Pyloric Stenosis-like Gastric Outlet Obstruction Following Gastric Bypass: A Case Report

This case report describes a rare instance of hypertrophic pyloric stenosis (HPS) presenting after gastric bypass surgery in an adult patient. The patient exhibited symptoms of gastric outlet obstruction, including persistent vomiting and weight loss. Diagnostic imaging revealed significant pyloric muscle hypertrophy consistent with HPS, confirmed by endoscopic and histopathological findings. This report highlights the diagnostic challenges in differentiating HPS from more common post-bypass complications such as anastomotic stenosis. The case underscores the importance of thorough evaluation using imaging and histology to establish the diagnosis. Early recognition and appropriate surgical intervention led to symptom resolution. This report aims to increase awareness of this uncommon presentation and guide clinicians in managing similar cases effectively.