Fig. 2From: Blue-green endoscopy in a dog presenting chronic vomiting-regurgitationAntrum. a and c White light endoscopy. The mucosa of the antrum appear only slightly erythematous and no erosions are visible. b and d BG endoscopy shows a small round area (red arrow) that appears colored with a slightly darker blue tint. Pictures c and d show a more close-up view of the antrumBack to article page