Factors affecting the detection of colorectal cancer and colon polyps on screening abdominal ultrasonography.

Hepato-gastroenterology Pub Date : 2015-03-01

Minoru Tomizawa, Fuminobu Shinozaki, Rumiko Hasegawa, Kazunori Fugo, Yoshinori Shirai, Yasufumi Motoyoshi, Takao Sugiyama, Shigenori Yamamoto, Takashi Kishimoto, Naoki Ishige

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Abstract

Background/aims: The aim of this study was to identify factors affecting the detection of colorectal cancer (CRC) and colon polyps (CPs) using abdominal ultrasonography (US).

Methodology: Patient records were analyzed retrospectively. Those diagnosed as having either CRC or CPs by colonoscopy performed after screening abdominal US were enrolled. The diagnostic criterion for CRC was an irregularly thickened wall or mass. CPs were diagnosed as spherical or ovoid hypoechoic lesions arising within the colonic lumen as seen on abdominal US.

Results: Sixteen patients had a total of 16 CRC lesions and 11 patients had a total of 17 CPs. All CRC lesions invaded deeper than the subserosa. Cancer cell invasion limited to the submucosa was noted in the two 1.5-cm CPs. Detection of these lesions was not associated with invasion to lymph or blood vessels. These results suggest that wall thickening might be the consequence of cancer cells invading below the subserosa, thereby resulting in the lesions becoming detectable on abdominal US.

Conclusions: Detection of CRC and CPs on abdominal US was associated with lesion size and depth of invasion.

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影响腹部超声筛查中大肠癌和结肠息肉检出率的因素。

背景/目的:本研究旨在探讨腹部超声(US)检测结直肠癌(CRC)和结肠息肉(CPs)的影响因素。方法:回顾性分析患者记录。在筛查腹部US后通过结肠镜检查诊断为CRC或CPs的患者被纳入研究。CRC的诊断标准是不规则增厚的壁或肿块。cp被诊断为出现在结肠内的球形或卵形低回声病变，如腹部超声检查所见。结果:16例患者共16个CRC病变，11例患者共17个CPs。所有结直肠癌病变浸润深度均超过浆膜下。在两个1.5 cm的cp中发现癌细胞侵袭仅限于粘膜下层。这些病变的检测与淋巴或血管的浸润无关。这些结果表明，壁增厚可能是癌细胞侵入浆膜下的结果，从而导致病变在腹部超声上被检测到。结论:腹部超声检查CRC和CPs的检出率与病变大小和浸润深度有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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