This composite educational illustration details the pathogenesis and clinical imaging of a peptic ulcer. The left panel features a pathophysiology diagram showing purple, flagellated Helicobacter pylori bacteria penetrating a green mucous layer to reach red, inflamed epithelial cells, representing the primary infectious cause of gastric irritation. The center-right panel integrates diagnostic and anatomical content, featuring a grayscale barium swallow X-ray alongside a red anatomical diagram of the stomach. A yellow arrow on the X-ray identifies a barium collection outside the normal gastric outline, characteristic of an ulcer crater (ulcer niche). A supplementary cross-sectional illustration provides a microscopic view of the ulcer, depicting a blue-shaded crater penetrating through the mucosal and submucosal layers into the underlying tissue. This graphic is intended for medical students to understand the transition from microbial infection to macroscopic tissue damage and its subsequent appearance in radiological imaging.

This endoscopic image shows a large, 'punched-out' peptic ulcer located at the junction of the first and second portions of the duodenum. The ulcer is approximately 2 cm in diameter and features sharply demarcated, well-defined borders. The base of the ulcer is covered with a heterogeneous layer of yellowish-white necrotic debris and fibrin, interspersed with multiple erythematous spots and punctate stigmata of recent hemorrhage, suggesting active inflammation or recent bleeding. The surrounding duodenal mucosa appears edematous and mildly hyperemic compared to healthy tissue, with a loss of clear vascular architecture near the ulcer's edge. This clinical finding is characteristic of H. pylori-induced duodenal ulceration. The image serves as a diagnostic tool for identifying gastrointestinal bleeding sources and assessing the severity of mucosal damage in the upper digestive tract.

Summary : This flowchart outlines treatment pathways for upper gastrointestinal symptoms in regions with high prevalence of H. pylori and limited health-care resources, focusing on decision points for alarm symptoms, peptic ulcer disease suspicion, and H. pylori testing and eradication. flowchart: # Nodes : • Alarm symptoms? (rectangle) • Investigate (endoscopy or other tests) as indicated and if available (rectangle) • Symptoms suggestive of peptic ulcer disease? (rectangle, vertical orientation) • Empirical H. pylori eradication therapy (rectangle) – Avoid clarithromycin and levofloxacin if prior use – Ensure full duration and dose – Compliance support • H. pylori test if available and affordable (noninvasive or invasive) (rectangle) • Investigate as indicated and if available (endoscopy or other tests) (rectangle) • Clinical assessment of outcome (rectangle) • Case-by-case evaluation (rectangle) – Empirical H. pylori eradication therapy – H. pylori test – Other strategies # Connectors : • Alarm symptoms? → YES → Investigate (endoscopy or other tests) • Symptoms suggestive of peptic ulcer disease? → YES → Empirical H. pylori eradication therapy • Empirical H. pylori eradication therapy → Clinical assessment of outcome • Clinical assessment of outcome → BETTER → [end] • Clinical assessment of outcome → NOT BETTER → Case-by-case evaluation • Symptoms suggestive of peptic ulcer disease? → YES → H. pylori test if available and affordable • H. pylori test if available and affordable → Investigate as indicated and if available • Case-by-case evaluation → Empirical H. pylori eradication therapy / H. pylori test / Other strategies # Layout : • The flowchart is organized in a left-to-right and top-to-bottom manner. • The leftmost column contains the initial decision nodes (Alarm symptoms? and Symptoms suggestive of peptic ulcer disease?). • The central column contains investigation and therapy nodes. • The rightmost column contains outcome assessment and further evaluation nodes. • Arrows indicate YES branches and outcome-based directions (BETTER, NOT BETTER). # Analysis : • The flowchart prioritizes investigation for alarm symptoms and empirical H. pylori eradication therapy for suspected peptic ulcer disease. • H. pylori testing is recommended if available and affordable, otherwise empirical therapy is used. • Clinical assessment determines if further case-by-case evaluation is needed, with options to repeat therapy, test, or consider other strategies. • The process is designed for resource-limited settings, emphasizing flexibility and stepwise escalation based on availability and patient response.