Active clinical trials for "Stomach Neoplasms"

Infrapyloric artery(IPA) is of great importance for gastric cancer patients. According to previous study, the origin of IPA varies greatly among different studies. This trial aims to tell the distribution of IPA origin in Chinese patients.

Gastric cancer associated peritoneal carcinomatosis has a poor prognosis with a median survival of less than one year. Systemic chemotherapy including targeted agents has not been found to significantly increase the survival in Gastric cancer associated peritoneal carcinomatosis. Since recurrent gastric cancer remains confined to the abdominal cavity in many patients, regional therapies like aggressive cytoreductive surgery and hyperthermic intraperitoneal chemotherapy have been investigated for Gastric cancer associated peritoneal carcinomatosis. Hyperthermic intraperitoneal chemotherapy has been used for three indications in Gastric Cancer- as an adjuvant therapy after a curative surgery, hyperthermic intraperitoneal chemotherapy has been shown to improve survival and reduce peritoneal recurrences in many randomised trials in Asian countries; as a definitive treatment in established PC, hyperthermic intraperitoneal chemotherapy along with cytoreductive surgery is the only therapeutic modality that has resulted in long-term survival in select groups of patients. While the results of randomised trials of adjuvant hyperthermic intraperitoneal chemotherapy from western centres are awaited, the role of hyperthermic intraperitoneal chemotherapy in the treatment of Gastric cancer associated peritoneal carcinomatosis is still evolving and needs larger studies before it is accepted as a standard of care.

Background: Gastric cancer is a leading cause of cancer deaths around the world. This disease is a serious problem in places like East Asia, Central and South America, and Eastern Europe. Researchers want to study the causes of gastric cancer and its precursors. They want to reduce the number of people with stomach cancer. Objectives: To learn more about bacteria factors and other causes of gastric cancer. To study potential markers associated with precancerous gastric lesions (intestinal metaplasia). Eligibility: Adults ages 40-70 years at certain hospitals in Chile who: Are going to have upper gastrointestinal endoscopies OR have stomach cancer and need surgery Design: Participants will give gastric tissue samples. Some participants will donate a portion of the stomach tissue that is removed as part of their clinical care. Participants will give access to reports of their stomach exam. They will allow researchers to photograph the microscope slides of their tissue samples. Participants will answer questions. The topics of the questions include: Age, height, weight Education Habits including tobacco and alcohol Personal and family history of disease Reproductive history Diet Some participants will give blood, urine, saliva, and stool samples. Study staff will collect the blood. They will tell the participants how to collect the other samples themselves.

The aim of the present study was to evaluate characteristics of background mucosa in early gastric cancer (EGC), and to seek for the optimal assessment for EGC screening.

Despite the declining incidence, gastric cancer (GC) remains the second leading cause of cancer death worldwide. In France, it is the second digestive cancer with 7,000 new cases per year. It is now well demonstrated that patients with H. pylori infection, atrophic gastritis and intestinal metaplasia, have a high risk of developing GC. It is therefore important to detect these pre-neoplastic lesions at an early stage to improve patients prognosis. Thus, the aim of this project is to investigate the possible screening of gastric precancerous lesions by a blood test (GastroPanel®) in France, in patients with oesophagogastroduodenoscopy (EGD) prescription.

The pattern of lymph node metastasis of the gastric cancer to each geographic lymph nose stations and the relation between each metastasis and survival are to be analyzed by retrospective review of medical records of who enrolled in the CLASSIC trial (NCT00411229) which have compared adjuvant chemotherapy and no adjuvant therapy after radical gastrectomy with extended lymphadenectomy.

Videoendoscopy is the standard tool for examination of gastrointestinal tract. However, precancerous lesions and early gastric cancer can be easily missed by routine videoendoscopy. Autofluorescence Imaging (AFI) and Narrow band imaging (NBI) are 2 new imaging systems used in endoscopy which are recently developed. AFI based on the presence of natural tissue fluorescence on the gastrointestinal tract. By computation of the difference in the reflecting images, the system can reveal early cancers that are not detectable by standard endoscopy. NBI is a high resolution imaging using lights with narrowed wavelength range, which able to enhance the fine structure of the mucosa. Recent studies suggested combined AFI and NBI can improve the detection of early esophageal and gastric cancers. The investigators are conducting a prospective randomized cross-over study to compare the accuracy between this combined AFI/NBI imaging with standard videoendoscopy in the detection of precancerous lesions and gastric cancer in a high risk population inSingapore. The investigators hypothesis is that this new combined imaging system improves the investigators detection of high risk lesions of stomach.

The goal of this study is to study NIS expression in benign and malignant breast and thyroid samples using archival formalin-fixed paraffin-embedded tissue sections.

Peritoneal metastases appear in a great proportion of patients affected by gastric carcinoma. Involved mechanisms are poorly understood though experimentally it has been demonstrated that neoplastic cells exfoliated from primary tumor can only implant and proliferate in areas of damaged peritoneum. Objectives: to study ultra-structure of peritoneal surface by electronic microscopy in control subjects and in patients with early or locally advanced gastric cancer looking for spontaneous changes in peritoneal surface not related with surgical injury.

To assess the role of germline polymorphisms in xenobiotic metabolism genes in toxicity profile. To assess the role of germline polymorphisms in genes associated with DNA repair, p53 tumor suppressor gene and angiogenesis pathway in predicting recurrence and survival in gastric cancer patients treated with adjuvant chemotherapy.