Eosinophilic gastroenteritis: an uncommon cause of ascites

Eosinophilic gastroenteritis is an uncommon, chronic, immune-mediated condition characterized by eosinophilic infiltration that can affect any segment of the gastrointestinal tract. Clinical manifestations depend on the different layers of the intestinal wall affected, which also allows its classification into three subtypes (Klein classification): mucosal, which presents with abdominal pain, diarrhea, or vomiting; muscular, with obstruction or perforation; and serosal, classically with ascites. Diagnosis requires the demonstration of tissue eosinophilia with compatible clinical manifestations, after excluding other causes of eosinophilia. Currently, corticosteroids remain the first-line treatment, although there is no definitive consensus. This case highlights the importance of considering eosinophilic gastroenteritis as a rare cause of ascites in young patients.