This composite educational image features two frames (A and B) from an upper gastrointestinal endoscopy, illustrating the diagnosis and treatment of acute peptic ulcer bleeding in the duodenal bulb. Frame A demonstrates clinical findings of hematemesis and melena, showing two cratered, oozing ulcers located in the duodenum. Significant active hemorrhage is visible as bright red blood pooling over the mucosal surface. The largest ulcer measures approximately 10 mm in diameter with a visible base. Frame B shows the immediate post-intervention state following the administration of 1:10,000 epinephrine (4cc) and the deployment of metallic hemostatic clips. A hemostatic clip is clearly visible, mechanically compressing the ulcerated site to achieve primary hemostasis. The surrounding mucosa appears altered in color, showing a reddish-orange hue with reduced active bleeding compared to the initial diagnostic view. This sequence serves as a clinical teaching tool for endoscopic management of gastroduodenal artery-related bleeding and the utilization of endoscopic markers to guide subsequent angiographic interventions.

This endoscopic clinical photograph from an upper gastrointestinal endoscopy (EGD) displays the lumen of the distal duodenal bulb. Centered in the frame is a single, approximately 1-cm ulcerated lesion. The ulcer is characterized by a clean base and a slightly protuberant, elevated morphology. Distinctive features include irregular, 'heaped-up' mucosal edges surrounding the ulcer crater, and a cluster of translucent air bubbles typical of the insufflation process. Clinically significant signs of hemorrhage are visible, specifically active oozing of bright red blood (Forrest classification 1B) from the ulcer's margin. The surrounding mucosa shows slight erythema and texture changes indicative of gastric heterotopia or secondary inflammation. This image is an educational example of a peptic ulcer with features suspicious for an underlying mass lesion, requiring differential diagnosis between benign peptic ulcer disease and malignant or stromal tumors such as a Gastrointestinal Stromal Tumor (GIST).

This clinical photograph displays an upper gastrointestinal endoscopy (UGIE) view of the second part of the duodenum. The primary finding is a large, irregularly shaped ulcer approximately 2x2 cm in size, situated on the medial wall. The ulcer features prominent nodular margins and a base covered with dark, necrotic-appearing material and focal areas of hemorrhage. An arrow indicates the close anatomical proximity of the lesion to the duodenal papilla. The surrounding duodenal mucosa is erythematous and inflamed, with thickened, irregular folds and a granular texture suggestive of significant tissue reaction. This endoscopic view is critical for the differential diagnosis of duodenal pathologies, including malignancy (duodenal adenocarcinoma), complex peptic ulcer disease, or atypical presentations of granulomatous diseases like tuberculosis or groove pancreatitis. The image illustrates key markers for malignancy or chronic inflammation, such as nodularity and mucosal distortion.