| Theme | CT Colonography 2019 -- Recent Advances, Current Status and Its Evaluation as a Modality for Organized Cancer Screening | |
|---|---|---|
| Title | Limitations of CT Colonography for Detecting Flat Colorectal Lesions | |
| Publish Date | 2019/03 | |
| Author | Kazutomo Togashi | Department of Coloproctology, Aizu Medical Center Fukushima Medical University |
| Author | Kenichi Utano | Department of Coloproctology, Aizu Medical Center Fukushima Medical University |
| Author | Masato Aizawa | Department of Coloproctology, Aizu Medical Center Fukushima Medical University |
| Author | Daiki Nemoto | Department of Coloproctology, Aizu Medical Center Fukushima Medical University |
| Author | Noriyuki Isohata | Department of Coloproctology, Aizu Medical Center Fukushima Medical University |
| Author | Shungo Endo | Department of Coloproctology, Aizu Medical Center Fukushima Medical University |
| [ Summary ] | Diagnostic ability of CT colonography (CTC) for flat colorectal lesions has improved by utilizing virtual colonoscopic images, virtual enema images, and multi-planar reconstruction images. However, detectability of CTC for flat lesions is unsatisfactorily lower, compared with polypoid lesions. Detectability for laterally spreading tumor non-granular type, which shows very flat morphology and larger size, is also lower than that of polypoid type. Nevertheless, detectability for flat-shaped cancer is higher than that of flat-shaped adenoma. Also, detectability for sessile serrated adenoma/polyp (SSA/P), which usually shows flat morphology, is lower than that of colonoscopy. Awareness of CTC findings specific to SSA/P could improve its detectability. With recent emergence of automatic carbon dioxide gas injector and fecal tagging technique, diagnostic ability of CTC for flat colorectal lesions and SSA/P is expected to be better than before. | |