Active clinical trials for "Stomach Neoplasms"

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.

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.

This is a prospective and observational clinical study for seeking out a better way to predict the pathologic complete response (pCR) in patients with advanced gastric cancer (AGC) based on the post-neoadjuvant treatment Magnetic Resonance Imaging (MRI) and CT data. This study will help the surgeons to better formulate treatment regimens for gastric cancer in the clinical practice.

Based on the gastric cancer database established earlier, this project explored the PG standard suitable for Chinese people, and further explored the establishment of machine learning model to stratify gastric cancer risk in the population, guide the frequency of gastroscopy screening, and extract important gastric cancer risk factors from it.Establish electronic health records of gastric organs, track the development and outcome of gastric diseases through deep learning method, in order to predict the development and outcome of gastric diseases;Then, the simulation hypothesis deductive method is used to compare the outcomes that may be caused by different lifestyles with the help of deep learning model, so as to guide patients to develop a better lifestyle and explore the establishment of health management paths for gastric cancer patients and high-risk groups in China.

Concurrent chemotherapy with external beam radiotherapy is the standard treatment of bulky or locally advanced cervical cancer, gastric cancer and rectal cancer.Despite excellent therapeutic results, acute hematologic toxicity (HT) is common with this regimen. Previous studies have founded acute HT was significantly associated the volume of pelvic (PBM) and lumbosacral bone marrow (LSBM) receiving 10 and 20 Gy radiation (RT). Therefore, reducing the volume of BM receiving low-dose RT might prevent HT. More than one-half of the body's bone marrow (BM) is located in the PBM, LSBM and proximal, where is just in the low dose of RT in patients with gastric, rectal and cervical cancer. Previous study have demonstrated highly conformal IMRT treatment plans reduced the volume of PBM irradiated resulting in less HT. We have since assumed that even better BM sparing is possible when the BM is entered as a separate constraint in the planning process. However, it is well known that hematopoietically active (red) BM is poorly visualized with computed tomography (CT). Consequently, the entire contents of the medullary canals must be entered as BM. Yet, a considerable portion of the medullary canal is comprised of inactive (yellow) marrow, which is composed primarily of fat. Contouring the entire medullary canals on CT thus overestimates the volume of active BM, unnecessarily constraining the IMRT plan. An alternative approach is the incorporation of functional BM imaging into the treatment planning process. One economical and efficiency approach involves the use of T1-weighted magnetic resonance (MR) images. Therefore, we designed this study to test whether a separate constraint of active BM identified by MR could reduce acute HT in course of concurrent chemoradiotherapy for patients with gastric and rectal cancer.

To assess the predictive value of circulating tumor cells (CTCs) for recurrence of advanced gastric cancer after radical resection. To identify the relationship between the detection of circulation tumor cells and recurrence patterns of gastric cancer after radical resection.

This prospective cohort study aims to assess the incidence of gastric cancer in patients with intestinal metaplasia in body of stomach or angular incisure. As secondary objectives, among the patients included in the cohort, the study will: assess the incidence of low grade dysplasia, assess the incidence of high grade dysplasia in patients with low grade dysplasia, identify risk factors of progression to dysplasia and gastric cancer.