Blue-green endoscopy in a dog presenting chronic vomiting-regurgitation

Matteo Cerquetella,Gabrio Bassotti,Giacomo Rossi,Andrea Spaterna,Beniamino Tesei

doi:10.1186/s13620-015-0045-2

Matteo Cerquetella, Gabrio Bassotti + Show 3 more

Open Access

https://doi.org/10.1186/s13620-015-0045-2

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Abstract

A 2-year-old male Maremma sheepdog presenting with chronic vomiting-regurgitation was examined at the University Veterinary Teaching Hospital, Camerino University. An oesophagogastroscopy with a single blue + green (BG) filter restricting wavelengths from 400 to 550 nm was carried out. A conventional white light endoscopy showed a dilated oesophagus with mildly diffuse erythematous mucosa (more accentuated proximal to the cardia); some portions of the gastric mucosa were covered with fluids and appeared only slightly erythematous. A blue green endoscopy highlighted the oesophageal lesions in dark blue, which made them appear more clearly defined from the remaining mucosa. In the gastric antrum, a small, slightly darker blue roundish area was visible. This area did not show up under the white light endoscopy. A histopathological assessment of biopsy specimens from the distal oesophagus, antrum (including the area highlighted only by BG endoscopy) and gastric body showed chronic-active hyperplastic esophagitis and superficial squamous epithelial dysplasia, while gastric samples showed severe diffuse hyperaemic gastritis of the antrum and superficial diffuse atrophy of the gastric body. The authors believe that the use of a BG endoscopy could be useful in veterinary medicine to increase the diagnostic potential of endoscopic assessment in animals.

Highlights

Narrow Band Imaging (NBI, Olympus) is an advanced technology frequently used in human medicine that allows endoscopic image enhancement [1]
In this report, unlike white light endoscopy, blue + green (BG) endoscopy allowed us to obtain more clearly defined pictures of the oesophageal lesions distinguishing them from the remaining mucosa
With regard to the areas of the gastric body presenting histopathologically with superficial atrophy, no differences were highlighted when visualized with a white light endoscopy and subsequently with a BG endoscopy

Summary

Introduction

Narrow Band Imaging (NBI, Olympus) is an advanced technology frequently used in human medicine that allows endoscopic image enhancement [1]. Background Narrow Band Imaging (NBI, Olympus) is an advanced technology frequently used in human medicine that allows endoscopic image enhancement [1]. NBI is obtained by using filters on the white light source; it uses narrow wavelengths, like blue (400–430 nm) and green (525–555 nm) [4, 5], bandwidth 30 nm [2]; since a light with a short wavelength can only penetrate the mucosa superficially, it is possible to define its surface portions more clearly [4].

Results

Conclusion