Active clinical trials for "Colorectal Neoplasms"

Registry Multicenter, prospective observational study Observe adverse events and efficacy in recruited patients for 3 years under real world settings.

Some data have suggested a clinical survival benefit related to the reintroduction of anti-EGFRs therapy in patients with metastatic colorectal cancer (mCRC). Based on resistance mechanisms related to the development of resistant clones, the investigators could assume that patients who benefited most from the reintroduction of anti-EGFRs were those who, through interval chemotherapy, had no longer mutated RAS clone in plasma that appeared during the progression with the first anti-EGFR treatment. Conversely, those who did not benefit from this therapy were probably patients who had mutated RAS clones circulating at the time of reintroduction of anti-EGFRs. To support this hypothesis, investigators propose to evaluate the correlation between the eventual presence of RAS mutations in circulating blood and the efficacy of an anti-EGFR therapy reintroduction in patients with mCRC.

At present, chemotherapy is widely used in the adjuvant treatment of colorectal cancer patients after surgery. Capecitabine is one of the main chemotherapeutic drugs. But the effect is not good enough, the adverse reaction is serious, and the individual differences were significant. The present study shows that these problems are related to the differences in the exposure of capecitabine and its metabolites in different patients. The genetic biomarkers for capecitabine include DRD, MTHFR and TYMS. Mutations in these genes directly affect the expression of metabolic enzymes involved in capecitabine and control the concentration of capecitabine and its metabolites. However, these markers have been obtained through clinical trials in the United States, and their role in predicting the effectiveness or safety of capecitabine and its metabolites has not been validated in Chinese cancer patients.The study was based on a case study of patients with colorectal cancer in China, and capecitabine as the primary postoperative chemotherapy regimen to verify whether the available biomarkers can be used to predict the effectiveness and safety of capecitabine. To clarify the effect of capecitabine on endogenous metabolites, and to study the mechanism of its effect, so as to discover new biomarkers.

Cancer patients undergo many different modalities of treatments. Pharmacological treatment should be well understood. The nutritional status is not taken into account when calculating drug's doses and this may have an impact in toxicity and quality of life. The present study proposes to evaluate the relationship between the calculation of pharmacological treatment's doses, the toxicity and the impact on quality of life among colorectal and breast cancer's patients.

Retrospective multicentre study. All patients with a diagnosis of Crohn's disease (CD) and operated for colorectal cancer (CRC) between 01/01/2010 and 01/01/2020 will be included in the dataset. Data will include preoperative, intraoperative and postoperative variables, with long term follow up when feasible. The study will focus on a comparison between patients treated with total proctocolectomy (TPC) and patients treated with subtotal colectomy (STC) or segmental resection (SR). Primary endpoints will be oncologic outcomes, postoperative morbidity and mortality. Secondary endpoints include quality of life (QoL).

This is an observational, ambispective cohort study. The aim is to compare the efficacy and safety of regorafenib versus fruquintinib conducted in China. About 268 eligible metastatic colorectal cancer patients after second-line therapy will be assigned to receive either regorafenib or fruquintinib, based on decision of the gastrointestinal physician according the patients' condition.

A multicentre randomized health services study within the population-based primary colonoscopy screening program (PCSP) in Poland. Individuals, aged 55-60 years, willl be randomized in a 1:1:1 ratio to arms: (1) Invitation by post, (2) Call Center or (2) Combined invitation methods. The primary outcome measure is rate of participation in screening colonoscopy. The sample size of 6 300 participants will detect 3 to 5 percentage point differences (depending on the arms comparison) in participation rate between groups with 80% power and significance level 0.05, using Ochran-Mantel-Haenszel test.

This is an observational, prospective study using fecal DNA methylation test to define the risk of suffering from advanced adenoma or colorectal cancer (CRC) compared to colonoscopy and fecal immunochemical test (FIT). This study recruits at least 80 participants, including 40 people of healthy controls, 20 people with adenoma, and 20 people with CRC, which were confirmed by colonoscopy. All fecal specimens from participants will be examined by FIT and multi-methylated target gene detection through real-time quantitative methylation-specific PCR (qMSP). The objective of this study is to evaluate the sensitivity and specificity of multi-methylated target PCR compared with the FIT and confirm the examination results through colonoscopy.

-1498C/T VEGF polymorphism, as suggested by a recent retrospective analysis, seems to have a role in predicting the efficacy of Bevacizumab plus FOLFIRI in first-line treatment of metastatic colorectal cancer patients. The present study aims to prospectively evaluate the predictive role of this polymorphism in metastatic colorectal patients receiving the same treatment.

This study examines the best way to teach genetics to family medicine residents. First year family medicine residents at the University of Toronto will be taught basic clinical genetics as well as a specific disease in genetics via 3 different educational methods. All participants will undergo an oral examination and written knowledge test 3 months after this education. Results between groups will be compared, and the best way to teach genetics to residents determined.