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Contribution of diffusion weighted MRI to diagnosis and staging in gastric tumors and comparison with multi-detector computed tomography Cover

Contribution of diffusion weighted MRI to diagnosis and staging in gastric tumors and comparison with multi-detector computed tomography

Radiology and Oncology
Volume 51 (2017): Issue 1 (March 2017)
By: Harun Arslan,  Mehmet Fatih Özbay,  İskan Çallı,  Erkan Doğan,  Sebahattin Çelik,  Abdussamet Batur,  Aydın Bora,  Alpaslan Yavuz,  Mehmet Deniz Bulut,  Mesut Özgökçe and  Mehmet Çetin Kotan  
Open Access
|Feb 2017
Figures & tables

Figures & Tables

T4N3M1 C Axial MDCT (A,B,C) and DWI (D,E,D,F,G). (A) Axial contrasted-enhanced MDCT shows gastric corpus tumor and adjacent lymphadenopathies, (B) peripherally contrast enhanced lesions in the liver (metastasis), and (C) an invasive mass extending from the posterior of the gastric corpus to the fatty tissue (arrows). On DWI (D–G): on b800 DWI (D, E) there are diffusion restrictions in the gastric corpus and liver (Gastric tumor + liver metastasis), (F) restrictions that are compatible with lymphadenopathies are seen in the gastro-hepatic ligament, hepatic hilum, and the celiac axis, and (G) invasion of the fatty tissue in the posterior of the gastric corpus (arrow).
T2N3M0 C Axial MDCT (A, B) and DWI (C,D,E) . (A,B) axialcontrast-enhanced MDCT: Wall thickness in the gastric cardia-corpus and gastro-hepatic ligament and para-aorticlymphadenopathies, (C, D, E) b800 DWI images: (C) Diffusion restriction in the gastric cardia and corpus, (D) mm sized lymphadenopathiesin the gastrohepatic ligament, and(e)para-aorticandceliac lymphadenopathies.
(A, B) T2N2M0 Axial MDCT and b800 DWI. (A) Axialcontrast-enhanced MDCT and (B) b800 DWI demonstrate wall thickness in the gastric corpus withdiffusion restrictions, andadjacent lymphadenopathies (mm sized) on DWI.
(A, B) T3N1MO Axial MDCT and DWI. (A) Axialcontrast-enhanced MDCT and (B) DWI demonstratewall thickness at gastric corpus and diffusion restriction and adjacent lymphadenopathieswere observed (arrow).

Effectiveness of DWI and MDCT in T staging according to surgical pathology result

  T2T3T4
  Sensitivity72.7%71.0%55.6%
  Specificity77.5%80.0%92.9%
DWIPPV47.1%84.6%62.5%
  NPV91.2%64.0%90.7%
  Kappa (p)0.419 (0.002)0.488 (< 0.001)0.506 (< 0.001)
  Sensitivity63.6%74.2%66.7%
  Specificity77.5%80.0%95.2%
MDCTPPV43.8%85.2%75.0%
  NPV88.6%66.7%93.0%
  Kappa (p)0.353 (0.009)0.523 (< 0.001)0.647 (< 0.001)

Efficiency of DWI and MDCT in N staging according to surgical pathology result

  N1N2N3
  Sensitivity75.0%79.3%60.0%
  Specificity84.6%77.3%97.6%
DWIPPV60.0%82.1%85.7%
  NPV91.7%73.9%90.9%
  Kappa (p)0.549 (< 0.001)0.563 (< 0.001)0.649 (< 0.001)
  Sensitivity66.7%69.0%50.0%
  Specificity82.1%68.2%90.2%
MDCTPPV53.3%74.1%55.6%
  NPV88.9%62.5%88.1%
  Kappa (p)0.448 (0.001)0.367 (0.008)0.418 (0.003)
DOI: https://doi.org/10.1515/raon-2017-0002 | Journal eISSN: 1581-3207 | Journal ISSN: 1318-2099
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Language: English
Page range: 23 - 29
Submitted on: Feb 7, 2016
Accepted on: Aug 24, 2016
Published on: Feb 22, 2017
Published by: Association of Radiology and Oncology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
gastric cancer,
diffusion weighted imaging,
MDCT,
staging
Related subjects:
Medicine,
Clinical medicine,
Internal medicine,
Haematology, oncology,
Radiology

© 2017 Harun Arslan, Mehmet Fatih Özbay, İskan Çallı, Erkan Doğan, Sebahattin Çelik, Abdussamet Batur, Aydın Bora, Alpaslan Yavuz, Mehmet Deniz Bulut, Mesut Özgökçe, Mehmet Çetin Kotan, published by Association of Radiology and Oncology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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