Active clinical trials for "Stomach Neoplasms"

Gastric cancer is one of the most common malignancies in China. Early detection is critical for gastric cancer management. However, the diagnosis rate of patients with early gastric cancer is still low. Therefore, the investigator design this study to access whether pre-endoscopic screening risk assessment of genetic and environmental risk factors could improve early gastric cancer diagnosis rate.

One paraffin block is routinely used for Human Epidermal Growth Factor Receptor 2 (Her2/neu) immunohistochemistry (IHC) assessment. Here, investigators investigated if picking two or multiple paraffin blocks for Her2/neu evaluation is an economical, efficient and practical method, which may reduce false-negativity of Her2/neu IHC assessment due to intratumoral heterogeneity.

Patients with gastric adenocarcinoma Comparison: perioperative chemotherapy vs. adjuvant therapy. Sample size differences between the two groups. Kaplan meier survival analysis, overall survival and disease free survival

we explore the learning curve and the impact of technique optimization on surgical outcomes and the first to construct a referenceable learning phase for performing robotic gastric cancer surgery.

The aim of this study is to identify biomarkers predicting response or resistance factors of a targeted therapy with trastuzumab in advanced gastric cancer.

AIM Verified if the first stage of the Train the trainer (TTT)plan could improve the young endoscopist's ability to detect the early gastric cancer（EGC）. METHOD a retrospective analysis of the ten young endoscopist's painless gastroscopy examination from January 1, 2014 to December 31, 2014. According mainly to the endoscopic report and pateint's History, quantity of gastroscope, gastric cancer and the early gastric cancer. the first step of the train the trainer plan(TTT) activised in March 19-20,2015,which including the diagnosis and operation "hand in hand" teach by Professor Yano Takeshiin,and the case discussion,and so on. Five young endoscopist accepted the TTT plan and the other five not accepted. The five doctors who accepted the TTT do the gastroendoscopy in accordance with the TTT content (for the T1 period),.(1) the patient's name, (2)gender, (3)age,(4)past medical history (Helicobacter pylori<HP>, gastritis, gastric ulcer, oral drug operation, etc.),（5）gastroscope operation time,(6)the location of the lesion- longitudinal (upper, middle and lower),(7) the location of the lesion -circumferential (lessor curvature, Greater curvature, anterior wall, posterior wall),(8) lesion size, (9)conventional white-light imaging (red, white, no change), (10)magnifying endoscopy with narrow-band imaging (EM-NBI) microvascular and mirosurface pattern VS classification system(VSCS) (boundaries, microvascular pattern and microsurface pattern; don't do it), (11)microscopy types (uplift type, flat type, concave type or IIc I/IIa or IIb), (12)histological type (differentiated and undifferentiated type) and (13) pathological (low grade neoplasia, high-level neoplasia etc.). For the treatment of endoscopy submucosal dissection (ESD) patients, further pathological results were recorded after ESD, including the pathology, edge and basal conditions. The other five doctors do the gastroendoscopy as they do before. (300 cases / person) 2-4 TTT activity ;The five doctors who accepted the TTT do the gastroendoscopy in accordance with the TTT content (for the T2-T4 period),.The other five doctors do the gastroendoscopy as they do before. Statistics the number of early gastric cancer have been found by the five young doctors, and how mang gastroscopy they have done.pay attention to The rates of EGC detection.

i. To determine whether Confocal Laser Endomicroscopy (CLE) with optical biopsy and targeted mucosal biopsy improves the diagnostic yield of gastric IM/IN/CA in high risk populations compared to WLE with standard biopsy protocol. ii. To determine whether CLE with optical biopsy and targeted biopsy, as compared to WLE with standard biopsy, can reduce the number of biopsies needed per patient for detection of gastric IM/IN/carcinoma without the loss of corresponding diagnostic yield. iii. To compare the sensitivity and specificity of CLE with WLE for the detection of gastric IM/IN/CA.

When performing screening endoscopy, small focal gastric lesions are frequently encountered. Novel techniques in endoscopy, such as magnifying endoscopy (ME) with narrow-band imaging (NBI) and chromoendoscopy with acetic acid-indigocarmine mixture (AIM), are developing to enhance images of gastrointestinal tumor. Furthermore, observation of the microstructures of gastric mucosa by ME, including microvascular pattern and microsurface pattern, has been proposed in the recognition of early gastric cancer (EGC). This study is based on the hypothesis as follow: The microvascular structure could be clearly observed with magnifying endoscopy enhanced by narrow-band imaging (ME-NBI). The microsurface architecture could be clearly observed with magnifying endoscopy enhanced by acetic acid-indigocarmine mixture (ME-AIM). Enhanced ME (combining ME-NBI and ME-AIM), as compared to white-light endoscopy (WLE), has higher sensitivity and specificity for the differential diagnosing small focal gastric lesions.

To determine the maximum-tolerated dose (MTD) and dose-limiting toxicity (DLT) of sorafenib in combination with FOLFOX4 (oxaliplatin/leucovorin/5-fluorouracil) as first-line treatment for advanced gastric cancer The design of the study incorporated a standard 3 + 3 dose escalation procedure to guide elevation of the sorafenib dosage to the next level

Gastric cancer is the second leading cause of cancer deaths in the World. In China, gastric cancer exceeds all other cancer mortality except lung cancer. Helicobacter pylori infection is an important cause of gastric cancer. We have previously started a randomized placebo-controlled chemoprevention trial in Changle in 1994 to address the issue of whether eradication of H. pylori alone is able to prevent or reduce the risk of gastric cancer. The project involved 1600 subjects and is still ongoing. On the other hand, our laboratory research indicated that an abnormally high expression of an enzyme cyclooxygenase-2 was found in gastric cancer and inhibition of this enzyme by a new drug (specific cyclooxygenase-2 inhibitor) could kill the cancer cells. The same drug is approved now for use in treatment of hereditary colon cancer syndrome (Familial Adenomatous Polyposis, FAP), in the same rationale of tumour suppressive property of this drug. We are now initiating a second chemoprevention study to assess the addition of this specific cyclooxygenase-2 inhibitor together with eradication of H. pylori on prevention or reduction of the risk of gastric cancer and to assess whether the combination can reverse pre-cancerous lesions in the stomach in the high-risk population. The proposed site is Shangdong, China with very high prevalence of pre-cancerous lesions in asymptomatic H. pylori carriers. We plan to recruit 1500 H. pylori positive subjects for this randomized placebo-controlled study. H. pylori carriers will be randomized to receive treatment for the infection or placebo, followed by specific COX-2 inhibitor or placebo for 3 years. The results will have significant impact on prevention of gastric cancer on a national scale and worldwide.