RADIOLOGY: GASTROINTESTINAL: GI: Case# 33674: NF 1 DUODENAL NEUROFIBROMA. 55-year-old female with history of neurofibromatosis. Patient gives history of previous cholecystectomy and hysterectomy. 1. Large right sided abdominal mass consistent with that of neurofibroma as noted on prior outside hospital CT scan now seen to have slightly increased in size. 2. Evidence of biliary and pancreatic ductal dilatation up to the level of the ampulla.