| Theme | New Development of Laterally Spreading Tumor | |
|---|---|---|
| Title | Magnifying Endoscopy Finedings and the History of LST | |
| Publish Date | 2015/08 | |
| Author | Hiro‒o Matsushita | Department of Gastroenterology, Akita Red Cross Hospital |
| Author | Hiro‒o Yamano | Department of Gastroenterology, Akita Red Cross Hospital |
| Author | Kenjiro Yoshikawa | Department of Gastroenterology, Akita Red Cross Hospital |
| Author | Eiji Harada | Department of Gastroenterology, Akita Red Cross Hospital |
| Author | Yoshihito Tanaka | Department of Gastroenterology, Akita Red Cross Hospital |
| Author | Michiko Nakaoka | Department of Gastroenterology, Akita Red Cross Hospital |
| Author | Yuko Yoshida | Department of Gastroenterology, Akita Red Cross Hospital |
| [ Summary ] | LSTs are classified into two types according to their morphology, the granular type (LST‒G) and the non‒granular type (LST‒NG). Each type has two sub‒groups ; the former has a homogeneous type [LST‒G (H)] and a nodular mixed type [LST‒G (M)], and the latter has a flat elevated type [LST‒NG (F)] and pseudo‒depressed type [LST‒NG (PD)]. Each subtype of the LSTs has its own characteristics. On magnifying endoscopy, a type IVB or type IIIL‒1 pit pattern is seen in many lesions of the LST‒G (H) type. Type IVB, type VV, or type VI pit patterns are seen in many lesions of the LST‒G (M) type, and type IIIL‒2 or type IIIL‒1 pit patterns are seen in many lesions of the LST‒NG (F) type. The majority of cases of the LST‒NG (PD) type had a type IIIL pit pattern. It is important to carry out qualitative diagnosis of all cases using magnifying endoscopy based on the clinicopathological characteristics of the LST subtype. | |