Jin Hur, Presenter: Nothing to Disclose

Mi-Suk Park MD, Abstract Co-Author: Nothing to Disclose

Joon Seok Lim MD, Abstract Co-Author: Nothing to Disclose

Jeong-Sik Yu, Abstract Co-Author: Nothing to Disclose

Jae Hee Lee, Abstract Co-Author: Nothing to Disclose

To evaluate the diagnostic accuracy of the dual-phase multi-detector row computed tomography (MDCT) with multiplanar reconstruction (MPR) images for preoperative staging of gastric cancer, with comparison to the new UICC TNM systems and the Japanese systems for N staging.

Forty-eight patients (49 tumors) with surgically confirmed gastric carcinoma underwent preoperative MDCT. Three radiologists evaluated the T and N staging on axial CT images alone and in combination with MPR images by consensus. For N staging, the UICC TNM classification and the Japanese classification were independently used for comparison. The CT findings were compared with the pathologic results, which served as the reference standard. Differences in accuracy for T and N staging were assessed by using the McNemar test.

In T staging, overall accuracy was 71% with axial images alone and 82% in combination with MPR images (P = 0.625). In N staging with the Japanese classification, the overall accuracy was 69% with axial images alone and 79% with combined axial and MPR images (P = 0.625). When using the new TNM classification for N staging, the overall accuracy was 60% with axial images alone and 67% with combined axial and MPR images (P = 0.735).

Combined axial and MPR imaging provided more accurate T and N staging than axial imaging alone in both classifications, but the difference was not statistically significant. For N-staging with the imaging methods, the Japanese classification was more accurate than the new TNM classification.

J.H.: Author is resident of Department of Diagnostic Radiology and Research Institute of Radiological Science, Yonsei University College of MedicineM.P.,J.L.,J.Y.,J.L.: Author is staff member of Department of Diagnostic Radiology and Research Institute of Radiological Science, Yonsei University College of Medicine

Hur, J, Park, M, Lim, J, Yu, J, Lee, J, Efficacy of Multi-Detector Row Computed Tomography in T and N Staging of Gastric Cancer: Comparison of UICC TNM and Japanese Staging Systems.  Radiological Society of North America 2005 Scientific Assembly and Annual Meeting, November 27 - December 2, 2005 ,Chicago IL. http://archive.rsna.org/2005/4415851.html