Active clinical trials for "Adenoma"

This two parallel arms, randomized, multicenter trial is aimed at evaluating whether TXI is superior to WLI endoscopy in terms of adenoma detection. Secondary aims will be advanced adenoma detection rate, serrated polyp/adenoma detection rate, as well as procedure variables such as withdrawal time.

This is a prospective randomised trial comparing the proximal adenoma detection rate and miss rate by blue laser imaging (BLI), narrow band imaging or white light colonoscopy.

The investigators are studying the ability of F18 labeled fluorocholine PET to localize parathyroid adenomas in patients with hyperparathyroidism prior to surgery.

A prospective randomised controlled trial of cold vs hot snare polypectomy of non-pedunculated colorectal adenomas.

Prospective, randomized multi-center trial. Comparison of Endoscopic Mucosal Resection (EMR) versus Endoscopic Full-Thickness Resection with the duodenal Full-Thickness Resection Device (dFTRD) of non-ampullary duodenal adenomas.

This study investigated the impact of Endocuff-assisted colonoscopy on the adenoma detection rate at colonoscopy. This study involved patients undergoing elective screening or surveillance colonoscopy. Patients were randomized to undergo Endocuff or regular, high-definition colonoscopy before undergoing a second colonoscopy by the alternate method. The primary outcome measure was the detection rate for adenomas between patients who underwent Endocuff first and patients who underwent regular colonoscopy first.

Our main objective is to assess whether aortic stiffness is a predictor of blood pressure response after surgery in patients with an aldosterone producing adenoma or a unilateral adrenal hyperplasia.

Over the last years a number of new endoscopic imaging modalities have been introduced (high-definition and virtual chromoendoscopy). Given the theoretical advantage of these new imaging techniques, the investigators aimed to investigate their use for the detection of polyps during colonoscopy.

The adenoma detection rate by colonoscopy for asymptomatic individuals aged 50 years and older is estimated to be at least 25%. It is known that during colonoscopy, lesions may be missed. Image enhanced endoscopy techniques have been evaluated for the detection and differentiation of colonic polyps. Narrow band imaging (NBI), is one such technique. The common classification systems used predict histology is the NICE and the Sano and JNET classification. The NICE classification can be used without optical magnification; it evaluates the color of the lesion, regularity of the overlying vessels and regularity of the surface pattern. The Sano and JNET classification requires optical magnification in order to assess the capillary patterns such as whether there is dilation, irregularity or loss of irregular capillaries over the lesion. In the context of adenoma detection, the results are more contentious. A meta-analysis of randomized studies examining the utility of the first generation NBI system when compared to high definition WLI showed no difference in detection rates. A criticism of the NBI system had been the dark endoscopic view; this is a result of the optical filter, and can limit the far view. A second generation NBI system has since been developed. It is characterized by much brighter illumination despite the optical filter, and thus the far view is improved. A recent randomized controlled study compared the second-generation NBI system with high definition WLI. NBI was shown to improve polyp and adenoma detection rates compared to WLI. Blue laser imaging (BLI) is another form of narrow bandwidth imaging developed by Fujifilm Corporation (Tokyo, Japan). Instead of using an optical filter for white light to produce narrow bandwidths, the BLI system has a unique feature of illumination using two lasers and a white light phosphor to accomplish the visual enhancement of surface vessels and structures. This study aims to determine whether BLI can increase the detection rate of colonic polyps and adenomas when compared to white light endoscopy, with the null hypothesis being no difference in detection rates. This study will also examine the use of NICE and Sano/ JNET classification systems to predict histology with the BLI system.

The proposed research aims to determine the prevalence, size, shape and histology of flat colorectal neoplasms in a cohort of asymptomatic, average-risk individuals presenting for screening colonoscopy. Patients will be randomized to either conventional colonoscopy or chromocolonoscopy, where the entire colon will be sprayed with indigocarmine dye and examined in the usual manner. The primary outcome will be the total number of adenomas detected, with special attention to the subgroup of flat and depressed lesions. To promote the generalizability of the results, neoplasms will be described according to standard Western and Japanese classification schemes.