Abstract
As the progress of Multidetector row CT (MDCT) drastically improve the time and spatial resolution, CT has a major role in the staging of middle and lower bile duct cancer. Performing the thin slice CT with multiphase dynamic study before bile drainage and estimating the acquired CT images on the monitor by paging very carefully, the extension of the tumor can be revealed on the accuracy of the pathological findings. However, MDCT has the limitations such as difficulty of estimating the surface spread of the tumor, which is the frequent spread form of the middle and lower bile duct cancer, IDUS or Cholangioscopy is often required to estimate the surface spread of the tumor.
For the systematic diagnosis of the middle and lower bile duct cancer, we need to familiar with expert knowledge about not only MDCT but also various examination, the characteristics of bile duct cancer and the surgery.
