| Theme |
Early Colorectal Cancer -- Recent Topics |
| Title |
Effectiveness of Magnifying Endoscopy in Diagnosing Colorectal Lesions |
| Author |
Hiroshi Kawano |
Department of Medicine II, Kurume University School of Medicine |
| Author |
Osamu Tsuruta |
Department of Medicine II, Kurume University School of Medicine |
| Author |
Yuichiro Tsuji |
Department of Medicine II, Kurume University School of Medicine |
| Author |
Takeshi Tobaru |
Department of Medicine II, Kurume University School of Medicine |
| Author |
Kenichi Yoshimori |
Department of Medicine II, Kurume University School of Medicine |
| Author |
Michio Sata |
Department of Medicine II, Kurume University School of Medicine |
| Author |
Atsushi Toyonaga |
Division of Gastroenterology and Endoscopy, Kurume University School of Medicine |
| Author |
Nobuyuki Arima |
Department of Pathology, Kurume University School of Medicine |
| [ Summary ] |
Magnifying colonoscopy has received attention as a useful clinical diagnostic modality for colorectal lesions. We evaluated the relationship between pit patterns and histological findings from magnifying colonoscopy. Lesions with type I or II pit patterns are not tumorous, whereas lesions with type IIIs, IIIL, IV or V pit patterns are tumorous. The incidence of cancer is 80% in type V lesions. For diagnosing the invasion depth of colorectal cancer, we created subclassifications of the type V pit pattern; VI with clear outlines, VI with unclear outlines, and VN. The incidence of sm2-3 cancer is 90% in type VN lesions, 70% in type VI with unclear outlines, 30% in VI with clear outlines and 0% in other than type V. Therefore, magnifying colonoscopic examination, using crystal violet staining, proved to be useful for diagnosing colorectal cancer and diagnosing invasive colorectal cancers. However, this method for is not always necessary when diagnosing invasive colorectal cancer. We can diagnose sm2-3 cancer through conventional colonoscopy, and when we can not diagnose sm2-3 cancer through conventional colonoscopy, we should use magnifying colonoscopy. |