Chromoscopy-Guided Endomicroscopy Increases the Diagnostic Yield of Intraepithelial Neoplasia in Ulcerative Colitis

Background & Aims: Because of the large number of biopsy specimens, surveillance colonoscopy in ulcerative colitis (UC) is currently time consuming and significant flat lesions still may be missed. In this study we assessed the value of combined chromoscopy and endomicroscopy for the diagnosis of intraepithelial neoplasias in a randomized controlled trial. Methods: A total of 161 patients with long-term UC in clinical remission were randomized at a 1:1 ratio to undergo conventional colonoscopy or chromoscopy with endomicroscopy. Eight patients were excluded because of insufficient bowel preparation. In the conventional colonoscopic group (n = 73), random biopsy examinations and targeted bio…

15. Mainzer Allergie-Workshop 2003

Diagnosing Helicobacter pylori in vivo by confocal laser endoscopy.

Background & Aims: Confocal laser endomicroscopy enables subsurface microscopic imaging of living tissue during ongoing endoscopy. This case report describes the in vivo detection of Helicobacter pylori by endomicroscopy.Methods: Endomicroscopy (Pentax, Tokyo, EC-3870CIFK) was performed by using two different contrast stains: Topical Acriflavine in addition to intravenously applied fluorescein netted the surface and allowed identification of focal accumulation of Helicobacter pylori at the surface and in deeper layer of the gastric epithelium. Biopsies were performed at the antrum and corpus for urease testing and histology. In addition, biopsies were cultured for Helicobacter pylori. Cultu…

Confocal laser endoscopy for diagnosing intraepithelial neoplasias and colorectal cancer in vivo

Background & Aims: Aconfocal laser endoscopy system has recently been developed that may allow subsurface imaging of living cells in colonic tissue in vivo. The aim of the present study was to assess its potential for prediction of histology during screening colonoscopy for colorectal cancer. Methods: Twenty-seven patients underwent colonoscopy with the confocal endoscope using acriflavine hydrochloride or fluorescein sodium with blue laser illumination. Furthermore, 42 patients underwent colonoscopy with this system using fluorescein sodium. Standardized locations and circumscript lesions were examined by confocal imaging before taking biopsy specimens. Confocal images were graded accordin…

Vergleich der lokalen Effektivität und des Metastasierungsverhaltens nach Resektion, Kryotherapie und Lasertherapie an einem colorectalen Tumormodell in der Leber der Ratte

A rat colon cancer cell line (CC531) was implanted into the livers of 85 WAG rats and in animals surviving the implantation the liver tumour was subsequently treated with sham laparotomy (n = 15), resection (n = 20), cryotherapy (n = 19) or laser therapy (n = 20). Local recurrence or persistence of the tumour in animals surviving the procedure was observed in 15 of 15 following sham laparotomy, in 0 of 15 following resection, in 3 of 17 following cryotherapy and in 10 of 14 following laser therapy. However, peritoneal disease and lung metastases were more frequent and extensive following resection as compared to cryotherapy or laser therapy.

Minimal Change Esophagitis: Prospective Comparison of Endoscopic and Histological Markers between Patients with Non-Erosive Reflux Disease and Normal Controls Using Magnifying Endoscopy

<i>Introduction:</i> More than half the patients with gastroesophageal reflux disease (GERD) show no endoscopic abnormality or minimal change esophagitis (non-erosive reflux disease, NERD). We investigated the value of endoscopic and histological markers for the prediction of NERD before and after treatment with 20 mg esomeprazole. <i>Methods:</i> Between July and October 2002, consecutive patients presenting for upper endoscopy were stratified into GERD and non-reflux patients (control group) with the help of a questionnaire. The endoscopist was blind to the presence of reflux symptoms. Using magnifying endoscopes minimal change esophagitis was defined by the presen…