Yanai H, Yoshida T, Harada T, Matsumoto Y, Nishiaki M, Shigemitsu T, Tada M, Okita K, Kawano T, Nagasaki S
First Department of Internal Medicine, Yamaguchi University School of Medicine, Japan.
Gastrointest Endosc. 1996 Nov;44(5):578-82. doi: 10.1016/s0016-5107(96)70012-3.
Detailed information on the depth of invasion of superficial esophageal cancer is required for endoscopic mucosal resection. As a pretherapeutic diagnostic procedure, endoscopic ultrasonography using conventional 7.5 MHz systems has been ineffective at providing sufficient details. A newly developed, thin ultrasound probe system provides both radial and linear scanning for evaluation of superficial esophageal cancer.
Endoscopic ultrasonography was performed in 16 patients using a switchable probe driven at 20 MHz. Seventeen lesions of superficial esophageal cancer were evaluated for depth of invasion to discriminate mucosal from submucosal penetration.
The overall accuracy of staging was 64.7%. In all six errors, mucosal cancers were overstaged as submucosal invasion. The diagnostic accuracy was 80% when the muscularis mucosae was visualized.
A 20 MHz linear-radial switchable probe is a useful new method in the staging of superficial esophageal cancer.
内镜黏膜切除术需要有关表浅食管癌浸润深度的详细信息。作为一种治疗前诊断程序，使用传统7.5兆赫系统的内镜超声在提供足够细节方面一直效果不佳。一种新开发的细超声探头系统可进行径向和线性扫描，用于评估表浅食管癌。
使用可切换探头以20兆赫驱动，对16例患者进行内镜超声检查。对17个表浅食管癌病变的浸润深度进行评估，以区分黏膜层浸润和黏膜下层浸润。
分期的总体准确率为64.7%。在所有6例错误中，黏膜癌被过度分期为黏膜下层浸润。当可见黏膜肌层时，诊断准确率为80%。
20兆赫线性-径向可切换探头是表浅食管癌分期的一种有用的新方法。
