Yamada Ichiro, Yoshino Norio, Tetsumura Akemi, Okabe Satoshi, Enomoto Masayuki, Sugihara Kenichi, Kumagai Jiro, Shibuya Hitoshi
Department of Diagnostic Radiology and Oncology, Graduate School, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.
Int J Biomed Imaging. 2009;2009:659836. doi: 10.1155/2009/659836. Epub 2010 Jan 31.
Purpose. To assess the accuracy of high-resolution MR imaging as a means of evaluating mural invasion and lymph node metastasis by colorectal carcinoma in surgical specimens. Materials and Methods. High-resolution T1-weighted and T2-weighted MR images were obtained in 92 surgical specimens containing 96 colorectal carcinomas. Results. T2-weighted MR images clearly depicted the normal colorectal wall as consisting of seven layers. In 90 (94%) of the 96 carcinomas the depth of mural invasion depicted by MR imaging correlated well with the histopathologic stage. Nodal signal intensity on T2-weighted images (93%) and nodal border contour (93%) were more accurate than nodal size (89%) as indicators of lymph node metastasis, and MR imaging provided the highest accuracy (94%-96%) when they were combined. Conclusion. High-resolution MR imaging is a very accurate method for evaluating both mural invasion and lymph node metastasis by colorectal carcinoma in surgical specimens.
目的。评估高分辨率磁共振成像作为评估手术标本中结直肠癌壁内浸润和淋巴结转移手段的准确性。材料与方法。对92个包含96例结直肠癌的手术标本进行了高分辨率T1加权和T2加权磁共振成像。结果。T2加权磁共振图像清晰显示正常结直肠壁由七层组成。在96例癌中的90例（94%），磁共振成像显示的壁内浸润深度与组织病理学分期密切相关。作为淋巴结转移的指标，T2加权图像上的淋巴结信号强度（93%）和淋巴结边界轮廓（93%）比淋巴结大小（89%）更准确，当两者结合时，磁共振成像提供了最高的准确性（94%-96%）。结论。高分辨率磁共振成像是评估手术标本中结直肠癌壁内浸润和淋巴结转移的非常准确的方法。
