Pneumatosis cystoides intestinalis misdiagnosed as pneumoperitoneum due to colon perforation in a patient with blunt trauma injuries: a case report.

A laparotomy is usually performed when pneumoperitoneum is identified on abdominal computed tomography (CT) in patients with trauma-related injuries. However, in rare cases, pneumatosis cystoides intestinalis (PCI) may be misinterpreted as free air due to bowel perforation. PCI typically follows a benign course and can be managed with physical examinations and imaging studies. In this case, however, the patient was comatose from a severe traumatic brain injury, rendering the physical examination unreliable. Abdominal CT revealed multiple extraluminal air foci in the retroperitoneal space surrounding the ascending colon, consistent with pneumoperitoneum. No evidence of intraoperative peritonitis was found. Nevertheless, because bowel perforation could not be definitively excluded, a right hemicolectomy was performed, and histopathological examination confirmed PCI.