magnifying chromoendoscopy | Acta Medica Marisiensis

Endoscopic Examination: a Present and Future Challenge

Boeriu Alina¹, Dobru Daniela¹, Mocan Simona², Pascarenco Ofelia³, Stoian M⁴, Boeriu C⁵

1 Department of Gastroenterology, University of Medicine and Pharmacy, Tîrgu Mureș, Romania
2 Department of Pathology, County Emergency Hospital, Tîrgu Mureș, Romania
3 Department of Gastroenterology, County Emergency Hospital, Tîrgu Mureș, Romania
4 Intensive Care Department, County Emergency Hospital, Tîrgu Mureș, Romania
5 Emergency Department, University of Medicine and Pharmacy, Tîrgu Mureș, Romania

The detection and surveillance of patients with premalignant gastric lesions could lead to early detection and treatment of gastric cancer. These lesions are mostly diagnosed in random biopsy samples obtained during conventional endoscopy. New endoscopic techniques, such as magnification endoscopy, may help the detection of neoplastic lesions. In this case series, we intended to emphasize the current problems in the detection and surveillance of gastric neoplasic lesions in clinical practice. Four cases with gastritis-like appearance on conventional endoscopy were identified with gastric dysplasia or carcinoma on histopathologic evaluation. We discussed the subjective interpretation of endoscopic findings, the challenges in the surveillance of low-grade dysplasia and the contribution of magnifying endoscopy on diagnostic accuracy. The performance of endoscopic examination and surveillance could be improved by magnified chromoendoscopy with targeted biopsies. An understanding of diagnostic challenges of gastric dysplasia is crucial in clinical management.

The Usefulness of Magnifying Chromoendoscopy with Methylene Blue in the Detection of Specialized Intestinal Metaplasia and Dysplasia in Barrett’s Esophagus — a Preliminary Report

Pascarenco Ofelia¹, Dobru Daniela¹, Boeriu Alina¹, Brusnic Olga¹, Galeanu Iuliana², Onisor Danusia³, Stoian M⁴

1 Department of Gastroenterology, University of Medicine and Pharmacy, Tîrgu Mureș, Romania
2 Department of Gastroenterology, Municipal Hospital, Câmpulung Moldovenesc, Romania
3 Department of Gastroenterology, Municipal Hospital, Luduș, Romania
4 Department of Intensive Care, University of Medicine and Pharmacy, Tîrgu Mureș, Romania

Background: Barrett’s esophagus appears in relation with gastroesophageal reflux disease, which damages the normal squamous mucosa; the injury heals through a metaplastic process in which columnar cells replace squamous ones. The specialized intestinal metaplasia has a malignant potential, but the diagnosis is often difficult in conventional endoscopy.
Aim: Our purpose was to evaluate the results of magnifying chromoendoscopy using methylene blue in the diagnosis of specialized intestinal metaplasia and dysplasia in Barrett’s esophagus.
Methods: Nine patients with proven or suspected Barrett’s esophagus in conventional endoscopy underwent magnified chromoendoscopy with methylene blue for confirming and/or monitoring the intestinal metaplasia or for detecting dysplasia. Biopsies were taken from sites coloured with methylene blue and from regions with particular patterns according to Endo’s classification.
Results: Specialized intestinal metaplasia was reported in 16 out of 29 biopsies; one biopsy proved low grade dysplasia and two samples showed indefinite for dysplasia. The sensitivity and specificity of methylene blue staining in detection of specialized intestinal metaplasia were 87% and 66% respectively (p=0.005). Taking into consideration Endo’s classification, tubular and villous patterns had a significant correlation with SIM detection (p=0.0004) with a sensitivity and a specificity of 66% and 100%.
Conclusions: Magnifying chromoendoscopy with methylene blue allows targeted biopsies for SIM and dysplasia detection; it also allows the selection of the site of the biopsy according to pitpattern.