| Theme | Update on laterally spreading tumor (LST) | |
|---|---|---|
| Title | Definition of laterally spreading tumor | |
| Publish Date | 2006/09 | |
| Author | Shin-ei Kudo | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Yui Kudo | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Keita Sasajima | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Hiroshi Kashida | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Kazuo Otsuka | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Fuyuhiko Yamamura | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| [ Summary ] | Tumors, consisting of a cluster of granules, are likely to extend laterally (along the interior wall of the intestinal lumen) rather than vertically. Such lesions have been called creeping tumors, granular cluster type lesions, assembled nodular type lesions, or IIa cluster type lesions. We have noted that there are also tumors which extend laterally, but are not granular in shape. It was decided to term these lesions collectively as laterally spreading tumors (LSTs) of the granular type and non-granular type. Both types of LST are so short and so undistinguished in color as to be very difficult to diagnose endoscopically. The non-granular type LST in particular is difficult to detect without dye spraying, which is generally useful for identifying the extent of such lesions. Treatment : EMR (endoscopic mucosal resection), EPMR (endoscopic piecemeal mucosal resection) and ESD (endoscopic submucosal dissection) can also be used to achieve complete resection of lesions. |
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