An 8-month-old infant presented with a 1 month history of protracted diarrhea, vomiting, and weight loss. Small intestinal biopsy showed a flat mucosa and there was no clinical improvement with gluten, cow's milk protein, and disaccharidase-free diet. Serial testing for autoantibodies revealed persistent autoantibodies to gut epithelial cells and to renal brush borders; on two occasions, atypical liver-kidney microsomal antibodies were detected. Treatment with steroids produced clinical improvement but the patient finally succumbed with a combination of gut and renal dysfunction. The widespread nature of the antibodies, with clinical involvement of gut, liver, and kidney, suggest an underlying autoimmune mechanism for the pathogenesis of the condition. Serial autoantibody measurements may provide a means to monitor the disease progress and may be a guide to treatment.
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