Active clinical trials for "Rectal Neoplasms"

Background: An exact lymph node staging is essential in the treatment of rectal cancer. Objective: The aim of this study was to assess the effect of indigo carmine injection on the number of retrieved and positive lymph nodes after transanal total mesorectal excision (taTME). Design: This is a retrospective, non-randomised study. Settings: This study was conducted at a tertiary hospital by a multidisciplinary team. Patients: Between 2013 and 2019, patients undergoing transanal total mesorectal excision were analysed. Patients with indigo carmine injection (intervention group) were compared to those without (control group). Interventions: Transanal total mesorectal excision was performed with or without ex vivo intra-arterial indigo carmine injection. Main Outcome Measures: The number of retrieved and positive lymph nodes was the primary outcome measure.

Robotic rectal cancer resection with natural orifice extraction is a recently developed minimally invasive surgery for patients with rectal cancer. However, it's safety and feasibility remain undiscussed and controversial. This study reported the clinical outcomes and prognostic factors of robotic assisted rectal cancer resection alone vs. robotic rectal cancer resection with natural orifice extraction to discuss aforementioned question.

The combination of neoadjuvant chemoradiotherapy (CRT) and total mesorectal excision (TME) is considered the standard treatment for locally advanced rectal cancer in the western world. Appropriate preoperative treatment and margin free surgery are key-elements in reducing the local-recurrence of the tumor and consequently improving overall survival. Nevertheless, the local recurrence of stage II and III rectal cancer is still high, with current levels of 5% to 10% even when R0 resection is achieved. Most of the cases of loco-regional recurrence are associated with lateral lymph nodes (LLN) spread of cancer cells, which is not always controlled by the preoperative chemotherapy. As a matter of fact, the incidence of LLD metastases has been estimated to range from 11% to 22% in patients with T3/4 rectal cancer below the peritoneal reflection. In order to improve these poor outcomes, Japanese surgeons have adopted extended lymphadenectomy with the dissection of lateral extramesorectal lymph nodes as the standard of care for T2-3 low rectal cancer patients5. While this approach is widely used in Japan and Korea, western surgeons have preferred a less aggressive approach, indicating lateral lymph node dissection (LLND) only in presence of clinically highly suspicious lateral pelvic lymph nodes on baseline magnetic resonance imaging (MRI). Thus, it is essential to identify preoperative predictive factors of LLN metastasis. Even if MRI is considered the optimal diagnostic tool in rectal cancer, its accuracy for LLN staging is considered poor, especially after neoadjuvant treatment. LLNs often change in both features and size after CRT, and this behaviour might not be in concordance with the response of the primary tumor. To the best of our knowledge, no consensus exists on whether the risk of local recurrence should be determined by assessing the features of LLN on the primary MRI or on the restaging MRI. Moreover, the relation between LLN response and primary tumor regression grade after neoadjuvant CRT needs to be thoroughly explored. This multicenter cohort study aimed to investigate factors on primary and restaging MRI associated with lateral nodal recurrence and to identify patients who may benefit from LLND after neoadjuvant treatment for locally advanced rectal cancer.

Early rectal cancer can be removed by minimally-invasive surgery, and the standard pathological assessment of the removed tumour gives valuable information about how advanced the tumour is. This gives an indication of how likely the cancer is to recur, so doctors and patient can decide on the most appropriate further treatment and follow-up. However there is still much uncertainty in these predictions about recurrence. This study will assess two further pathology tests, ploidy and stroma ratio in the tumour, by correlating the results with outcome. This will determine whether these two tests provide additional value in predicting outcome. If so, clinicians would be better able to advise patients with early rectal cancer about their prognosis and further management.

The purpose of this study is to evaluate the value of dynamic change in detecting CTCs in peripheral blood from stage III rectal cancer patients undergoing neoadjuvant Folfox treatment and chemoradiotherapy,before and after surgery.

Endpoints subproject 1: To develop a reproducible method for the detection of lymph nodes by DECT in operation specimens from rectal resection for cancer. sub project 2: Primary endpoint: To evaluate the sensitivity and specificity for malignant lymph nodes in vitro RC specimens compared with histopathology. Secondary endpoint: To assess DECT as imaging tool for the diagnosis of malignant lymph nodes at RC. Histopathology will be used as reference.Subproject 3: Primary endpoint: To compare the sensitivity, specificity, positive- and negative predictive values, accuracy of DECT and standard MRI. Secondary: To evaluate the value of the gold standard for the use of imaging methods for the description of the lymph node, validated by histopathology. Secondary: to determine the value of tumor diagnostics using DECT.subproject 4: To assess the value of DECT as imaging tool for diagnosing response to chemo radiotherapy of malignant lymph nodes.

In patients who underwent sphincter preserving surgery with toal mesorectal excision and diverting stoma after neoadjuvant chemoradiation therapy for rectal cancer, the inestigators would evaluate the effect of a biofeedback therpy before stoma closure on their anorectal function after stoma closure.

This study tests biopsy and tissue from patients who have been treated for primary rectal cancer at the Royal Marsden Hospital between 2011 and 2013, who have an mrTRG score at post-chemoradiotherapy MRI. It is a retrospective pilot study to determine the apoptotic and proliferative index count pre and post chemoradiotherapy.

Bowel cancer is the third most common cancer in the UK in both males and females. The rectum is the most commonly affected part of the bowel. Improvements in surgery have meant that many patients with rectal cancer can now undergo surgery that removes the rectum and avoids a permanent stoma. The operation that most patients have is an anterior resection of the rectum. Unfortunately this surgery frequently leads to a change in bowel function, with patients suffering from incontinence, urgency and unpredictability a problem known as anterior resection syndrome. These problems are believed to be fairly common following surgery but follow up appointments have traditionally concentrated on ensuring that the cancer has not returned and have not reviewed functional outcomes in enough detail. Because of this we are unsure exactly how common the problems described are. The proposed study will allow us to determine how many patients have ongoing symptoms following their surgery for rectal cancer. It will also allow us to use a newly developed scoring system the Low Anterior Resection Syndrome (LARS) score for the first time in a UK population, to ensure that it can accurately be used in the future to measure the problem and aid development of new therapies. An appreciation of the impact of symptoms on postoperative quality of life will encourage routine assessment of functional outcomes in clinical practice, allowing identification of patients who may benefit from treatment.

Preoperative radiotherapy and pelvic surgery is recommended to many patients with rectal cancer. For men there are theoretical reasons to believe that the treatment may effect hormone levels, spermatogenesis, sexual function and wellbeing. To address these questions a longitudinal observational study was initiated where measurements of androgen hormone levels, semen samples and sexual function were assessed before treatment (baseline) and during a follow-up period of two years.