Active clinical trials for "Stomach Neoplasms"

S-1 is an effective drug in gastric cancer (GC) for palliative chemotherapy in Eastern and Western patients. Recently, S-1 has been also reported to be an effective adjuvant therapy for GC patients who received D2 surgery in Eastern Asian patients. Recently, the development of lacrimal drainage obstruction (LDO) caused by S-1 has been reported from some case and small-sized studies. The incidence of developing LDO has been estimated to about 15~20% of patients receiving S-1 therapy in some retrospective studies. However, there is no prospective report on the incidence of LDO in patients receiving S-1 chemotherapy. Moreover, the mechanism of developing S-1-induced LDO has not been systemically studied until now. Suggested mechanism of LDO involves direct secretion of S-1 into the tear. Therefore, this study was initiated to prospectively investigate the incidence of LDO in GC patients receiving adjuvant S-1 chemotherapy. In addition, the correlation between the development of LDO and the concentration of S-1 (or its metabolites) in tear and plasma will be explored. These results will help clinicians identify patients who are at high risk of developing S-1-associated LDO.

Gastric cancer (GC) is one of the most common and lethal cancers worldwide, especially in China, and the median overall survival for patients with advanced, metastatic GC remains only about 1 year. Several molecular profiling studies have demonstrated that a proportion of gastric cancer harbour actionable molecular alterations which shows a predictive benefit from a specific therapy (in any cancer type). In the current study, the efficacy of precision treatment for gastric cancer guided by multidimensional molecular biology profiling will be observed. The analysis focused on the overall survival outcomes for patients whose tumours harboured actionable molecular alterations and who received appropriately matched therapy.

The purpose of this study is to explore the influence of neoadjuvant chemotherapy in the long term quality of life with advanced gastric cancer patients.

The main aim was to assess the tumor vascular perfusion pattern in gastric cancer (GC). The investigators used dynamic contrast harmonic imaging endoscopic ultrasound (CHI-EUS) and the results were compared with the immunohistochemical expression of CD105 and clinico-pathological parameters.

Cancers of the upper gastro-intestinal tract, including esophagus (gullet), stomach and small bowel, are amongst the deadliest malignancies. The main reason for their high mortality rate is that they are usually diagnosed late when curative treatments are no longer effective. However, these types of cancer generally arise from well-described pre-cancerous diseases, such as Barrett's esophagus and gastric intestinal metaplasia. This provides an opportunity for clinicians to detect these pre-cancerous conditions early and offer adequate cure or clinical monitoring before they progress to cancer. A camera test (gastroscopy) is the gold-standard test to detect pre-cancerous diseases in these organs. There has been limited research to set the standards for performance of a gastroscopy, especially with regards to diagnosis of pre-cancerous conditions, which require knowledge and skills by the physician performing the test (endoscopist). Therefore, the hypothesis behind this study is that the aforementioned pre-cancerous diseases are understudied and often go undetected. This study aims to understand how often endoscopists should diagnose these pre-cancerous diseases on routine gastroscopy and help define the standards to measure performance. The investigators will assess the following rates: i. how often endoscopists diagnose these pre-cancerous lesions during endoscopy; ii. How often these conditions are diagnosed on biopsies taken according to a standardized protocol; iii. How often these condition should have been diagnosed by the endoscopists based on the review of pictures by expert endoscopists. The investigators will also compare the rates of correct diagnosis by endoscopists with different levels of experience and based on the times spent to complete the diagnostic test. Investigating these aspects will enhance the understanding of the medical community with regards to the diagnosis of these pre-cancerous lesions and set endoscopy standards to improve their early detection and treatment before they progress to cancer. This will translate to improved cancer prevention and benefit for patients.

Real World Data (RWD) obtained from real clinical sites is data obtained after administering a drug to patients with different characteristics in daily practice, and Real World Evidence (RWE) is established based on RWD. It is possible to overcome the disadvantage of RCT, which cannot reflect all the various variables in the actual clinical field as it is conducted for only subset of patients. Researchers planned to prospectively collect RWD of ramucirumab/paclitaxel combination therapy as 2nd-line chemotherapy in patients with locally advanced unresectable or metastatic gastric or gastroesophageal junction adenocarcinoma.

Background: Cancer-related fatigue (CRF), one of the indicators of QoL, is one of the most common side effects of cancer and its treatment. However, the pathophysiological mechanisms involved in CRF among cancer patients are not completely understood. Therefore, more in-depth researches on CRF of surgical patients suffering from gastric cancer are needed in Taiwan. Purpose: The purpose of this study is to examine the incidence rate and correlated factors (QoL and immune biomarkers) of CRF among gastric cancer patients undergoing major abdominal surgery. Method: A longitudinal study was conducted to recruit gastric cancer patients who scheduled to operate at surgical clinics from a northern medical center in Taiwan. The data will be collected with a structured questionnaire and Immune markers assessments via purposive sampling of 120 subjects. Before operation, on day 1 after operation, and on day 7 after operation, the biomarkers will be measured. The BFI-T questionnaire will be filled out before surgery and on day 1, 2, 7, 28 after surgery; The EORTC QLQ-C30 and EORTC QLQ-STO22 questionnaire will be filled out before surgery and on day 7, 28 after surgery; Type D scale-14(Taiwanese version) questionnaire will be filled out before surgery and on day 28 after surgery. Data will be analyzed by using descriptive statistics, paired t-test, Chi square test, Pearson's correlation, and the generalized estimating equation (GEE) was used to identify significant factors with QoL after operation. Anticipated achievement: The anticipated achievement of this study is to provide healthcare providers with more knowledge about CRF, and help them to enhance the quality of life on gastric cancer patients in the future.

The investigators prospectively collected the clinical data of Da Vinci robot-assisted radical gastrectomy patients conducted by the same group of physicians from October 2017 to October 2018. The learning curve of the surgery was analyzed with the moving average method and the cumulative sum analysis (CUSUM). The short-term efficacy was then validated by comparing the perioperative and pathologic outcomes of patients in the two stages of the learning curve.

The primary purpose of the study is to investigate the correlation between the efficacy and toxicity of S-1 on gastric cancers and the expression of thymidylate synthase (TS), dihydropyrimidine dehydrogenase (DPD) and orotate phosphoribosyltransferase(OPRT).

S-1 has been also shown to be an effective drug for palliative chemotherapy in Eastern and Western GC patients. Recently, some case and small-sized studies have been reported on lacrimal drainage obstruction(LDO)caused by S-1.Suggested mechanism of LDO involves direct secretion of S-1 into the tear; thus the concentration of S-1 metabolite in tear is expected to be high in patients who developed LDO than in patients without LDO. We investigate the concentration of S-1 and its metabolites in tear and plasma and find out its correlation with side effects such as LDO. These results will also help us identify patients who are at high risk of developing S-1-associated side effects.