1911 Acquired Double Pylorus: The Road Less Traveled

Abstract

INTRODUCTION: A double pylorus channel can be congenital or acquired. Acquired double pylorus is thought to be the result of a gastric or duodenal ulcer forming a fistula between the prepyloric antrum and the duodenal bulb. Although it is a rare endoscopic finding, seen in only 0.001%–0.4% of upper gastrointestinal endoscopies1, when acquired, it signifies peptic ulcer disease (PUD) which needs risk factor modification and treatment. CASE DESCRIPTION/METHODS: A 50-year-old man with alcohol use disorder, newly diagnosed alcoholic cirrhosis and recent NSAID use presented with confusion, melena and dark emesis. His physical exam was notable for hypotension (BP 86/55 mmHg), somnolence, confusion and positive asterixis. Laboratory values were remarkable for hemoglobin of 5 g/dL, BUN of 48 mmol/L, platelets of 271 × 109/L and INR of 2. Management included fluid resuscitation, blood transfusion, proton pump inhibitor and octreotide drip. Once hemodynamically stabilized, an upper endoscopy was performed revealing blood in the gastric body, two antral ulcers with visible vessels, but no endoscopic stigmata of liver disease. Adjacent to the pylorus, a slit-like channel connecting the prepyloric antrum to the duodenal bulb was noted and traversed with the endoscope. Helicobacter pylori work up revealed a positive serum antibody. Patient did well post-procedure and received Helicobacter pylori eradication treatment and counseling on alcohol cessation and NSAID avoidance. DISCUSSION: In contrast to congenital double pylorus which is an incidental finding, patients with acquired double pylorus often present with symptoms of PUD. In this case, likely culprits included NSAIDs and Helicobacter pylori. It should be distinguished from other similar appearing endoscopic findings such as gastric diverticulum, as risk factors for PUD need to be investigated in patients with an acquired double pylorus. While treatment with acid suppression and Helicobacter pylori eradication should be pursued, the fistula tract often persists despite treatment2. Endoscopic recognition and familiarity are key to ensure appropriate risk modification, treatment and prevention of endoscopic complications with side-viewing scopes.