Gastric Pneumatosis
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Gastric pneumatosis is rare and probably results from mucosal disruption due to ischemia or infection that allows gas to infiltrate into the wall of the stomach. In newborns, gastric pneumatosis is associated with necrotizing enterocolitis, but increased intragastric pressure from severe obstruction caused by duodenal blockage, pyloric stenosis, or a lactobezoar may also produce gastric pneumatosis.A 4-month-old girl presented with poor feeding and nonbilious emesis. At 1 month of age, she had been hospitalized briefly for emesis but was able to feed until 1 week before presentation. She appeared well, and her abdomen was soft but distended. Laboratory investigations revealed a hypochloremic metabolic alkalosis, and radiographs showed gastric pneumatosis (Panels A and B, arrows). A nasogastric tube was placed, and intravenous administration of fluids was started. Radiography of the upper gastrointestinal tract with contrast revealed contrast medium passing into the small intestine; follow-up images showed resolution of pneumatosis and a “double bubble,” which suggested duodenal obstruction (Panel C)...

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