CT differentiation of solid serous XXXX .

@entity8703 @entity1 @entity5 @entity12679
AIM: To differentiate between @entity12679 ( @entity12679 ) and @entity8703 ( @entity8703 ) of the pancreas using dynamic CT findings. MATERIALS AND METHODS: Between 2001 and 2008, there were 3 @entity12679 and 15 @entity8703 surgically resected in our institute, for whom preoperative multidetector-row CT were available. Various CT features were retrospectively evaluated by two radiologists in consensus for the differentiation between the two entities. Delay time for early and delayed phase images were 40 and 180 or 240s, respectively. For qualitative assessment, density of the @entity5 relative to the surrounding parenchyma was evaluated, along with other characteristic features. In @entity1 for whom digital data were available, CT values of the @entity5 were measured, and quantitative assessment was also performed. Relative and absolute washout rate (RWR and AWR, respectively) were also calculated. RESULTS: Mean sizes of the two groups were similar. @entity5 were seen as low density area more frequently in @entity12679 than in @entity8703 on unenhanced CT (3/3 vs 1/14), and also on the delayed phase image (2/3 vs 0/14) (p<0.05). Fibrous capsule was observed more frequently in @entity12679 (2/3) than in @entity8703 (0/14). CT value of the @entity5 on unenhanced CT was significantly lower, and RWR was higher in @entity12679 than in @entity8703 (p<0.05, Mann-Whitney's U test). The difference in delayed phase CT density and AWR did not reach statistically significant level. CONCLUSION: Unenhanced and enhanced CT findings may be of value in differentiation between @entity12679 and @entity8703 .
