| Theme | Expansion of Indications for Endoscopic Mucosal Resection of Early Gastrointinal Cancer | |
|---|---|---|
| Title | Usefulness of Endoscopic Ultrasonography (EUS) in Determining the Indication of Endoscopic Resection for Early Colorectal Cancers | |
| Publish Date | 2001/11 | |
| Author | Tadayoshi Kakemura | 3rd Department of Internal Medicine, Toho University School of Medicine |
| Author | Shunichiro Ishitsuka | 3rd Department of Internal Medicine, Toho University School of Medicine |
| Author | Mitsuhiro Yoshida | 3rd Department of Internal Medicine, Toho University School of Medicine |
| Author | Kazuya Yoshimoto | 3rd Department of Internal Medicine, Toho University School of Medicine |
| Author | Sumio Fujinuma | Division of Digestive Endoscopy, Ohashi Hospital, Toho University School of Medicine |
| Author | Yoshihiro Sakai | Division of Digestive Endoscopy, Ohashi Hospital, Toho University School of Medicine |
| [ Summary ] | Endoscopic ultrasonography (EUS) has been important as an objective method in the diagnosis of depth invasion of digestive tract cancers. Echocolonoscopes and ultrasonic probes are used in EUS for colorectal diseases. EUS should be performed to provide valuable information in the consideration of performance characteristics. 3D manifestation, composed of surface rendered images and cross section images, enables us to understand the structure of lesions spatially. 3D-EUS should be useful to explore the deepest point of cancer invasion. The ultrasonic layer structure of the colon wall was demonstrated in ultrasonic images, consisting of 11 layers, at the maximum. However, in clinical cases, the colonic wall structure was usually divided into 9 layers. The images which corresponded to the muscularis mucosae cloud could not be continuously visualized. In determining the indication for endoscopic resection for early colorectal cancers, there are many problems with histological classification for the assessment of the depth of submucosal cancer invasion. Under the present circumstances, assessments peculiar to EUS, which enable us to be aware of histological classifications according to the vertical length of submucosal cancer invasion, are necessary. Further investigation into EUS in the diagnosis of early colorectal cancer invasion will provide increasingly superior information for endoscopic resection. |
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