Duodenal Tumor Presenting With Persistent Vomiting: Diagnostic and Therapeutic Challenges.

Duodenal tumors are rare neoplasms of the small intestine, often diagnosed at an advanced stage due to nonspecific clinical presentation and diagnostic challenges. We present the case of a 40-year-old patient hospitalized for vomiting, abdominal pain, and unintentional weight loss. During hospitalization, a duodenal mass was diagnosed, along with multiple liver metastases and associated gastrointestinal obstruction. This report discusses the epidemiology, pathogenesis, classification, clinical presentation, diagnostic methods, and therapeutic strategies for duodenal tumors, with particular emphasis on progressive intestinal obstruction and the need for appropriate nutritional interventions. This case highlights the importance of early diagnosis and an interdisciplinary approach in managing this rare disease.