Active clinical trials for "Stomach Neoplasms"

The aim of this study is to evaluate survival benefit of a neoadjuvant chemotherapy regimen in patient with resectable locally advanced gastric cancer in comparison with surgery alone.

Gastric carcinoma is a disease with a high mortality. Peritoneal washing cytology has a recognized prognostic utility. However sensibility of this study is not appropriate. Studies with PCR (polymerase chain retrotranscription) can increase sensibility and accurate staging information. Objective: To analyze the sensibility and specificity of the expression of CK20, CEA and Ber-EP4 with PCR technique in peritoneal washings of advanced gastric carcinoma without clinical evidence of peritoneal carcinomatosis. Methodology: Retrotranscription analysis (RT-PCR) and quantitative PCR (qPCR) of CK20, CEA and Ber-EP4 in peritoneal washing. Test the feasibility of qPCR with this new marker (Ber-EP4). Comparison of the results with data obtained with conventional cytology. Study of peritoneal recurrence.

Helicobacter pylori (H.pylori) is a major human pathogenic bacterium in gastric mucosa which is linked to the development of gastritis, peptic ulcer disease, mucosa-associated lymphoid tissue lymphoma and gastric cancer. However the regulatory mechanism of H.pylori-induced immune response is not clear. Long non-coding RNA (lncRNA) has recently emerged as key post-transcriptional regulators of gene expression, differentiation. The investigators had a preliminary results which THRIL (TNFα and hnRNPL related immunoregulatory lincRNA) and PACER(p50-associated COX-2 extragenic RNA) played a potential role in H.pylori induced inflammatory cascade. However, there wasn't a previous study about expression of THRIL, PACER in a human tissue. Therefore, the investigators aimed to evaluate the expression of THRIL, PACER in patients with gastrointestinal disease according to H.pylori infection.

This study proposes to establish a CT radiomics-based prediction model for identifying metastasis of each station lymph nodes in gastric cancer.

Background: Gastric cancer (GC) is major global health concern and the second leading cause of cancer deaths worldwide. Amplification of Her2/neu gene and/or overexpression of the Her2/neu protein have been observed in GC. Trastuzumab (Herceptin™) is an anti-Her2/neu antibody, which has been successfully applied in GC. However, the intratumoral heterogeneity of Her2/neu overexpression and amplification in GC should be noticed. The investigators investigated the significance of evaluating Her2/neu expression in different paraffin blocks of tumor tissue in GC. Methods: 2000 GC patients from ten centers, patients were divided into a cohort using one tumor tissue paraffin block (cohort 1, n=1000) and a cohort using dual tumor tissue paraffin blocks (cohort 2, n=1000) when evaluating Her2/neu expression status by immunohistochemistry (IHC). In cohort 2, the investigators combined the results from two different paraffin blocks and used the higher one as the final score.

The purpose of this study was to compare the outcomes of medical augmented reality glasses and general monitors when distinguishing mucosal lesions from submucosal lesions in endoscopic diagnosis for early gastric cancer.

This study is divided into two parts: Part 1: An interventional study, with a pre-post study design to determinate the grade of knowledge of established GC risk factors. Part 2: An observational study to know impact on prevalence and infection eradication of H. pylori

The study uses a case-control design that examines the differences in types of exposures between cases defined with a pathological confirmation of GC diagnosis, and controls, defined as patients to whom a gastroscopy was indicated and confirmed absent of GC i

The pathogenetic mechanisms of chronic gastritis and gastric carcinoma are different. Whether metabonomics play a role in the development of chronic gastritis and gastric cancer is still a question. So the investigators want to clarify this question by this subject.

The aim of this study is to develop a CT scan-based radiomics predictive model about tumor regression grade (TRG) in patients with esophago-gastric junction (EGJ) ang gastric cancer undergoing perioperative chemotherapy. The molecular expression of the neoplasms will be evaluated to assess its association with the TRG and the radiomic features.