Active clinical trials for "Colorectal Neoplasms"

Observational, non randomized study aimed at measuring the circadian rhythms in the urinary concentrations of physiological modified nucleosides in 30 patients with metastatic colorectal cancer and in 30 age and sex-matched healthy subjects.

The nonpolypoid colorectal neoplasms (NP-CRNs) are relatively common in patients with gastrointestinal alarm systoms. The depressed lesions have a greater risk of having cancer than flat and polypoid lesions.

Matrix metalloproteinases (MMPs) have been shown to be involved in cancer biology. Significant expression of MMP-7 (matrilysin) in colorectal cancer is mainly associated with metastatic disease even though it is expressed in most tumor states. Our purpose is to analyse MMP-7 in bowel and lymph nodes of different tumor stages and to evaluate its expression as a potential biomarker of cancer disease in patients surgically treated for benign and malignant colorectal tumors. Tumoral tissue, lymph nodes and serum samples from recruited Patients plus serum samples from healthy volunteers are analysed for matrilysin expression by histology, immunohistochemistry, ELISA and Western blotting. If Matrilysin increases with increasing dysplasia and cancer disease stage in tumor tissue as well as in the regional lymph nodes it might be used as a complement in investigating suspected locally advanced cancer.

Overall, only limited evidence exists regarding the clinical benefit of antithrombotic prophylaxis after laparoscopic surgery for cancer. Four studies reported on the incidence of venous thromboembolism (VTE) after laparoscopic surgery for cancer. These studies differ concerning study design, site of cancer, regimens for antithrombotic prophylaxis and reported incidence of VTE. The aim of this multicenter, randomized study is to assess the clinical benefit of extended (4 weeks) compared to short (one week) heparin prophylaxis after laparoscopic surgery for colorectal cancer.

The primary objective is to determine the sensitivity and specificity of the Exact Colorectal Cancer (CRC) screening test for colorectal cancer, using colonoscopy as the reference method. Lesions will be confirmed as malignant by histopathologic examination. The secondary objective is to compare the performance of the Exact CRC screening test to a commercially available FIT assay, both with respect to cancer and advanced adenoma. Lesions will be confirmed as malignant or precancerous by colonoscopy and histopathologic examination.

Systemic chemotherapy for metastatic colon cancer is often used in the neoadjuvant setting for patients undergoing liver resection. This treatment is given either to keep the tumor at bay or reduce its size before the time of resection. While many metastatic tumors might appear to respond well and even radiographically disappear following neoadjuvant therapy, it is unclear whether grossly or radiographically negative areas of previous disease are microscopically free of tumor cells. As such, when possible, resection boarders typically follow 1 cm margins from the tumor size prior to neoadjuvant therapy. These margins might be necessary to encompass all histologically present disease or they might be unnecessarily large, serving only to increase the mortality and morbidity of the operation. This study begins to address this question by a histological examination of the pattern of cell death in areas of metastases removed after neoadjuvant therapy. Furthermore, clinical cases in which neoadjuvant therapy allowed for resection of previously unresectable cancer will be examined to determine whether there is an increased rate of recurrence despite "negative" resection boundaries in these cases.

The goal of this behavioral research study is to improve the use of cancer prevention services, increase early detection, and treatment of cancer. A secondary outcome of this demonstration project proposes that a structured patient navigator (PN) will reduce the cost of Medicare services.

The overall goal of this study is to explore colorectal cancer patients' concerns and interest about their health and behavior changes post treatment. Investigators will conduct formative research, which includes qualitative interviews, to assess the issues that cancer survivors are willing to work on as they transition out of active treatment. The specific aims are as follows: Aim 1: Use qualitative interview methods to describe the taxonomy of domains health promotion and illness prevention behavior changes for which colorectal cancer survivors need new information, skills training and support. Aim 2: Explore colorectal cancer patients' perceptions of their post treatment functional status. Aim 3: Explore the impact of cancer, treatment, and co-morbidities on colorectal cancer patients' health goals and functional status.

The goal of this psychosocial research study is to learn about the knowledge, beliefs, and attitudes that people have toward screening for colorectal cancer. Another goal is to study how families communicate about colorectal cancer risk and colorectal cancer screening, with each other and with health care providers. Objectives: To evaluate psychosocial and external factors influencing colorectal cancer (CRC) patients' communication with their first-degree relatives (FDRs) about CRC risk and screening information. Using measures of knowledge, health beliefs and behavior, family closeness, openness and motivation to discuss CRC and screening, distress, provider support and background variables (sociodemographics, access to care, and medical history), we will conduct a cross-sectional study to evaluate factors influencing CRC patients' communication about CRC risk and screening information to their FDRs. To evaluate psychosocial and external factors associated with CRC screening behavior among first-degree relatives of CRC patients. Using measures of knowledge, health beliefs and behavior, family closeness and subjective norms, distress, provider interactions, benefits/barriers, and background variables (race/ethnicity, sociodemographics, access to care, and medical history), we will conduct a cross-sectional study of FDRs of CRC patients recruited under Aim 1 to evaluate factors associated with CRC screening behavior (specifically, colonoscopy adherence).

The purpose of this study is to investigate whether preoperative hepatic and regional arterial chemotherapy are able to prevent liver metastasis and improve overall survival in patients receiving curative colorectal cancer resection.