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World J Gastroenterol. Dec 14, 2014; 20(46): 17552-17557
Published online Dec 14, 2014. doi: 10.3748/wjg.v20.i46.17552
Published online Dec 14, 2014. doi: 10.3748/wjg.v20.i46.17552
Laterally spreading tumors: Limitations of computed tomography colonography
Kazutomo Togashi, Kenichi Utano, Department of Coloproctology, Aizu Medical Center, Fukushima Medical University, Aizuwakmatsu-city, Fukushima 969-3492, Japan
Kazutomo Togashi, Hisanaga Horie, Alan T Lefor, Yoshikazu Yasuda, Department of Surgery, Jichi Medical University, Shimotsuke, Tochigi 329-0498, Japan
Kenichi Utano, Shigeyoshi Kijima, Yosuke Sato, Hideharu Sugimoto, Department of Radiology, Jichi Medical University, Shimotsuke, Tochigi 329-0498, Japan
Keijirou Sunada, Department of Gastroenterology, Jichi Medical University, Shimotsuke, Tochigi 329-0498, Japan
Author contributions: Togashi K and Utano K contributed equally to this work; Kijima K, Sato Y, Horie H and Sunada K performed research; Lefor AT, Sugimoto H and Yasuda Y made a critical revision; Yasuda Y approved the final manuscript.
Correspondence to: Kazutomo Togashi, MD, PhD, Department of Coloproctology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakmatsu-city, Fukushima 969-3492, Japan. togashik@fmu.ac.jp
Telephone: +81-24-2752100 Fax: +81-24-2752568
Received: December 10, 2013
Revised: February 10, 2014
Accepted: June 2, 2014
Published online: December 14, 2014
Revised: February 10, 2014
Accepted: June 2, 2014
Published online: December 14, 2014
Core Tip
Core tip: Laterally spreading tumors (LSTs) are a major target for colon screening. Nevertheless, it is still unknown what percentage of LSTs can be identified with computed tomography (CT) colonography (CTC). It has been reported that CTC may miss flat neoplastic lesions regardless of their size. It is a fascinating clinical question whether non-granular type LSTs, which have a very flat appearance on optical colonoscopy, can be identified with CTC. This study demonstrated that the detection rate of LSTs by CTC, particularly the non-granular type was not acceptable. Practitioners should be aware of the relatively low detection rate when using CTC.