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Preoperative staging of rectal cancer: accuracy of 3-Tesla magnetic resonance imaging

  • Gastrointestinal
  • Published:
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Abstract

The purpose of this study was to evaluate the accuracy of 3-Tesla magnetic resonance imaging (MRI) for the preoperative staging of rectal cancer. Thirty-five patients with a primary rectal cancer who underwent preoperative 3-T MRI using a phased-array coil and had a surgical resection were enrolled in the study group. Preoperatively, three experienced radiologists independently assessed the T and N staging. A confidence level scoring system was used to determine if there was any perirectal invasion, and receiver operating characteristic (ROC) curves were generated. The interobserver agreement was estimated using κ statistics. The overall accuracy rate of T staging for rectal cancer was 92%. The diagnostic accuracy was 97% for T1, 89% for T2 and 91% for T3, respectively. The predictive accuracy for perirectal invasion by the three observers was high (Az>0.92). The interobserver agreement for T staging was moderate to substantial. The overall sensitivity, specificity, and accuracy for the detection of mesorectal nodal metastases were 80%, 98%, and 95%, respectively. In conclusion, preoperative 3-T MRI using a phase-array coil accurately indicates the depth of tumor invasion for rectal cancer with a low variability.

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Authors and Affiliations

  1. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-ku, Seoul, 135-710, South Korea

    Chan Kyo Kim, Seung Hoon Kim, Dongil Choi, Hyo Keun Lim, Min Ju Kim, Jongmee Lee & Soon Jin Lee

  2. Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea

    Ho Kyung Chun, Woo-Yong Lee & Seong-Hyeon Yun

  3. Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea

    Sang-Yong Song

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  1. Chan Kyo Kim
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Correspondence to Seung Hoon Kim.

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Kim, C.K., Kim, S.H., Chun, H.K. et al. Preoperative staging of rectal cancer: accuracy of 3-Tesla magnetic resonance imaging. Eur Radiol 16, 972–980 (2006). https://doi.org/10.1007/s00330-005-0084-2

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  • DOI: https://doi.org/10.1007/s00330-005-0084-2

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