| 特集名 | CT colonography | |
|---|---|---|
| 題名 | CT colonographyによる大腸腫瘍性病変の診断 (4) 平坦・陥凹型大腸早期癌の検出 a. MDCT有用性の検討 | |
| 発刊年月 | 2008年 03月 | |
| 著者 | 平田 一郎 | 藤田保健衛生大学消化管内科 |
| 著者 | 泉屋 隆 | 泉屋内科クリニック |
| 【 要旨 】 | 要旨はありません。 | |
| Theme | CT colonography | |
|---|---|---|
| Title | Efficacy of multidetector row CT (MDCT) for detection of flat and depressed colorectal cancer | |
| Author | Ichiro Hirata | Department of Gastroenterology, Fujita Health University |
| Author | Takashi Izumiya | Izumiya Clinic of Medicine |
| [ Summary ] | Background : Recently, the clinical efficacy with colorectal cancer screening by CT colonography has been reported in Europe and the United States. However, in Japan, the diagnosis of flat or depressed colorectal cancer lesions has been emphasized, and the question of whether CT colonography facilitates visualization of these lesions remains to be answered. In this study, the visualization of flat and depressed colorectal cancer lesions with CT colonography is compared to the visualization of protruding lesions. Methods : 33 Dukes A colorectal cancer lesions that had been examined with 3D-CT, colonoscopy, and barium enemas prior to surgery were invisfigated. CT colonography was performed immediately after colonoscopy on all patients. Volume rendering was used for three-dimensional rearrangement, and imaging findings were examined with respect to morphology, tumor diameter, and tumor height. Results : All (14 / 14) of the protruding type lesions were visualized with CT colonography, whereas 78.9 % (15 / 19) of the flat and depressed type lesions were visualized. There was no significant difference in tumor diameter between protruding type lesions and flat and depressed type lesions. With respect to tumor height, 100 % of the lesions measuring 2 mm or more in height were visualized, whereas only 42.9 % of those measuring less than 2 mm in height were visualized ; the difference was significant (p < 0.001). Conclusions : These results suggest that the visualization ability of CT colonography is associated with tumor height, but not with tumor diameter. Currently, lesions measuring 2 mm or more in height can be visualized reliably with CT colonography. |
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