“…Some experts have postulated that chronic corticosteroid use can cause atrophy of gastrointestinal lymphoid tissue, resulting in decreased submucosal integrity that may make it easier for intraluminal air to dissect into the intestinal wall (7). Patients with benign PI lack worrisome CT findings, such as bowel wall thickening or dilatation, ascites, soft-tissue stranding, free peritoneal fluid, small bowel involvement, or portal venous gas (8,9). The pattern of pneumatosis can also help distinguish benign from clinically worrisome PI.…”