Exploring the Multifactorial Aetiology of Gastric Emphysema in a complex case of Olmesartan-induced Enteropathy.

A gentleman in his 70s presents with a subacute history of bloating, diarrhoea, nausea and vomiting, dysphagia, and anorexia over the course of several months. This led to significant weight loss, malnutrition, and deconditioning requiring a prolonged hospital admission. Differentials included malignant, infectious, and autoimmune aetiologies. A gastroscopy revealed active chronic gastritis with no evidence of Helicobacter pylori and duodenal biopsy showed mild villi blunting and no increased epithelial lymphocytes with mixed inflammatory infiltrate within the lamina propria.