorectal Cancer Benefit from General Practitioner Support? A Video Vignette Study.

BACKGROUND: Patients who have been treated for colorectal cancer in Australia can consult their general practitioner (GP) for advice about symptoms or side effects at any time following their treatment. However, there is no evidence that such patients are consistently advised by GPs, and patients experience substantial unmet need for reassurance and advice. OBJECTIVE: To explore the patient management options selected by GPs to treat a set of patients describing their symptoms following treatment for colorectal cancer. METHODS: This was an Internet-based survey. Participants (GPs) viewed 6 video vignettes of actors representing patients who had been treated for colorectal cancer. The actor-patients presented problems that resulted from their treatment. Participants indicated their diagnosis and stated if they would prescribe, refer, or order tests, based on that diagnosis. These responses were then rated against the management decisions for those vignettes as recommended by a team of colorectal cancer experts. RESULTS: In total, 52 GPs consented to take part in the study, and 40 (77%) completed the study. Most GPs made a diagnosis of colorectal cancer treatment side effects/symptoms of recurrence that was consistent with the experts' opinions. However, correct diagnosis was dependent on the type of case viewed. Compared with radiation proctitis, GPs were more likely to recognize peripheral neuropathy (odds ratio, OR, 4.43, 95% CI 1.41-13.96, P=.011) and erectile dysfunction (OR 9.70, 95% CI 2.48-38.03, P=.001), but less likely to identify chemotherapy-induced fatigue (OR 0.19, 95% CI 0.08-0.44). GPs who had more hours of direct patient care (OR 0.38, 95% CI 0.17-0.84, P=.02), were experienced (OR 9.78, 95% CI 1.18-8.84, P=.02), and consulted more patients per week (OR 2.48, 95% CI 1.16-5.30, P=.02) suggested a management plan that was consistent with the expert opinion. CONCLUSIONS: In this pilot study, years of experience and direct patient contact hours had a significant and positive impact on the management of patients. This study also showed promising results indicating that management of the common side effects of colorectal cancer treatment can be delegated to general practice. Such an intervention could support the application of shared models of care. However, a larger study, including the management of side effects in real patients, needs to be conducted before this can be safely recommended.

Predicting general practice attendance for follow-up cancer care.

OBJECTIVE: To examine the role of the theory of planned behavior (TPB) in influencing patients' intention to attend follow-up visits with a general practitioner (GP). METHODS: A questionnaire based on the TPB was used to assess colorectal cancer (CRC) patients' intention to attend follow-up visits with a GP. RESULTS: TPB factors accounted for 43.3% of the variance of intention for follow-up visits. Attitude alone explained 23.3% of the variance. Attitude and presence of other comorbidities significantly affected intention to visit a GP (attitude: R(2)=0.23, F [1, 65]=4.35, p < .01; comorbidity: R(2)=0.13, F [1, 65]=3.02, p < .05). CONCLUSION: Patients who believe their GP has the skills and knowledge to detect a recurrence and patients with other comorbidities have greater intention to visit their GP following treatment.

Men's help-seeking behavior with regards to lower bowel symptoms.

OBJECTIVE: To explore the barriers to help-seeking among men experiencing lower bowel symptoms. METHODS: Semi-structured interviews were conducted with 13 men recruited via purposive sampling. Interviews were audio-taped, transcribed, and analyzed thematically. RESULTS: Misinterpretation of the symptoms and the attribution of the symptoms to non-medical causes were common barriers to help-seeking. Other barriers include the cost of consulting a GP, llow level of confidence in consultation, and fear of cancer diagnosis. Some participants did not seek medical advice as the symptoms were intermittent or resolved with over-the-counter medications. CONCLUSION: There is a need for health promotion campaigns for men with regards to seeking timely medical advice for lower bowel symptoms.

Barriers to help-seeking in men diagnosed with benign colorectal diseases.

OBJECTIVE: To explore the help-seeking pathway for lower bowel symptoms in men diagnosed with benign bowel diseases. METHODS: Semi-structured interviews were conducted. The data were analyzed thematically using Andersen's Model of Patient Delay as the theoretical framework. RESULTS: The major delaying factors were attribution of symptoms to self-limiting conditions, failure to make time to visit a GP, low expectation of help from the GP, fear of cancer diagnosis and embarrassment. CONCLUSION: The major causes of delay in help-seeking were related to the participants, whereas factors associated with treatment delay were less prominent in diagnostic delay.

Colorectal cancer--applying a gender lens.

BACKGROUND: Colorectal cancer (CRC) is a major global health problem with survival varying according to stage at diagnosis. The incidence of CRC is much higher in patients with lower bowel symptoms. The symptoms are non-specific and are commonly experienced in the general population. Biological and environmental factors account for the high incidence and poor prognosis of CRC in men. OBJECTIVE: To review the behavioural factors influencing patient delay in seeking help for lower bowel symptoms using a gender lens. METHODS: An extensive literature search was performed using various databases including Medline, PubMed, CINAHL Plus, EMBASE and PsycINFO (1993-2013). Various search terms including rectal bleeding, prevalence, colorectal cancer, consultation, help-seeking, gender differences and men were used. A systematic methodology including systematic data extraction and narrative synthesis was applied. RESULTS: Thirty-two studies were included in the review. All studies except four were quantitative. Although there is some evidence that men delay more compared with women, there has not been any major improvement in the help-seeking behaviour for such symptoms over the past two decades. Several behavioural and demographic factors were associated with low rates of help-seeking. CONCLUSION: There are limited studies focusing on men's help-seeking behaviour for lower bowel symptoms. To facilitate timely help-seeking in men, it is important to understand their patterns of helpseeking for such symptoms. Further research to understand men's help-seeking behaviour is warranted.

Development of a patient-administered self-assessment tool (SATp) for follow-up of colorectal cancer patients in general practice.

BACKGROUND: Treatment for colorectal cancer (CRC) may result in physical, social, and psychological needs that affect patients' quality of life post-treatment. A comprehensive assessment should be conducted to identify these needs in CRC patients post treatment, however, there is a lack of tools and processes available in general practice. AIMS: This study aimed to develop a patient-completed needs screening tool that identifies potentially unmet physical, psychological, and social needs in CRC and facilitates consultation with a general practitioner (GP) to address these needs. METHODS: The development of the self-assessment tool for patients (SATp) included a review of the literature; face and content validity with reference to an expert panel; psychometric testing including readability, internal consistency, and test-retest reliability; and usability in clinical practice. RESULTS: The SATp contains 25 questions. The tool had internal consistency (Cronbach's alpha 0.70-0.97), readability (reading ease 82.5%), and test-retest reliability (kappa 0.689-1.000). A total of 66 patients piloted the SATp. Participants were on average 69.2 (SD 9.9) years old and had a median follow-up period of 26.7 months. The SATp identified a total of 547 needs (median 7 needs/per patient; IQR [3-12.25]). Needs were categorised into social (175[32%]), psychological (175[32%]), and physical (197[36%]) domains. CONCLUSION: SATp is a reliable self-assessment tool useful for identifying CRC patient needs. Further testing of this tool for validity and usability is underway.