S2147 That's a Lot of Air! a Case of Incidental Pneumatosis Intestinalis

Abstract

Introduction: Pneumatosis cystoides intestinalis (PCI) is a rare condition characterized by the presence of gaseous cysts in the submucosa and subserosa of the gastrointestinal tract with an incidence of 0.03%. Common causes include pulmonary disease, chemotherapy, ileal surgeries or bowel obstruction with rare causes linked to lactulose or sorbitol-containing compounds. Management is usually conservative after excluding emergent surgical causes like bowel ischemia or bleeding. We describe a case of PCI found incidentally on imaging in a male with cerebral palsy. Case Description/Methods: A 24-year-old male with an extensive medical history notable for cerebral palsy, epilepsy, tracheostomy and gastrostomy dependence and recurrent small bowel obstructions, presented for evaluation after an outpatient computed tomography (CT) chest demonstrated extensive pneumatosis involving the imaged transverse colon. On review, the patient had a history of abdominal distention and intermittent alternating constipation and liquid stools. Physical examination revealed abdominal distention without tenderness or stool in the rectal vault. Workup revealed normal complete blood count, metabolic profile and lactic acid. CT of the abdomen showed extensive pneumatosis involving the colon (Figure). Considering that the patient had no signs of acute abdomen, he was managed conservatively with gastric decompression. Care was taken to avoid hypoxia and hypotension. Serial abdominal exams and X rays showed improvement and he was restarted on tube feeds which he tolerated well and was discharged home. A few days later, he presented with hematochezia and repeat CT abdomen redemonstrated colonic pneumatosis, however now with new free air. He was managed conservatively again with colonic decompression and slow introduction of feeds and was stable for discharge. Discussion: Pneumatosis cytoides intestinalis is an uncommon condition that can present from asymptomatic abdominal distention to diarrhea and hematochezia. In our case, the proposed mechanism could be related to recurrent bowel obstructions, pulmonary disease or the sorbitol content of his anti-seizure medications. Management is usually conservative with surgery reserved for toxic patients and hyperbaric oxygen used in select patients. Although this patient had hematochezia, he was able to be managed conservatively without surgery. Therefore, in most patients, despite concerning features, PCI may be appropriately managed without surgical intervention.Figure 1.: Diffuse Colonic Pneumatosis and Dilatation.