<prompt> Pneumatosis cystoids intestinalis isGas filled cysts in the subserosa or submucosa of the small intestineGas filled cysts in the subserosa or submucosa of the duodenumAn external fistula communicating with the caecum following operation of gangrenous appendicitisFibrotic thickening of the intestinal walls with narrow lumen  <response>: Gas-filled cysts are found in the subserosa or submucosa of the small intestine 1182-LBPneumatosis cvstoids intestinalis - in which gas-filled cysts are found in the subserosa or submucosa of the intestine or colon. Majority of cases are associated with COPD or the immunocompromised state eg. AIDS, post transplantation; in association with leukemia, lymphoma, vasculitis, or collagen vascular disease, and in those patients taking chemotherapy or corticosteroids other associated conditions include inflammatory, obstructive or infectious conditions of the intestine: iatrogenic conditions such as endoscopy and jejunstomy placement; ischemia and extra-intestinal disease such as diabetes. 