نتایج جستجو برای: colorectal tumor
تعداد نتایج: 494611 فیلتر نتایج به سال:
background:the present study compared the differences between survivals of patients with colorectal cancer according to their ethnicity adjusted for other predictors of survival. methods: in this prospective cohort study patients were followed up from definite diagnosis of colorectal cancer to death. totally, 2431 person-year follow-ups were undertaken for 1127 colorectal cancer patients once e...
INTRODUCTION In 2008, colorectal cancer represented the third most commonly diagnosed tumor in Spain, and the second tumor with more deaths. Despite the new potential biomarkers in colorectal cancer, there are many challenges that need to be overcome, resulting in a need for the standardization of its determinations. DISCUSSION The continuous advance in tumor disease knowledge makes this revi...
BACKGROUND & AIMS Tumor-initiating cells are a subset of tumor cells with the ability to form new tumors; however, they account for less than 0.001% of the cells in colorectal or other types of tumors. Mesenchymal stem cells (MSCs) integrate into the colorectal tumor stroma; we investigated their involvement in tumor initiation. METHODS Human colorectal cancer cells, MSCs, and a mixture of bo...
background and objective: egfr and her-2 are two members of erbb/her family of type i transmembrane growth factor receptors. cox2 is an enzyme responsible for the conversion of arachidonic acid to prostaglandins, which has a major role in angiogenesis and can modelate tumor growth. the aim of this study was to determine the level of expression of egfr, her-2 and cox2 in colorectd cancer. mater...
BACKGROUND The presence of peripheral circulating tumor cells indicates the possible existence of a tumor in vivo; however, low numbers of circulating tumor cells (CTCs) can be detected in peripheral blood of healthy individuals as well as patients with benign tumors. It is not known whether peripheral CTC counts differ between patients with benign colorectal disease and those with colorectal c...
OBJECTIVE CD133, a glycoprotein, is expressed in different types of human stem cells and tumor cells. Detection of altered CD133 expression in colorectal cancer tissues could be useful as a marker for the prediction of colorectal tumorigenesis, progression, and prognosis. METHODS A total of 19 fresh and 145 paraffin-embedded tissue specimens from colorectal cancer patients were obtained for d...
Colorectal cancer is the second leading cause of cancer-related deaths in the United States. Although noninvasive stool-based screening tests are used for the early detection of colorectal neoplasia, concerns have been raised about their sensitivity and specificity. A metabolomics-based approach provides a potential noninvasive strategy to identify biomarkers of colorectal carcinogenesis includ...
Purpose: Epithelial-to-mesenchymal transition (EMT) plays a pivotal role in tumor invasion and dissemination. EMT occurs predominantly at the tumor edge where it is induced by cytokines, the extracellularmatrix environment, or hypoxia. In the tumor cell, it is furthermediatedby several transcription factors and microRNAs. The aim of this study was to explore the expression of EMT-associated gen...
Background: Colorectal cancer is the most common malignant gastrointestinal cancer and the fourth most common cancer throughout the world. Disease staging is performed to select the treatment method. In this interventional study we evaluated the effect of adjuvant chemotherapy on local recurrence, distant metastasis and three-year disease free survival in patients with stage 2 colorectal cancer...
Background: Colorectal cancer is the fourth most common cancer, in terms of incidence throughout the world. There are some differences for risk factors involved in the incidence of tumor in different anatomical subsites of large bowel. However, most investigations have not studied the association between dietary factors and colorectal cancer subsites. Thus the current ecological study inves...
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