| Theme | Pit Pattern Classification in colorectal Lesion | |
|---|---|---|
| Title | History of Pit Pattern Classification | |
| Publish Date | 2008/10 | |
| Author | Hiroshi Kashida | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Shin-ei Kudo | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Nobunao Ikehara | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Masayuki Inui | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Toshihisa Hosoya | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Kunihiko Wakamura | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Yoshiki Wada | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Hiroshi Kanie | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Fuyuhiko Yamamura | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| Author | Kazuo Ohtsuka | Digestive Disease Center, Showa University Northern Yokohama Hospital |
| [ Summary ] | Pit pattern analysis originated in the 1960's, and classification was primarily established by the 1980's. Pit patterns were first observed with dissecting microscopes and fiberscopes. However, the advent of magnifying videodeoscopes in 1990's enabled easy and highly magnified observation in vivo. There has been some confusion about the subclassification of type V pit patterns. Pit patterns containing obvious nonstructural areas are called type VN, and ones with irregular pits are called type VI. Pit patterns with narrowed lumen, rough margins or unclear boundaries are called highly irregular pit pattern or type VI-high grade. VN and VI-high grade types can be accurate predictive factors for massively invasive submucosal cancers. New modalities for image enhancement such as narrow band imaging enable us to observe vascular patterns rather than pit patterns. Ultra high magnifying scopes such as those employed for endocytoscopy enable us to observe not only structural atypia but also cellular atypia. | |