Active clinical trials for "Neoplasms"

The Mast Cell Connect Registry is a voluntary, observational database that will capture demographic, socioeconomic, and disease information directly from patients with mastocytosis via a secure web-based tool. No experimental intervention is involved.

Sympathetic activity could be increased during robot-assisted laparoscopic gastrectomy, which is performed in a head up position under CO2 pneumoperitoneum. Stimulation of the sympathetic nervous system prolongs the QT interval and can increases the susceptibility to life threatening cardiac arrhythmias. Thus the investigators decided to evaluate the heart-rate corrected QT interval (QTc interval) during robotic-assisted laparoscopic gastrectomy.

The investigators will perform a pilot study to gain insight into attitudes, barriers and facilitators for health behavior change in cancer patients and their partners. Results of this pilot will be used to design suitable questionnaires to investigate health behavior change in a larger cohort of patients and their partners. It will also direct future interventions to adequately target patients and, potentially, their partners to improve their lifestyle following a cancer diagnosis.

Prevalence and prognostic significance of polypharmacy has not been evaluated in adults undergoing treatment for AML. Investigating the significance of polypharmacy in this population may help improve patient assessment and provide an opportunity to design simple interventions to minimize unnecessary morbidity associated with treatment.

Pulse pressure variation (PPV) is a well-known and widely used dynamic preload indicator based on heart-lung interaction to predict fluid responsiveness. Generally, patients are considered to be fluid-responsive when the PPV value larger than 11-13%. However, several previous researches demonstrated that there is a zone of uncertainty (grey zone) in PPV. To predict fluid-responsiveness accurately in the patients with PPV within grey zone (9-13%), the investigators would evaluate the augmented PPV using augmented ventilation.

The investigators evaluate if there are radiation dosimetric parameters for the prediction of biochemical and clinical hypothyroidism after intensity-modulated radiation therapy (IMRT) for non-metastatic nasopharyngeal carcinoma (NPC).

The aim of the project is to study the role of minimally invasive imaging methods, such as magnification endoscopy with narrow-band imaging (M-NBI) combined with confocal laser endomicroscopy (CLE), in correlation with immunohistochemical analysis, for assessing the angiogenesis status of patients with gastrointestinal tumors, in particular with colorectal and gastric cancer. Angiogenesis, i.e. the process of forming new blood vessels, represents an essential event for tumor growth and metastasis and the importance of its understanding stems from potential applications for diagnosis, prognosis stratification and mainly from the possibility of developing and improving targeted therapies. While current methods for evaluating tumor vascularity are based on immunohistochemistry techniques with microvascular density (MVD) calculations, these imply repeated tissue sampling and are not feasible in the context of clinical practice. Imaging techniques might overcome limitations associated with MDV measuring, obtaining both functional and morphological information and enabling repeated evaluations that are necessary for the assessment of a dynamic process as angiogenesis during follow-up of targeted therapies. NBI is a digitally enhanced endoscopic imaging technique that uses optical filters to illuminate tissue with light at blue and green wavelengths. These are selectively absorbed by hemoglobin and, as a result superficial vascular networks are highlighted and morphological changes in capillary patterns can be described for different lesions. CLE represents a revolutionary technology that enables endoscopists to collect real-time in vivo histological images or "virtual biopsies" of the gastrointestinal mucosa during endoscopy, and has raised significant interest for the potential clinical applications and numerous research possibilities. After intravenous administration of fluorescein as a contrast agent, CLE enables real-time visualization of the tumor vasculature, which is structurally and functionally altered compared to the normal vascular networks. Therefore M-NBI will be used for enhanced visualization of morphological changes of the superficial capillaries, while CLE will be directed towards vascular regions of interest for characterization of these changes at the microscopic level. Furthermore, imaging studies will be backed by MVD calculation using immunohistochemical methods, based on tissue samples harvested during endoscopic procedures.

Prospective study to test whether the immunochemical fecal occult blood test (FIT) for colorectal cancer (CRC) helps to prioritize patients with iron deficiency anemia for colonoscopy.

The aim of this trial is to determine the performance characteristics of the Cxbladder test for the detection of recurrent urothelial carcinoma (UC) in patients with a recent history of urinary tract UC, who have been treated according to standard practice and are undergoing routine investigative cystoscopy. The gold standard for determination of clinical truth is cystoscopy, plus any follow up investigations relating to the current visit.

The purpose of this study is to determine whether genetic markers unique to liver cancer are present and to assess usefulness as a diagnostic tool.