Eosinophilic Gastrointestinal Disorders (EGID) are a rare and complex group of disorders that are characterized by eosinophilic infiltration of the gastrointestinal tract. Eosinophilic esophagitis (EoE) is limited to the esophagus while eosinophilic gastroenteritis (EGE) can involve any portion of the GI tract. Patients often present with a wide range of signs and symptoms including abdominal pain, nausea, vomiting, dysphagia, diarrhea, and even more serious manifestations such as intestinal obstruction or perforation as any length or layer of the GI tract can be involved such as mucosal, muscular, or serosal1,4,10. As a part of the work-up, patients frequently undergo CT scans and multiple endoscopies before the diagnosis is finally made as was true in our case of a 59 year-old male patient presenting with 2 months of nausea, abdominal pain and weight loss. He underwent EGDs, colonoscopies, a video capsule study and balloon enteroscopy before the diagnosis was confirmed histologically. Endoscopic findings can be variable and often include mucosal erythema, edema, strictures, polypoid lesions and ulcerations8. Radiographic findings are also unpredictable and may include mural thickening, nodularity, luminal narrowing, and perienteric inflammation suggestive of an acute inflammatory condition2,3,8. The diagnosis is confirmed on histopathological examination of biopsies that must show >15-50 eosinophils/high power field based on the location in the GI tract. In our patient, erythema, scalloping, whitish exudate, and patches of villous blunting with a flat pink appearance were noted in the duodenum to proximal ileum endoscopically with >50 eosinophils/hfu confirming the diagnosis of eosinophilic enteritis. This class of diseases is often found in patients with a history of allergic disorders including asthma, eczema, seasonal allergies and food allergies suggestive of hypersensitivity in the etiology of the disease although our patient had no such known history4. Elimination diets and steroids are the mainstay of therapy and often lead to complete resolution of symptoms as well as endoscopic and radiographic findings in up to 90% of patients as was seen in our patient, although some patients have a chronic remitting course8.Figure: Endoscopy showing erythematous gastric nodules in the antrum of the stomach.Figure: Endoscopy showing erythema, scalloping, and villous blunting throughout portions of gastrointestinal tract.
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