| Theme | Expansion of Indications for Endoscopic Mucosal Resection of Early Gastrointinal Cancer | |
|---|---|---|
| Title | Endoscopic Ultrasonography for Patients with Esophageal Cancer Invading the Deep Mucosa or Superficial Submucosal Layer | |
| Publish Date | 2001/11 | |
| Author | Tatsuyuki Kawano | Department of Surgery, Tokyo Medical and Dental University Hospital |
| Author | Kagami Nagai | Department of Surgery, Tokyo Medical and Dental University Hospital |
| Author | Tetsuro Nishikago | Department of Surgery, Tokyo Medical and Dental University Hospital |
| Author | Katsunori Ami | Department of Surgery, Tokyo Medical and Dental University Hospital |
| Author | Yasuaki Nakajima | Department of Surgery, Tokyo Medical and Dental University Hospital |
| Author | Kenro Kawada | Department of Surgery, Tokyo Medical and Dental University Hospital |
| Author | Takehisa Iwai | Department of Surgery, Tokyo Medical and Dental University Hospital |
| [ Summary ] | An examination using a high frequency ultrasound thin probe is one of the most appropreate modalities in the evaluation for superficical esophageal cancers. Detailed examination of the ultrasonic structure of the esophagus following conventional endoscopic observation is possible. Nine-layers structure is commonly observed with esophageal endosonography, using a 20MHz ultrasound thin probe. The 9 sono-layers are translatable to the 5-layers structure obtained through traditional EUS examination. Although there are some clinical points necessary to obtain good ultrasound figures, the techniques for using endosonography with an ultrasound thin probe are not difficult. Defining a sonolayer concerning the muscularis mucosa is the most important step in the pretreatment diagnosis of superficial esophageal tumors. Endosonography, using a thin probe is useful in differentiating between mucosal and submucosal tumors, detecting the pattern of intramural spreading of the tumor, etc. However, the diagnosis of microinvasion of the tumor and differentiation between tumor invasion and lymphoid hyperplasia are both still problematic. |
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