| Theme | Frontier of image diagnosis for colorectal carcinoma | |
|---|---|---|
| Title | Endoscopic diagnosis of colorectal tumor | |
| Publish Date | 2009/03 | |
| Author | Shin Hasegawa | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Osamu Tsuruta | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Hiroshi Kawano | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Takeshi Tobaru | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Kenichi Yoshimori | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Mutsuhito Shiratsuchi | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Keiko Arita | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Kotaro Kuwaki | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Keiichi Mitsuyama | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| Author | Michio Sato | Division of Gastroenterology / Division of GI Endoscopy, Department of Medicine, Kurume University School of Medicine |
| [ Summary ] | We conducted a retrospective study on the effectiveness of endoscopic diagnosis（ histological diagnosis and diagnosis of invasion depth） using two magnifing endoscopic modes. One method employed staining with crystal violet (crystal violet staining method) and the other was a method which used the NBI (NBI method). The following results were obtained : The crystal violet staining method, had a calculated accuracy, sensitivity and specificity for histological diagnosis, which 73.3% , 50.8% and 97.1% respectively. The calculated accuracy, sensitivity and specificity for determining depth were 83.2%, 63.0% and 88.5% respectively. For NBI method, the calculated accuracy, sensitivity and specificity for histological diagnosis were 72.5% , 63.5% and 80.0% respectively, with calculated accuracy, sensitivity and specificity for depth of 90.8%, 55.6% and 100% respectively. The crystal violet staining method has been shown to have high rates of effectiveness for diagnosis of colorectal tumor through endoscopy. In this study, we found the NBI method to also be effective. However, our results showed that both methods were likely to indicate lesions to be more benign than histological diagnosis. The NBI method indicated lesions to be less deep than histological diagnoses. Therefore, we suggest that the NBI method may be more useful for diagnosis than the crystal violet staining method, when one can not see the surface of lesions because of blockage to views from obstructions such as mucus. |
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