Active clinical trials for "Gastrointestinal Stromal Tumors"

The purpose of this study is to compare sensitivity, specificity and accuracy of PET, DW MRI and CT separately and combined for the evaluation of treatment response and progression-free survival in patients with GIST.

This is a retrospective analysis and description of the preferred diagnostic and treatment methods employed on GIST on the Region of Coquimbo from 2003 to 2008.

The goal of this observational research study is to establish a registry of information regarding how different physicians treat and manage patients with gastrointestinal stromal tumors (GISTs). Objectives: To describe variation in management of patients with GIST, overall and by patient and provider characteristics. To provide participating physicians with information regarding management of their patients with GIST compared to the aggregate experience of all physicians participating in the Registry.

The treatment of advanced gastrointestinal stromal tumours (GIST) has shifted since the arrival of targeted therapies. Imatinib is an active multikinase inhibitor that mainly targets C-kit tyrosine-kinase receptors and the platelet-derived growth factor receptor. Imatinib use has been validated for adjuvant and palliative therapy settings. Imatinib is generally well-tolerated and known to improve performance status but up to 16% grades 3-4 toxicities, leading to at least 40% withdrawals, have been reported. Recently, in oncology, sarcopenia was shown to be a predictor of severe toxicity patients included in phase 1 trials, suggesting that it should be considered an inclusion criterion for such studies. Sarcopenic patients had low performance status, shorter survival, more chemotherapy toxicities and post-operative infections, and longer post-operative hospitalization times. In addition, exposure to tyrosine-kinase inhibitors (e.g. sorafenib or sunitinib) has been associated with dose-limiting toxicity (DLT) in patients with renal cell or hepatocellular carcinomas. Computed tomography (CT) scans acquired during routine care have been validated as an accurate and robust imaging technique to evaluate sarcopenia in cancer patients.

This is a retrospective medical record abstraction to evaluate the patterns of care for Gastrointestinal stromal tumors (GIST) in the community setting. Patient demographics and characteristics along with the treatments received will be described. Investigators will establish the percentage of patients who undergo surgery, the percentage of patients who are treated with kinase inhibitors as well as in what setting (adjuvant or metastatic) as well as the duration of therapy. Physician information will also be collected to assess for differences in treatment based on physician or geographical differences.

Endoscopic ultrasound (EUS)-guided fine needles with side fenestrations are used to collect aspirates for cytology analysis and biopsy samples for histologic analysis. The investigators conducted a large, multicenter study to compare the accuracy of diagnosis via specimens collected with fine-needle biopsy (FNB) versus fine-needle aspiration (FNA) for patients with lesions requiring immunohistochemistry (IHC) pathological diagnosis.

This observational study is proposed to evaluate if the trend in the levels of cf-DNA evaluated on a sample of peripheral blood may be related to different clinical behaviors of the disease monitored by radiological investigations conducted.

Our study aims to evaluate the role of Dickkopf-4 as biomarkers in the treatment of gastrointestinal stromal tumor.

For patients of GIST (Gastrointestinal Stromal Tumor), Imatinib has been widely used in GIST with KIT or PDGFRA sensitive mutations. From clinical points of view, individual differences often occur between different patients, leading diverse effect in ADR and drug effect. Meanwhile, the drug effect and adverse drug reaction was significantly influenced by the pharmacokinetic factors and pharmacodynamic and other factors. In this research, we try to establish a more sensitive method to detect sensitive mutations in plasma and discover the correlation between somatic and germline mutations, plasma trough concentration and drug effect, the association between ADME-associated SNP, Target/Receptor/Pathway-associated SNP, trough concentration and TKI adverse effect. Furthermore, in vivo and in vitro research is also crucial for rational explanation for these clinical phenomenon.

Evaluate the reliability of morphology standards for GIST pathologic type, staging and grading by retrospective analyzing clinical data; on this basis, establish a GIST standardized and individualized treatment mode to maximum benefit GIST patients, avoid under- and over-treatment.