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TitlePreoperative staging of rectal cancer with MRI: correlation with pathologic staging
Author(s)Abreu, Soraia Filipa Macado
Martins, Sandra
KeywordsRectal cancer
Pelvic magnetic resonance
Issue date2015
JournalJournal of Coloproctology
CitationAbreu, Soraia Filipa Macado, & Martins, Sandra Fátima Fernandes. (2015). Preoperative staging of rectal cancer with MRI: correlation with pathologic staging. Journal of Coloproctology (Rio de Janeiro), 35(2), 77-82
Abstract(s)[INTRODUCTION] An accurate preoperative rectal cancer staging is crucial to the correct management of the disease. Despite great controversy around this issue, pelvic magnetic resonance (RM) is said to be the imagiologic standard modality. This work aimed to evaluate magnetic resonance accuracy in preoperative rectal cancer staging comparing with the anatomopathological results. METHODS We calculated sensibility, specificity, positive (VP positive) and negative (VP negative) predictive values for each T and N. We evaluated the concordance between both methods of staging using the Cohen weighted K (Kw), and through ROC curves, we evaluated magnetic resonance accuracy in rectal cancer staging. RESULTS 41 patients met the inclusion criteria. We achieved an efficacy of 43.9% for T and 61% for N staging. The respective sensibility, specificity, positive and negative predictive values are 33.3%, 94.7%, 33.3% and 94.7% for T1; 62.5%, 32%, 37.0% and 57.1% for T2; 31.8%, 79%, 63.6% and 50% for T3 and 27.8%, 87%, 62.5% and 60.6% for N. We obtained a poor concordance for T and N staging and the anatomopathological results. The ROC curves indicated that magnetic resonance is ineffective in rectal cancer staging. CONCLUSION Magnetic resonance has a moderate efficacy in rectal cancer staging and the major difficulty is in differentiating T2 and T3.
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AccessOpen access
Appears in Collections:ICVS - Artigos em Revistas Internacionais com Referee

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