Active clinical trials for "Polyps"

The primary objective is to determine the sensitivity and specificity of two Colorectal Cancer (CRC) screening methods, including stool DNA test and blood mRNA test, for colorectal cancer in Chinese population, with colonoscopy as reference method. Lesions will be confirmed as malignant or precancerous by colonoscopy and histopathologic examination. The secondary objective is to compare the performance of these two CRC screening methods to a commercially available FIT assay, both with respect to cancer and advanced adenoma. Lesions will be confirmed as malignant or precancerous by colonoscopy and histopathologic examination.

Primary objective of the study is to evaluate if the novel virtual polyp sizing tool accuracy in determining the size class of polyps among diminutive (0-5 mm), small (6-9 mm) and large (10 mm and above).

Computer aided detection (CADe) algorithms have been developed to overcome human errors and assist endoscopists in detecting more polyps during colonoscopy. The aim of this study was to investigate the accuracy of the novel Pentax Discovery CADe system (Discovery-AI) against pre-recorded videos of colon polyps of various size, shape and pathology while using videos of normal colon segments as controls from two different institutes.

With this study, the investigators plan to review the clinical, epidemiology, pathology, and endoscopic features of colon serrated lesions as well as outcome of endoscopic resection of these lesions. The findings will help us define the natural history of colon serrated lesions, develop techniques for endoscopic management of patients with serrated lesions, and identity areas for improvement. The data will be used for continuing quality improvement and presenting our outcomes at academic meetings and publishing our results in peer reviewed journals.

The endoscopist performances in the optical diagnosis (OD) of colonic polyps with the available technologies vary widely across centers and across endoscopists. The OD process is strictly related to the operator training and expertise. Most of the available studies in optical characterization have been carried out by expert endoscopist in tertiary high volume centers, and weren't replied on large unselected populations. For these reasons, at the moment the optical characterization of polypoid lesions can't replace, in the everyday clinical practice, the histopathological evaluation of resected polyps. Artificial intelligence (AI)-based systems have the potential to make optical characterization process of colonic polyps easier and more reliable, thus supporting the endoscopist in the application of leave-in-situ and of resect-and-discard strategies. The implementation of such strategies would lead to a significant economic saving and a decrease of risks and complications related to unnecessary polypectomy. GI-Genius System (Medtronic Inc, Minneaopolis, USA) is a CNN-based algorithm allowing an automatic OD of colonic polyps. This system does not require dedicated light setting for polyp evaluation as it works with white light high definition images, which are the actual standard in every endoscopic unit. During colonoscopy, when a polyp is framed within the screen, a green detection box surrounds the polyp and the system automatically provides (whenever possible) the optical diagnosis labeling the polyp as "adenoma or non-adenoma". When the automatic polyp charaterization is unfeasible the label "no prediction" appears. Nowadays only few data about the feasibility and performances of this system in clinical practice are available. In addition published studies are mostly focused on technical rather thann clinical issues. The present prospective observational trial is primarily aimed at evaluating the diagnostic accuracy of optical characterization of colonic polyps <= 1 cm using GI-Genius System in daily clinical practice, having histopathology examination as reference standard.

Gallbladder polyps are often detected incidentally by ultrasonography. The most of gallbladder polyps are non-neoplastic such as cholesterol polyps and do not need further treatments. However, neoplastic polyps, which need additional treatments to prevent malignancy, show the same appearance on ultrasound. Clinically, the differential diagnosis between cholesterol polyps and adenomatous polyps is very important for patient follow-up and treatment. However, differential diagnosis between these two conditions is difficult using conventional trans-abdominal ultrasound. Endoscopic ultrasound (EUS) is less affected and disturbed by subcutaneous fat or intraabdominal air, so a clearer image of pancreatobiliary system can be obtained. In addition, EUS elastography and contrast enhanced EUS are recently introduced. EUS elastography enables practitioners to evaluate the stiffness of a target lesion and compare it with surrounding tissues (strain ratio). Also, contrast enhanced EUS is used widely with additional information such as presence of vessels and enhancement pattern of soft tissues. Several studies have been published that EUS elastography can help in the differential diagnosis of pancreatic solid lesions. Although studies have been conducted to confirm the usefulness of transabdomnial ultrasound with elastography or contrast enhancement at differentiating gallbladder polyps, no prospective studies have been conducted to evaluate the usefulness of EUS elastography or contrast enhanced EUS for gallbladder polyp. Therefore, with this prospective study, we would like to evaluate the diagnostic value of EUS elastography and contrast enhanced EUS for differential diagnosis of gallbladder polyps.

With this study, the investigators plan to review the performance of colonoscopic resection of large (> 1 cm) and flat lesions in the colon. The findings will help us define the role of colonoscopic resection of colon polyps and flat lesions and identity areas for improvement. The data will be used for continuing quality improvement and presenting our outcomes at academic meetings and publishing our results in peer reviewed journals.

Primary Objective: - To describe the clinical characteristics of participants with chronic rhinosinusitis with nasal polyps (CRSwNP) in terms of disease severity, Type 2 inflammation-related comorbidities (such as asthma and allergic rhinitis), other associated comorbidities, and treatments used in a real-world setting Secondary Objectives: Describe the progression in treatment outcomes at different visits (baseline, 3 months, 6 months, and 12 months). To assess the healthcare resource utilization of participants with CRSwNP in countries of the Gulf region (number of visits, emergency room (ER), surgery, etc).

Correct endoscopic prediction of the histopathology and differentiation between benign, pre-malignant, and malignant colorectal polyps (optical diagnosis) remains difficult. Artificial intelligence has great potential in image analysis in gastrointestinal endoscopy. Aim of this study is to investigate the real-time diagnostic performance of AI4CRP for the classification of diminutive colorectal polyps, and to compare it with the real-time diagnostic performance of commercially available CADx systems.

Verapamil is an L-type calcium channel blocker(CCB) which has been shown to reduce inflammation in a variety of tissues. Chronic rhinosinusitis with nasal polyps (CRSwNP) is characterized by eosinophilic inflammation as well as P-gp overexpression. A previous trial of oral Verapamil showed preliminary efficacy for the treatment of CRSwNP. The goal of this study is to evaluate the safety and efficacy of intranasal Verapamil in CRSwNP. The study was initially approved as a Phase Ib/II, but only the Phase Ib portion was completed as part of this protocol.