Nur Afifah AzizKhalilah Alhuda KamilenAliyyah Mohammad Khuzaini2025-12-012025-12-012025-07-29Nur Afifah Aziz , Khalilah Alhuda Kamilen & Aliyyah Mohammad Khuzaini (2025) . Congenital duodenal stenosis: a rare cause of failure to thrive. Portuguese Journal of Pediatrics. https://doi.org/10.24875/pjp.250000012184-333310.24875/PJP.25000001https://pjp.spp.pt/files/es/pjp.25000001_rev1.pdfhttps://oarep.usim.edu.my/handle/123456789/28082IndexedIntroduction: Duodenal stenosis is a congenital condition involving partial obstruction of the duodenal lumen. It often presents later with vague symptoms, delaying diagnosis. Case Report: We describe the case of a 19-month-old girl with recurrent vomiting since the neonatal period, initially resolving with no signs of obstruction. At 16 months, she showed faltering growth, initially attributed to colitis, with temporary symptom improvement. Three months later, vomiting recurred. The combination of chronic vomiting, growth delay and symptom recurrence raised the suspicion of a structural issue. Imaging confirmed duodenal stenosis, and she underwent a corrective duod enoduodenostomy. Discussion: This case highlights incomplete intestinal obstruction with non-specific symptoms delaying diagnosis. Clinicians should maintain a high index of suspicion for structural anomalies in children with persistent vomiting and failure to thrive.en-USDuodenal atresia. Duodenal stenosis. Failure to thrivejournal-article14