View clinical trials related to Colorectal Cancer.
Filter by:The purpose of this study is to compare the additional diagnostic yield obtained by using the acetic acid as vital substance to improve the detection of serrated lesions at colonoscopy. Patients who are scheduled for screening, surveillance or diagnostic colonoscopy will be recruited to the study and randomized to one of two groups. Each enrolled subject will undergo two "back-to-back" procedures limited to the examination of the right colon. Subjects in Group A (study group) will undergo a standard colonoscopy. Once the right colon has been fully examined, acetic acid 2% will be sprayed and the right colon re-examined from cecum to hepatic flexure with within a frame-time of two minutes. Subjects in Group B (control group) will undergo a second examination of the right colon without acid acetic and within the same frame-time. Results from the two groups will be analyzed and compared, with primary outcome measures being detection rates for serrated lesions. Secondary outcome measures will include adenoma detection rate in the right colon or other locations, characteristics of polyps detected, including size and histological results. Subjects will be followed through a 24-72 hour telephone interview for analysis of unexpected adverse events. Clinical results will be analyzed using various statistical measures of significance.
Bevacizumab, a humanized monoclonal antibody against vascular endothelial growth factor (VEGF), combined with fluoropyrimidine-based chemotherapy is now the standard first and second-line treatment for metastatic colorectal cancer. The efficacy of bevacizumab with cytotoxic agents in the third-line treatment of patients with mCRC is still unknown.
Participation in a primary screening colonoscopy programs remains low. Advanced notification letter has been shown to increase participation in colorectal cancer screening with fecal occult blood testing and to be cost effective compared to standard invitation. It is unknown whether advanced notification letter increases participation rate in primary colonoscopy screening program. We hypothesize that an Advance Notification Letter will have significant influence on participation in screening colonoscopy, comparing to standard invitation procedure and will thus result in higher efficiency of the program. This randomized controlled study aims to compare the participation rate in screening colonoscopy in response to advanced notification plus standard invitation letter and standard invitation letter alone. Material and methods: 6800 individuals aged 55-64 years will be drawn from the Population Registry and randomly assigned in a 1:1 ratio to the group invited for screening colonoscopy with advanced notification letter (send two weeks before standard invitation) plus standard invitation (send six weeks before planned screening colonoscopy) or to standard invitation only (send six weeks before planned screening colonoscopy). The sample size was calculated to detect 3% difference in participation rate between the groups (25% vs 28%) with 80% power.
In a preliminary study in healthy subjects, the investigators determined the pharmacokinetic and pharmacodynamic of enteric-coated acetylsalicylic acid (ASA) (Adiro 100 mg, Bayer), and the variability (coefficient of variation), accuracy and precision of a novel biomarker of ASA action, i.e., quantification of the extent of COX-1 acetylation at serine-529, using a stable isotope dilution liquid chromatography multiple reaction monitoring/mass spectrometry (LC-MS) technique. Now, the investigators will perform a clinical study in individuals undergoing Colorectal cancer (CRC) to validate the hypothesis that that low-dose ASA given once daily is acting primarily by selectively acetylating platelet COX-1 and suppressing its activity throughout the 24-hour dosing interval. In contrast, it is expected that the inhibitory effect on extra-platelet sources of COX-1 will be short-lasting, if any, affecting only partially COX-1, and this effect will be completely reversed at 24 hours after dosing. This is an important point which will strengthen the platelet hypothesis underpinning the apparent adequacy of a 24-hour dosing interval of ASA administration for the anticancer effect detected in cardiovascular trials. These patients will be stratified into individuals with adenomas/carcinomas (20 to 30%) and patients without clinically detected adenomas/carcinomas (about 70 to 80%).
Colorectal cancer (CRC) is the third most common cancer and the fourth leading cause of cancer-related death in the world. Despite potentially curative surgery and the use of modern adjuvant chemotherapy, up to 40% of CRC patients subsequently develop local tumor relapse or metastatic disease. Currently, aside from post-operative pathological staging, early follow up of the patients does not include a specific test or any other evaluation that could predict disease recurrence. Therefore, exploring and identifying novel biomarkers of CRC's following diagnosis of the primary tumor may help us in identifying patients at high risk for recurrence. Modifications in signaling pathways and their regulation by microRNAs (miRNAs) are being evaluated as biomarkers and therapeutic targets for cancer in general and CRC in particular. It has been established, although not completely, that miRNAs have a role in initiation and progression of CRC. Modifications of miRNAs have been recorded in CRC tumors, and the expression patterns of these miRNAs could in principle biomark this cancer's phenotype. As miRNAs are well documented to regulate critical molecules in signaling pathways, their regulation of tumor relevant pathways may also serve to further sub-classify patients into drug responsive groups. Moreover, miRNAs may be sampled from peripheral blood and are available as a non-invasive diagnostic method, their application as biomarkers is of special interest. In this study the investigators aim to quantify miRNA levels in human colon and rectal tumors, tumor adjacent and normal tissues. By comparing this data from a large cohort of patients, the investigators aim to identify specific, relevant miRNAs that may serve as biomarkers to stratify CRC patients according to their clinical characteristics such as disease stage, specific treatment, prognosis and disease recurrence.
The aim of this systematic review is to compare intracorporeal (IA) versus extracorporeal anastomosis (EA) after laparoscopic right hemicolectomy for cancer.
Colorectal cancers account for 783,000 new cases and cause 437,000 deaths per year across the world. Diagnosis in the early stages improves survival rates. Up to now, these cancers are mostly diagnosed only at later stages of the disease's course through histoimmune staining and molecular biology processes on the tissues biopsied from the gastrointestinal system under invasive diagnostic procedures of colonoscopy. Oral fluid presents a large protein complexity and has been recently used as a diagnostic biofluid for oral, as well as systematic diseases. Using oral fluid as a bio-marker for the colorectal cancer can be advantageous as it contains gastrointestinal fluids, in addition to bacteria and bacteria lysate, which can also serve as a bio-markers' source for colorectal cancers. Proteomic technologies provide the tools needed to discover and identify disease-associated biomarkers. The aim of the present study is to identify salivary bio-markers in patients suffering from colorectal cancers.
the aim of this study is to observe the effect of irinotecan-based regimen in patients with advanced colorectal cancer.
The investigators hypothesize that Ca2+/MG2+ infusions will not have a significant effect on oxaliplatin pharmacokinetics.
This is a single arm, open-label phase II study to evaluate the efficacy and safety of Capecitabine plus oxaliplatin (XELOX) in the peri-operative treatment of patients with potentially resectable liver metastasis from colorectal cancer.