RESUMEN
Eosinophilic enteritis (EoN), a subtype of eosinophilic gastrointestinal disease, is a rare and complicated inflammatory condition affecting the small intestine. This case report discusses a 42-year-old patient who presented with acute gastrointestinal symptoms including diarrhea, nausea, and vomiting. Initial laboratory investigations revealed leukocytosis, peripheral eosinophilia, and distinctive imaging findings, prompting further evaluation. Endoscopic evaluation revealed extensive mucosal lesions in the small intestine, with subsequent biopsies confirming eosinophilic infiltration, ultimately leading to the diagnosis of chronic enteritis, probably of an eosinophilic nature. The case highlights the complex differential diagnostic process involved in identifying EoN, which requires a comprehensive understanding of all the clinical and histopathological features of the disease. The efficacy of budesonide therapy is also discussed in the management of EoN and it was evidenced by our patient's positive response to treatment. This case report contributes significant insights into the understanding and management of EoN, providing essential information for the medical community to facilitate accurate diagnosis and tailored therapeutic interventions for individuals experiencing this complex disorder.