| [ Summary ] |
EUS is used for staging esophageal cancer including judegement of the depth of cancer, invasion and lymph node metastasis, diagnosis of submucosal tumors, assessment of the hemodynamic condition of esophageal varices,etc. Concerning the depth of cancer invasion, a discrimonation between T1lpm and cancer which has invaded more than the muscuraris mucosa was determined in 95% of the cases, based on delination of the m4 layer, EUS is useful in diagnosis of submucosal and monitoring treatments in esophageal varices. In the future, diagnoses will be inproved as advanced equipment is developed. |